1) Sureshot USA M4 Stock Adapter for 4.5mm trunnion pin $100 shipped 2) JMAC 2C 24-1.5 Facemount X37 Muzzle brake for HUB 1.375-24 threads $90 shipped 3) CNC Warrior Type 84 style birdcage flash hider 14x1L $35 shipped 👍🏼 1 😲 1