Gate Custom CNC Aluminum 1A1 Bolt Catch for M4/M16 Airsoft AEGs, Black

A bolt catch is the small lever on the left side of an M4 that locks the bolt open when you empty a magazine. It's the difference between a tactical reload and fumbling with the charging handle. This Gate 1A1 bolt catch replaces the flimsy factory piece with a precision-machined CNC aluminum part that holds its position under use.

CNC aluminum construction. Gate machines this from solid aluminum stock, so the pivot hole stays true and the lever doesn't develop play. It's a small part, but it's one you touch constantly during reloads and inspections.

Compatibility and fit. This fits M4/M16 AEG platforms with a standard receiver cut. Gate parts generally run tight to spec, so some fitting may be needed depending on your lower receiver. It's not a universal drop-in guarantee, but it should seat cleanly on most quality lowers. Installation requires removing the bolt catch roll pin and lever — you'll need a pin punch and a steady hand.

What you get. Just the bolt catch itself. Hardware, tools, and installation help are not included. If you're not comfortable working with roll pins, budget for a gunsmith visit or watch a few M4 disassembly videos first.