PWS 9.75" 300BLK Upper PRIMARY WEAPONS - MK109 PRO RECEIVER AR15 COMPLETE 300 BLACKOUT

The Primary Weapons System long-stroke gas-piston upper receiver is one of the more-innovative developments to hit the AR-15 market in recent years, and now, you can get your hands on a unique variant of this system! The PWS MK109 PRO upper receiver chambered in 300 Blackout contains everything you need to get your AR-15 set up right. The PWS MK1 PRO line features the tried and true PWS long stroke piston system with the PWS Adjustable Gas Block. This line is perfect for shooters looking for a cost-effective piston system firearm without sacrificing the high-quality standards PWS has been known for over a decade.

Of course, this system features the unique, long-stroke system that Primary Weapons Systems upper receivers are known for, plus this system includes a few extras that make it a must-have! The PWS upper is a complete system, so you'll get a bolt-carrier group, as well as a Radian Weapons Raptor charging handle.

• Barrel length: 9.75 inches
• Overall length: 18.5 inches
• Weight: 3 pounds, 10 ounces
• All-black finish

Other features found in the PWS MK109 PRO upper receiver include a free-float, M-LOK handguard, an adjustable gas system and a short barrel equipped with an optimized 1:8-inch twist rate.