ZEV 11.5-inch SBR with Grey Geissele MK4 Federal Rail

A first NFA build that started as a semi-budget HRT clone: a Form 1 SBR on ZEV forged receivers with an 11.5-inch Ballistic Advantage barrel under a grey 10-inch Geissele MK4 Federal rail. A Sig Romeo 5 on a LaRue mount co-witnesses with a Daniel Defense fixed front sight and Magpul MBUS rear. BCM lower parts, a Maxim CQB stock, a Magpul AFG and a Streamlight HL-X round it out, and the builder reports about 1,200 trouble-free rounds.