18" Government Profile .22 Upper (w/Low Pro Railed Gas Block)
Limited Run, While Supplies Last!
.22 Evolution Sierra Dedicated Upper
The Sierra .22 Caliber AR-15 upper maintains compatibility with all the same parts and accessories that fit your full caliber AR's, including the lower receiver.
Comes with non-functional forward assist plug. May be upgraded to fully functional forward assist by upgrade below.
Black Phosphated .22LR Action
18 inch W.A.S.P. steel barrel
1:16 inch twist
Carbon Steel Barrel
Mil-Spec 1/2x28 threaded muzzle
Piccatinny Railed, Low Profile Front Sight Base
Live Round Extraction
Anti-Jam Charging Handle
Firing Pin retained by standard AR15/M16 Cotter pin
