Tough metal constructed parts to withstands wear Excellent as replacement parts for M1911s Compatible with all Double Bell M1911s Features a reinforced hop-up unit Extras consist of beavertail grip safety, sear and barrel guide In the Box 1X Hop-Up 1X Beaver Tail 1X Barrel Guide Grip Safety 1X Sear Specifications: Brand Double Bell Compatibility Double Bell, Western Arms, WE, Marui Build Full Metal Weight 2.3 oz Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov