Fantastic piston upper - Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver

Some clarification for the consumer, the listed muzzle device is a little unclear. It IS an omnidirectional two port brake with Plan B compatibility. It has a wider bore over 556, but a good functional device nonetheless. In terms of a piston upper, this long stroke is arguably better than most short stroke pistons out there. Compared to the 516 G2 and Legacy MCX, it has a few advantage points. 1) The piston tube. The piston itself is nearly completely enclosed in a tube inside of the handguard. There is only a few small holes to bleed gas. This protects the piston from the environment and debris. Most short stroke pistons are completely exposed besides the handguard. 2) No additional springs. Nearly, if not all, short stroke pistons require an additional spring on the piston assembly. This long stroke piston design utilizes the buffer spring instead of a proprietary part. This significantly adds to the longevity of the product. Overall, the recoil is very light, it is less than short strokes of the same length and on par with tuned DIs, additionally my complete build weighs only 8 pounds with can and optic. It has very little gas in face when used suppressed. I highly recommend it.