UTG Gen II Model 4 Carbine Blank Firing Adaptor GI Blank Firing Adaptor for Carbine Length Model 4, 15, 16; Fits Standard A2 Flash Hider and Barrel. Made from High Strength Steel Alloy with Precision Manufacturing Robust User-friendly Ring for Handy Carrying and Operation Durable Standard Yellow Paint for Long-Term Protection and Distinction Field Tested to Deliver Most Excellent Performance, Most Demanded Part for Law Enforcement/Military Training