This BCA 18" Mlok SOCOM Stainless Complete upper consists of a 18" stainless steel, spiral fluted Barrel with a 1:7 twist, housed in a 15" Mlok rail. It is chambered as a .223 WYLDE / 5.56 Nato with a mid length gas system. The upper receiver is assembled with our BCA M4 Flat top upper receiver and the standard bolt carrier group and charging handle are included. Pair this upper with our BCA lower assembly for your ideal AR15 rifle.
BCA DOES NOT recommend using steel cased ammo in our Assemblies or Rifles.
|Thread Pitch||1/2 x 28|
|Gas System||Mid Length|
|Gas Block System||0.750|
|Gas Hole Diameter||0.085|