Mk12 Mod0 suppressed (BCM vs. PRI) Special Forces rifle + MK262 ammo + AEM5 - accuracy review

today we discuss a global war on terror era classic that has garnered a cult following unlike any other... the Mk12 Mod0 special purpose rifle we pit an original factory PRI rifle upper for an accuracy challenged against the BCM reproduction we also test our equipment with some of the most popular 75 to 77 grain ammunition to include the venerable military issued Black Hills Mk 262 mod1, IMI razor core, MagTech and Hornady Black finally we test the OPS Inc, or Allen engineering suppressor for its effects on the weapons platform's accuracy so charge your glasses, and strap in for this nine hole review on the Mk12 Mod0 In the early 2000s while Soldiers and Marines were still advancing through Iraqi streets with iron sights M16s, SOCOM had started developing a concept for a lightweight, modular, accurate, and nimble designated marksman system for the next generation's issue... the mark 12 system was built around the black hills Mk262 77grain 5.56 nato cartridge... the 77 grain projectile had a higher ballistic coefficient and out-performed other 5.56 cartridges in terminal ballistics and flight characteristics the mark 12 SPR was initially designated as a special purpose receiver, and to be only issued with the upper receiver, however, with a surplus of M16A1 lower receivers and butt stocks in inventory, CRANE began to issue the Mk12 Mod0 as a complete rifle with A1 lower halves, the Mk12 Mod0 was most recognizable for its PRI carbon fiber free floated handguard. The Mk12 Mod0 is far more rare in general service and closely associated with a US Army's 5th Special Forces Group, but the rifle is rare for a reason... early adaptations for the rifle had interface issues between ARMS and PRI parts. PRI currently manufactures a MK12 Mod0 complete rifle or upper receiver... that is widely popular within military rifle reproduction enthusiasts. In 2012 BCM also released their copy of the Mk12 Mod0 system without the ARMS rail on top. The BCM is deemed less desirable than the PRI variants to collectors and uses a 1:8 twist stainless barrel Today we have a PRI mark 12 upper receiver on an A1 type lower that resembles an issued Mk12 Mod0 more closely with a swan sleeve, shooting against a BCM Mk12 Mod0 upper on a Colt M4 marked lower. The BCM lacks a swan sleeve to decrease unnecessary weight, and uses a LaRue LT158 mount that adds 10 MOA elevation for long-range shooting both rifles one identical Vortex 2.5-10x32mm Vortex 2.5-10x32mm scopes to duplicate the functions of the issued Night Force scope for those who complain that we aren't using issued optics... we get it. We have Night Force and US Optics scopes on other rifles and appreciate quality optics. That said, the Vortex seen here is not the limiting factor for this setup to reach 800 yards. Both rifles also have match grade triggers installed all targets were shot at 100 yards the rifles were alternated between the nine-round groups for barrel cool-down intervals and the environmental between the shot groups were entirely the same so how did we do? With the IMI colorbox the BCM won by a four percent smaller nine shot group at 1.7in the IMI brown box was the worst-performing ammunition and the PRI won out by a 15% smaller nine-shot group at 2.3in. MagTech yielded the best group of the day with the BCM printing a 1.3in nine-shot group that was a 48% smaller than the PRI's group the Mk262 was a little disappointing with the PRI barely winning out with a 1% smaller nine-shot group at 2.2in in the past we've seen the Black Hills 77grain TMK target loads to compare much closer to the 1.2 MOA nine-shot group range finally Hornady Black 75 grains was a win for the BCM with a nine-shot group that was 6% smaller at 1.98 inches, the BCM narrowly wins out at a 4% smaller average group size when compared to the PRI now we notice that our group sizes seemed a little bit higher than what some people of the internet reported... to dispel any doubts and to learn about the effects of the suppressor we took the BCM back to the range and tested for a point of impact shift with, or without the suppressor... it was a different day and I well rested now and shot from a shaded position. one of the first things anyone would notice while shooting the AEM 5 is how quiet it is the ops Inc suppressor was a major design adaptation to the Mk12 system the break and collar on the Mk12 is one of the most distinctive features that separates a rifle from the rest. Years after Ops Inc went out of business Ron Allen from Allen engineering continued the manufacturing of the AEM5 suppressor this suppressor is known for its zero point of impact shift meaning the rifle will impact on the same location whether suppressed or unsuppressed the results... were staggering. Indeed there was no point of impact shift the black hills Mk262 group size was 37% smaller when suppressed at 1.7 inches the magtec's group sizes were actually almost exactly the same at 1.3 inches the IMI brown box was just as horrid as a first test, but the suppressor did manage to decrease a nine-hole group size by 51% and ended up at 1.9 inches the IMI color box had a 37% group size reduction from the suppressor yielding the tightest nine-hole group of all of the tests at 1.28 inches, which most of the rounds actually fall into a 0.9 inch group Hornady black also benefited from a 22% group size reduction where the suppressor attached yielding a 1.62 inch group when comparing the results between the two days there was less than a 4% variance between the unsuppressed BCM uppers group sizes suggesting that both the shooter and the equipment were consistently performing when we took the BCM Mk12 Mod0 to the practical accuracy range, we were even able to hit 800 yard head size targets in strong winds despite the projectiles lacking energy the 77 grain 5.56 bullet still retains about the same energy as a light .38special would have at a point-blank range we also observed that the bullet drop out to 600 yards away was very comparable to a 175 grain 7.62x51 projectile, although the wind drift was significantly more... one problem however is that BCM cut the barrel dimensions incorrectly since the original step for the BCM suppressor collar was cut too shallow the suppressor was not locking in tight in recommended 6-8 turns, but rather 4 turns. I had to work with Allen engineering directly to get a custom barrel collar made for the suppressor to time correctly. The PRI uses the original Douglas Barrel and has no issues now that was a lot of data... let's try to break it down for a few conclusion points ONE, the BCM handedly beat the PRI in the accuracy Department when fed with MagTech. The tightest group that the PRI was able to obtain was 1.76 nine-inch group with IMI colorbox... 35% larger than the BCM's unsuppressed with MagTech's at 1.316in TWO, the AEM five suppressor gave us a 30% decrease in average group sizes with no point of impact shift. an interesting observation was how the suppressor changed the casing ejection pattern and that the PRI gas Buster charging handle on a rifle worked flawlessly to vent excess gases away from the shooter when suppressed In fact, rounds from the magazine turn from this... into this. That's from all that back pressure. unsuppressed... these are suppressed See the difference? THREE. Magtec's 77 grain ammunition was the most consistently delivering accurate ammunition with an average between all tests at 1.47 inches, it yielded an 11% to 65% decrease in average group sizes when compared to any of the other a munitions tested while the IMI colorbox yielded the tightest group in while suppressed we cannot easily recommend it the IMI color box gave us a 50% tighter group size than the brown box ammunition as there is too much variance between different lots at the end, the Knights Armament Mk12 Mod1 ultimately became the issued rifle as KAC did not have fitment issues the Mk12 Mod1 even turned into a general issue rifle for Marines to some collectors, the BCM would never even be a choice of purchase because it does not use all of the original PRI parts for us we are perfectly happy with the sound of a struck steel plate at long distances under the puff of an efficiently suppressed rifle... we'd love to hear your thoughts about our test feel free to send us pictures of your Mk12 for us to re-post on our Facebook page. We also encourage you to send us your nine-hole groups shot at 100 yards as a comparison between our variants and yours thanks again for tuning in and we'll see you on the range!

Channel: 9-Hole Reviews

Views: 807,181

Rating: 4.9288416 out of 5

Keywords: mk12mod0, mk12, mod0, mod1, modh, BCM, bravo company, bravocompany, ar15, rifle, sniper, target, designated, marksman, dmr, vortex, larue, ARMS, PRI, lone survivor, navy, seal, axe, ranger, long range, mk12modh, imi, razor core, 77grain, mk262, accuracy, review, special forces, SF, green beret, ArmA, battlefield, modern warfare, call of duty, medal of honor, M110, SCAR, SCAR17, PRS, PSG1, dragunov, svd, afghanistan, iraq, afg, oef, enduring freedom, iraqi freedom, operation, gwot, global war on terror, army, USArmy, PUBG

Id: q3vCPoCNBjU

Length: 11min 16sec (676 seconds)

Published: Thu Oct 18 2018