Durable, metal construction for a long lasting handstop Compatible with M-LOK handguard rail systems Prevents your hand from slipping off handguards Lightweight design keeps from adding weight to your airsoft gun In the Box 1X Handstop Specifications: Brand G-Force Build Aluminum Alloy Compatibility M-LOK Handguards Length 4.5 Width 0.75 Color Red California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov