The PW MK1 MOD 2-M line features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok technology on the free float handguard, users are able to mount either Picatinny or MLOK accessories on the front of their firearm. This upper features a 11.85" barrel, a Radian Raptor charging handle, and is chambered for 223 Wylde.