ZEV Technologies Slide Lock Charging Handle has a unique design that features smooth ambidextrous operation with fewer moving parts than any other charging handle on the market. It is machined from a single piece of 7075-T6 billet aluminum with a black hardcoat anodize finish for greater strength and durability. The handle also has a black nitride steel capture latch and is textured for superior grip and ergonomics. This model is designed exclusively for use with ZEV billet upper receivers. It not recommended for use with forged upper receivers.