Amend2 Magazine, Mod 3, 300 Blackout, 30 Rounds, Fits AR-15 Rifles, Polymer, Black AM300MOD3BLK30 Whether you're facing scorching heat or freezing cold" the Mod-3 is designed to handle it all. No compromises" just performance you can rely on. Amend2 put the Mod-3 through rigorous testing to guarantee its resilience. From extreme temperatures to high-impact and high round count scenarios" these magazines are built to exceed your expectations.