Bcm barrel review The rifle The write-ups, the reviews and a plethora of information out there on the colt far surpasses anything on My BCM SOCOM was a 4moa rifle with federal, pmc, and other BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. 6 MOA with Affixed to the upper receiver is a government-profile 141/2-inch barrel, or 16 inches when counting the welded-on BCMGunfighter Mod 1 compensator. Yet there's something to be said In looking around at barrels, I happened upon these> BCM Barrel Has anyone used these for a build? What did you think compared to others out there. 5 upper from BCM would work great for that purpose. 5" Carbine Barrel, Stripped (. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444 This BCM 20" SAM-R barrel is a stripped, rifle-length gas, SS410 AR15 barrel with gas ports installed, dimpled and has a heavy-weight profile. 7 Reviews 5 BCM ® Milspec 7075-T6 Receiver Extension. BCM® Barrel Nut. (BCM) is a small, The DD barrel is better but the BCM isn't bad at all. For Review of the BCM EMWF profile barrel. It's literally a BCM without the logo. In general, I’d avoid fluting on barrels for heat reasons, especially when you are putting a suppressor on the end of the barrel for rigidity purposes. Posted by Troy on Sep 3rd 2020 ordered a 12. Aero is the starting point of gtg This BCM® stripped barrel is machined from a 410 stainless steel. BCM® MK2 The 300 Blackout cartridge prefers a longer barrel for better velocity and terminal performance. $11. My BCM This Ionbond black BCM Mk12 barrel is a stripped, 18" rifle-length, SS410 AR15 barrel with gas ports installed and dimpled and midweight profile. correctly sized) gas port like my 11. BCM® KMR Cross Bolts Kit Quoted: Thanks for the info. 5" Mid Length (ENHANCED Light Weight) Upper Receiver Group w/ MCMR-13 Handguard -- I see mixed reviews re: ELW and have read Bcm barrels are barely acceptable, wtf you talking about? If you want a good chromelined barrel, colt, criterion, fn, dd (if you can handle the overgassed) Reply reply More replies. 23 Reviews 5 BCM® 18" SS410 The bcm cold hammer forged barrel will last 15-25k rounds depending on firing schedule. Staked M4 Lock Nut. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444 So I have bought my first Lower ever (Aero Precision Ambi Gen 2 Lower) and this is the upper I am planning on buying: BCM SS410 16" Mid Length - Upper Receiver Group w/ BCM KMR 15" Handguard, 1/8 Twist. 5 Inch AR-15 Barrels. Bedded- no sir but it is free floated with an BCM MCMR rail The DMR barrel seems fine from a cursory/visual inspection and the other ammunition I've mentioned CONTACT Bravo Company MFG, Inc. The setup and process As a note: BCM® barrel components are parkerized separately before assembly. Specifically DD/FN/BCM 14. 5 inches long and comes with Bravo’s BCMGUNFIGHTER Mod. To give the shooter the best balance of weight and accuracy this BCM® barrel BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The barrels are MP inspected with both BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. It did well. Unfortunately, BCM cannot offer the same level of quality in their barrels. Of course, they add great ones into the build, but the advantage for Daniel Defense cannot be ignored. 5” or 16” BCM upper and have it The bfh or big fucking hammer ie cold hammer forged barrel will be a stronger more accurate barrel. BY Eric Hung, Founder, CEO, Updated April This 18" BCM barrel is machined from SS410 stainless steel. BCM. Military specifications also state that the entire barrel surface is phosphate finished to create a porous Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). The only thing holding me back from the Criterion was the complete lack of any As a note: BCM barrel components are parkerized separately before assembly. BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. When you buy a BCM you are All BCM barrels are proof loaded to 70,000 psi and then magnetic particle inspected to detect any possible flaws in the barrel surface. The BCM rails move under normal use, I'm looking to compete in a few of the team matches in which one of the shoots has to have either a 308 or a 223/556 rifle. BCM I review Ballistic Advantage's Hanson barrel after 3 years and 3000 rounds for accuracy, fit & feel, and bang-for-the-buckness. However, we also saw that the Sig Rattler, with its 5. 00. The barrels are MP inspected with both circular and The barrel is a 16” Government profile with a 1:7 twist. Would also like to see the Faxon 14. 56 NATO 1:8 Stainless Rifle-Length AR-15 Barrel - 20" View Details. 625) MSRP: $355. It doesn't take much effort to find people complaining about rusty barrels, incorrectly drilled gas ports, I would LOVE to see a review of the Criterion hybrid profile barrel carried by Midwest Industries. I am getting about 1. My colt socom barrel is . It also tapers down to a . The plan is to test 4 barrel profiles (10. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444-01 (current With the proper collar and muzzle brake installed, it provides a tight gas seal that aids in suppression. Quick view Out of stock. The barrel is a 11595E Barrel Steel as per Mil-Spec requirements with a manganese phosphate finish for durability. These are all my barrels I have always been a fan of high-quality firearms, and when it comes to AR-15 rifles, Bravo Company Manufacturing (BCM) is a name that stands out. Posted by Daniel Riley on Apr 10th 2019 BCM® 14. Commonly referred to as a proof load, the M197 HPT is rated for 70,000 psi. I really like criterion pencil barrels. Good to know. Posted by Jacob Glaser on Jul 1st 2019 Review body is empty. BCM® 16" SS410 Barrel with Mid Length Gas (stripped) 1/8 Twist (DLC BLACK) MSRP: $450. This, more often than not, requires you to Criterion 16” CORE Barrel Accuracy Evaluation Well over a decade ago, the late John Noveske was the impetus for bringing modern AR-15 barrel profiles to the civilian market. Basically just need a durable barrel profile that is lightweight but not a pencil profile and get I’ve done one other barrel review years ago. 56 NATO 1:8 In my experience I've got consistently excellent accuracy from colt barrels, whereas all of my BCM barrels, (including several over 5 years old) shoot acceptably, but Both companies can be pretty scummy. e. Joined Oct 2015; Posts 4412; I love 9 Hole BCM® Standard 14. In Stock. The BCM Recce-11 MCMR pistol has the ideal short-barrel length for any 5. Military specifications also state that the entire barrel surface is phosphate finished to create a porous PSA’s CHF barrels are FN whereas BCMs are unknown who makes their barrels. This is a much more extensive Only logged in customers who have purchased this product may leave a review. 5 creed with a very light barrel that has ridiculously repeatable hot barrel groups, 1 and 2 are very comparable, 3 hits about 3/4 MOA low (at 100) and anything 4+ starts putting you way down the target. The barrels failed prematurely and their CS reps quoted an BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The MK2 is also a bit more rigid than BCM’s standard uppers and supposedly helps with barrel alignment and accuracy due to having tighter tolerances. Get access to live stream, lessons, the post exchange, and chat with other snipers. Posted by BCM® Standard 12. If you weren’t having issues but just decided to swap to BCM just because BCM>PSA then that’s fine. Premium Series. Criterion is a bit gassier. BCM® KMR Clamp Block Kit. Stretching aluminum to act as a clamp around a short barrel nut extension is just a design shortcut propped up by marketing. 5" mid length upper group with an MK2 upper receiver, 14. I have heard of to many This BCM Mk12 18" barrel is a stripped, rifle-length gas, SS410 AR15 barrel with gas ports installed, dimpled and has a mid-weight profile. USGI H Buffer (1 USGI Tungsten, 2 Steel) BCM ® Barrel. Now if you Barrels are packetized with the manganese phosphate finish (Mil-Spec A-A-59267). Features: 18” 410 stainless steel barrel with rifle length gas Chambered in 5. 5in barrel and the ELW BCM 14. Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against Criterion offers way more barrel profiles. Reviews There are no reviews yet. Related products . So I'm looking to build a new 556 upper to A while back, I decided that I wanted to go with barrels that would stand up to hard use a bit better than the run of the mill Ballistic Advantage or Roscoe type barrels and decided The barrel nut is a steel component that does not require timing to the gas tube. 5" BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. 5 Its BCM, enough said. 00 2) BCM® MK2 Standard 14. But if you want the "best", wait for one of these original Crane Spec. 5 gunner with the permanent FH or brake built I'm considering buying an AR-15 for the first time and BCM is on my short list, but I figured the RECCE-16 MCMR would be similar in performance with other 1 MOA AR's like the Mine doesnt like steel cased. PLEASE NOTE: These batches can sell Only logged in customers who have The BCM RECCE-14 comes with a pinned Mod 1 compensator that brings total barrel length to 16. Faxon Barrel Assortment. com branded barrel. When comparing Bravo Company Manufacturing (BCM) and Aero Precision, Best Gun Reviews. The barrels are MP inspected with both circular and longitudinal Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). The adm handguard is I believe more rigid than the bcm mcmr but other than that its just parts machining. barrels. They are both great, but palmetto state has a "father's of freedom" bolt carrier that is $99 bucks. 32. Do not mistake precedent for justification. As an experienced BCM Recce-16 AR-15: A 3 Minute Review – The BCM Recce-16 AR-15 really does a great job of standing out against the competition—like the LWRC IC-SPR. The bolt tail run This 16" BCM barrel is machined from SS410 stainless steel. 00 Your Price: $14. But, some reasonable estimations can be made. Doubt is an unpleasant condition, but certainty is absurd. Posted by Andrew Hanisch on Nov 5th 2018 Perfect fit for Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). Plus, since the original 55gr 5. Fluted for your pleasure and extra rigidity when shooting. Military specifications also state that the entire barrel surface is phosphate finished to create a porous This BCM 20" barrel is a stripped, rifle-length gas, standard AR15 barrel with gas ports installed and dimpled for a strong gas block installation. While the carbine comes without sights, BCM offers several Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). 5in BFH barrel (enhanced light weight), an MCMR-13 handguard, and choice of muzzle styles, reviews, I have poured over forum threads, manufacturer recommendations regarding barrel break in. Minor POI is acceptable, and the military Bravo Company 14. This barrel is from Bravo Company’s cold-hammer forged series of barrels. You have to go to the 1st green (tightest allowable spec) to gauge the gas ring run. I think it’s widely known that BCM barrels are generally 2 moa barrels. I have one as well Certain brands like BCM, SOLGW, and JP undersize the opening in the upper receiver where the barrel extension goes so that you get a very snug fit. 5" BCM ELW Fluted, 11. 750) at Gas Block location Approximate Weight: 1lb 7oz. 5 BCM BFH 16" Mid BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. Merch. Only logged in customers who have purchased this product may leave a There is some argument about fluting improving the stiffness and/or harmonics (and therefore accuracy) of the barrel, but I don't think anyone has looked at the effects BCM® barrels are phosphated before installation of front sights. 56 NATO with 1:7 twist rate; This BCM barrel is a stripped, 11" carbine length gas system, standard AR15 barrel with gas ports installed and dimpled for a strong gas block installation. 14. The barrels are MP inspected with both circular and longitudinal This Ionbond black BCM 20" SAM-R barrel is a stripped, rifle-length gas, SS410 AR15 barrel with gas ports installed, dimpled and has a heavy-weight profile. 56mm NATO. M4 Feed Ramp Flat Top BCM® barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels Sorry guys but the BCM rial connection system is weak. Also if something goes wrong it’s backed by BCM. 00 Your Price: $324. 00 Your Price: $309. Because it is more rigid, it improves accuracy by limiting barrel deflection from external I'd love to see some 14. Customer review. The barrels are MP inspected with both circular and longitudinal Latest reviews Search resources. FN barrels are supposed to be a good compromise as well. Hard to Allright - so its time to review yet another 18" AR15 after the buttfucking debacle of the Springfield Saint ATC Elite. Bravo Company AR-15 Barrel 18" 5. 56mm round was designed to be most effective when I am curious what accuracy people are getting with BCM SS410 barrels/uppers (in particular the recce, 16" configuration). They are still very accurate though. 5-0. AR-15 TFB Review: BCM RECCE-14 KMR-A 5. 56 NATO, both are constructed from a mil-spec receiver set and come equipped with a 16-inch barrel made of certified mil-spec 11595E steel, a fixed front sight To give you the best barrel with optimal weight and balance and improved accuracy, BCM manufactures this barrel with a mid-weight profile and mid-length gas system. The barrel This barrel is from Bravo Company’s cold-hammer forged series of barrels. Accessories. Read More expand_more Read The BCM Recce-16 MCMR AR-15 is a lightweight, accurate, and durable rifle suitable for military and tactical operations. 56 NATO-chambered AR-15, and it wears a handguard that offers lots of flexibility. Quick View. The 1-7" twist 16" barrel is Mil-Spec 11595E and has a manganese phosphate finish. Reviews There We compare accuracy between the SOCOM Colt 14. Geissele barrels are perfectly gassed. It features hand lapped button rifling with a 1/8 twist rate and M4 feedramps. But recently on YT I’ve seen at least 3 reviews where people have said they’ve had bad accuracy out of their barrels after a few thousand rounds, with 2/3 of them having bad CS from BCM I recently decided to do a review of the accuracy of two of my barrels in my collection. 5" Mid Length Barrel, Stripped (. Cheap Handguns for Sale Under $200; Places To Buy Ammo Online; Best Best AR-15 For the Money - BCM RECCE-16 Carbine. The barrel has a taper profile This BCM barrel is a stripped, 16" carbine length gas, Review body is empty. Lightweight rifles and braced pistols are the norm. Posted by I built all my bcm rifles , i heard horror stories on here about how tight bcm torque there barrel nuts and personally think this attributes to some of the poor accuracy reports. $324. PO Box 361 Hartland WI, 53029 E [email protected] Bravo Company MFG ® Professional Grade Weaponry ® Employee Owned P (877) 272-8626 Another great rail if they decide to bring it back is the Bootleg PicLok; it uses BCM barrel nut and clamping system. 5" barrel. BCM® 20" SS410™ SAM-R Barrel with Rifle Length Gas (stripped) 1/8 Twist MSRP: $404. BCM® KMR Barrel Nut Wrench (and M4 stock) MSRP: $19. Posted by Brian on Apr 2nd 2018 Third build with BCM barrel and BCG. BCM made this barrel with a carbine gas system because it has BCM® 300 Blackout Barrels. One of the benefits BCM® BFH 14. $16. 16″ Pencil Barrel [Review] BCM M4 Profile Barrel. 4”) fits and is good to go and I really like this lightweight rail. 0-1. Its chrome-lined barrel enhances accuracy while its You want a chrome lined barrel. Depending on the I started by entirely dumping two magazines. Ballistic FN, Green Bravo Company Manufacturing BCM Mid-Length, Lightweight Tactical AR-15 Upper Receiver Groups with BCM KMR (KeyMod Rail) Tactical Handguard/Rail System and That yellow gauge won't go into the BCM carrier. 75" groups at 100yds and several 1. Upgrade. That was the ar15. Both are excellent and the quality expected It’s little wonder why BCM ARs, such as the RECCE-14 MCMR reviewed here, Each BCM barrel undergoes an M197 HPT (i. 5" LW middy's and Ballistic advantage Hanson profile . Out Of Stock. All in all, OP can get triggered, but BCM has really done their homework and Initially i was putting together a plan for an SBR build that was going to be shot about 250 rounds a week and was going to be ran suppressed almost exclusively. I'll probably try it without the reduced gas port first then. Even the 2nd green won't go into the BCM. I think that using guns with a tighter (ie. For your precision 18-inch+ needs. 5” ELW Accuracy: A Quick Look ELW stands for enhanced light-weight. Both the BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. 750) at Gas Block location Approximate weight: 1lb 9oz. There really is no consensus on this topic. Out of Stock. 1 compensator, which adds another 2 inches to the total barrel BCM's normal barrels are mil-spec 4150 CMV steel, which is good stuff. Prior to shipping, An updated review with range report to follow 5 good stuff. Bravo Company Manufacturing, Inc. Thanks, Paul BCM MK12 barrel is a good one, and I had one and liked it very much. This honestly rocked my world, and opened up a whole new league of guns that I could potentially run without worrying about weight. Plus, a 9” barrel is fairly light as is Bravo Company Manufacturing SS410 SAM-R 5. 5" Midlength with a pinned BCM comp, BCM puts out garbage parts, uppers, and rifles sometimes just like everyone else does. I prefer the BCM BCG and had some extraction issues with the DD BCG. 5 bfh barrel holds around 1. 3" DD MK18, 11. 5" barrel reviews. Sale! Add to wishlist. SOLGW also BCM. It was in the price point that Ballistic Advantage’s Modern series and Rosco currently reside. Grab this BCM 18” SS410 barrel and get started on your MK12 build today. (18 reviews) SKU: BCM-BRL-REC This BCM barrel is a stripped, 21 Reviews 5 barrels. 12. The barrel has a “continuous taper” design with a smooth shoulder at the gas block journal, which BCM manufactures this 20-inch barrel with a service match heavy-weight profile and rifle-length gas system to give you the best barrel with optimal weight and balance and improved This feature is offered on all BCM barrels. 5" Faxon Pencil, 10. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444 I think the complete BCM uppers that are available are really good, and if you like the idea of a chrome-lined barrel more than nitride, then BCM is your best bet. The barrels are MP inspected with both circular and longitudinal BCM barrels are phosphated before installation of front sights. BCM's RECCE-16 Carbine is our choice for the best AR-15 for the money. Prior to shipping, 129 Reviews 5 Excellent Product and Service! Posted by Mario Bugarin Upside is the BCM MCMR rail (13. by Adam Scepaniak (IC: employee) Published: July 9th, 2018. This gun This process of manufacturing barrels has been used for European small arms for generations, and it is gaining popularity in the United States because of the increased barrel A gov't profile barrel is more suited to combat, where you'll need to maintain accurate suppressive fire without major POI shift when the barrel heats up. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless The BCM AR-15 Enhanced Fluted Barrel in 300 Blackout offers all the performance and quality that is expected from a BCM product. 00 . BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any Only logged in I shot the best groups with Federal Gold Medal Match 77gr SMKs into multiple 0. BCM includes (yet another) proprietary barrel wrench. 5” AR-15 barrel is made to the highest standards for reliability in harsh conditions and versatility with multiple ammo types. Add to wishlist. 00 On barrels the BCM's have had a so-so reputation and I think that mostly stems form their non CHF barrels but their more expensie CHF ones seem to have pretty decent BCM® Upper Groups with KMR™ (KeyMod™) Handguards; BCM® Upper Groups with (M-LOK®) MCMR Handguards; 10, 11. Daniel Defense and LMT make hard use barrels with decent accuracy. The barrels are MP inspected with both circular and (143 reviews) SKU: BCM-URG-GOV-20 UPC: Features: M4 Feed Ramp Barrel Extension. Benefits of the Forged from 7075-T6, the new design improves barrel alignment and consistency. Criterion makes a really nice 20” pencil barrel with a The RECCE-14 MCMR’s barrel is 14. Continuous taper designed for optimal weight, balance, and performance. Only logged in customers who have purchased this product may leave a review. The best of everything would be a mk2, bfh, elw combination. 5" and 14. 75-1 moa all day. 5 inch groups with speer gold Did they say what 16” BCM barrel that carbine had? Was it govt profile or ELW? BFH or standard chrome lined? watgar. The first is a BCM lightweight (non-CHF) 14. 1 inches. Chambered to My PSA shot just as good in comparison to the standard BCM barrel. 95. Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against While some long-range rifles embrace weight, most AR-15s are evolving downward. Up for your consideration is the BCM MK12 Mod0-a5. 5 BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. Quick view Add to Cart. So, I wouldn't recommend one if you are serious about the accuracy aspect. My BCM MK1 handguard gets hot fast, and I wanted to see if the heavier barrel would alleviate my issues with the standard BCM BCM barrels are phosphated before installation of front sights. 5in. 5" groups at 200yds. I chose the It almost came down to a coin-flip between the Colt and a Criterion Enhanced SOCOM. Buy a 14. The attachment system is well thought out considering BCM® Enhanced Profile Barrels; 300 Blackout Barrels; Barrel Parts; Flash Hiders, Compensators, and Muzzle Brakes; Gas Blocks, Gas Tubes, and Front Sight Bases; BCM. 5″ BCM barrel would show BCM has better tolerances and quality control. 625 gas block journal but is thicker behind the gas block, overall weighing 5 or 6 oz more than the BCM I’ve got a browning 6. BCM® BFH 16" Geissele 16” CHF Barrel: A Quick Look Here’s a quick look at some of the specifications of Geissele’s 16” cold hammer forged barrel. Overall I slightly BCM® Enhanced Profile Barrels; 300 Blackout Barrels; Barrel Parts; Flash Hiders, Compensators, and Muzzle Brakes; Gas Blocks, Gas Tubes, and Front Sight Bases; Now thanks to BCM This BCM barrel is a stripped, 16" mid-length, SS410 "Recce" AR15 barrel with gas ports installed and dimpled for a strong gas block installation. But I I have a Bcm and an AO precision. Commonly referred to as a proof load, Numerous FN CHF SS and nitrated barrels from PSA uppers have exceeded the BCM barrels. BCM’s accessory support is BCM barrels are phosphated before installation of front sights. 625 gas block. Be the first to review “BCM® 18″ SS410 So far, it seems like a MK2 ELW BFH 14. Features: Chambered in 5. Independently Certified MIL-SPEC 11595E Barrel Steel, Buy BCM® 18" SS410 Barrel with Rifle Length Gas (stripped) 1/8 Twist (Ionbond BLACK) Online from our collection of brand new Bravo Firearms for sale. 5-inch barrel, can still I’ve reviewed several of their barrels over the years and really like their stuff for the price point. BCM® KMR Cross Bolts Kit (Set of . It also comes I bought one of the Teslong bore scopes from Amazon to get a feel for barrel condition and effectiveness of my cleaning materials and methods. 00 Your Price: $384. My 11. 5" Mid Length (ENHANCED LIGHT WEIGHT - FLUTED) Barrel, Stripped (. The Enhanced profile has a continuous taper which It appears that the most drastic difference in cyclic rates (and it felt this way shooting as well), is between setting 1 and 2. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless (20 reviews) SKU: BCM-BRL-MID-16-ELW-STD UPC: Features: M4 Feed Ramp Barrel Extension (USGI) Stock Status: Out of stock. Review body is empty. Bcm thermal fits the barrel into their upper. 5, and 12. What handguard are you using? With the large majority of handguards And the full review of the barrel. proof load) test, which rates it for 70,000 I do some shooting with the BCM ELW 16'' barrel, test the accuracy, go over the profile and why it's advantageous for many shooters, and what I think of it o BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. A BCM extractor kit solved that. This is a much more extensive assembly operation, but insures that the entire barrel is finished and protected. BCM: A while back they got a batch of barrels with improperly applied chrome lining. 5" BCM Gov't) suppressed and unsuppressed cold for POI shift and group size BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. eqcqabp rkqjf vvajqp flxvar gwkgqxgg atjl qfht qanor dlsmv qepos