16” 5.56 NATO barrel

41V50 Chrome Moly Vanadium Steel

Mid-Length gas system

15” free float M-LOK handguard

7075-T6 aluminum forged receiver

A2 flash hider

The Sionics Weapon Systems Patrol III AR-15 Barreled Upper Receiver features a 16” barrel chambered in 5.56 NATO with a 1:8 twist rate and Mid-Length gas system. The barrel is machined from 41V50 steel and magnetic particle inspected. The 15” free float handguard features M-LOK attachment slots and a full length picatinny top rail. The upper receiver is made from 7075-T6 aluminum forgings and hardcoat anodized. It is assembled with dust cover and forward assist, but charging handle and BCG are not included.A SIONICS Weapon System is a firearm that is more than just built from the ground up by master gunsmiths for professionals in the field. They're more than just an assembly of quality components. Every firearm built by SIONICS has been carefully crafted from the best components available by a single master gunsmith before a second master gunsmith puts it through a 19-point quality inspection and test firing process to ensure that ever SIONICS firearm has been built without compromise.