6061 T6 Aluminum
Type II and Type III Hard Anodized
100% LIFETIME WARRANTY
No batteries, electronics, or keys needed
"Try your AR-15 CHAMBER LOCK RISK FREE for 30 days. If you're not satisfied for any reason, you may return your order for a full refund." - Dylan Ervin, Founder
Compatible with Mil-spec AR-15 Uppers.
May have compatibility issues with some PSA Uppers.