Primary Weapons System MK111 MOD 1-M Semi-Automatic .223 Wylde AR-15 Pistol, 11.85" Barrel, 3-Setting Adjustable Gas System - 20-M111PA1B

Primary Weapons System 20-M111PA1B: One of PWSs more budget-friendly models, this rifle upper uses the same long-stroke adjustable piston system found on their other rifles, just with a standard M-Lok rail instead of their Pic-Lok rail. Make no mistake; this is still a great upper, extremely reliable, and robust. The FSC muzzle brake is excellent at keeping both muzzle rise down and flash suppressed. The barrel is 1:8 twist which has been found to keep most bullet weights stable during flight. The 7" M-Lok rail is their design, and very sturdy, capable of keeping IR devices and iron sights zeroed in all situations. With enough room to mount all your other necessary accessories as well.