Description As of April 2026, allow 5-10 days for this item to be built and shipped. Comes standard with 6061 M4 style upper receiver, stainless barrel, flash hider, black carbon steel gas block, bolt/carrier and charging handle. Ready to fire on your lower. This unit comes standard with a Flash Hider but you may choose to Install a Muzzle Brake or Radial Comp instead of the standard Flash Hider. Optional heavy duty Tromix 7075 billet upper receiver is also available. Available in 10.5″ (carbine gas system 1:10 twist), 17″ and 21″ barrel lengths with mid-length gas systems 1:12 twist, .750″ gas block journals, and 5/8-24 muzzle thread. SB 704 applies to all California sales – Must ship to FFL.
