![]() ![]() Even so, I think the cartridge has a lot of potential. I think a dedicated design will be required. While 7.62x39 AR magazines function with 9x39 ammunition, I would not term them 100 percent reliable. 300 BLK at 1,000 fps develops 462 ft.-lbs.Īll is not roses, though. ![]() With a muzzle velocity of 1,073 fps it develops 711 ft.-lbs. My LabRadar clocked one with a muzzle velocity of 1,060 fps, which dropped to 1,045 fps at 50 yards and 1,008 fps at 100 yards. The heavy 278-grain boattails appear to be fairly efficient. Velocity averaged 1,073 fps from the 10.5-inch barrel, and the ammo had a standard deviation of 7.7 and extreme spread of 27. Accuracy for four five-shot groups from the bench at 100 yards averaged three inches, but Krebs said he wasn’t satisfied with that level of accuracy and plans to switch to a faster rifling twist. Extraction and ejection were flawless, so it appears Marc Krebs has his gas port location and size correct. Did I say it is fun to shoot suppressed? This thing will put a smile on your face.Įven though my sample was a pre-production gun, it performed well. Making rapid multiple hits on a silhouette at 100 yards is easy. It hits with a solid “whop” and smacks the target noticeably harder than a 230-grain. The impact of the 278-grain FMJ slug on steel at 50, 75 and 100 yards is impressive. Recoil is mild, but the gun has some muzzle rise between shots. It is pleasant to fire and be next to-even with no hearing protection. With a SilencerCo Osprey 45 suppressor fitted, the 9x39 is almost movie quiet. So what is a 9x39 AR actually like to shoot? It is incredibly fun, especially suppressed. Currently, there are a number of companies working to bring AR-15 barrels, upper receivers and complete rifles to market in this caliber, and one is Krebs Custom, a company best known for its custom AK work. 447-inch base diameter and 2.2-inch overall length, it happens to fit into an AR-15. It first saw combat in Chechnya and has proven to be highly effective.ĭue to its. The 9x39 is a dedicated subsonic cartridge for use in specialized suppressed weapon systems. Basically a necked-up 7.62x39 but with much less taper, the 9x39 is a Russian military cartridge developed because of dissatisfaction with the terminal performance and penetration of 200-grain full-metal-jacket 7.62x39 subsonic ammunition. 300 BLK has led to interest in subsonic loadings in other popular cartridges, and now there’s a new one on tap: the 9x39. 300 BLK-a soft-shooting cartridge in subsonic form that has become a sort of ambassador for introducing many shooters to the benefits of both subsonic ammunition and suppressors. Subsonic ammunition is much more comfortable to fire, hence the popularity of the. As sound suppressors continue to grow in popularity, so does interest in subsonic ammunition. ![]()
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