Geissele Automatics Super Duty Nano

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 14.5" Pinned and Welded HBAR Barrel M-LOK Black

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Heavy Barrel .750 Gas Block M-LOK Desert Dirt

Geissele SSA-E X Super Semi Enhanced AR-15, AR-10 Two Stage Trigger

Geissele Automatics AR-15 SSA-X 2-Stage Trigger

Geissele SSA-X Super Semi AR-15, AR-10 Two Stage Trigger Curved