Our 'BUC' Blank Bullet Trap Firing Adaptor is specifically designed for increasing safety during tactical training with blanks. Advantages: Prevents Accidental Live Round Discharge Easy to Assemble Improves Gas Retraction when Blanks are Used Physically Blocks (absorbs) up to 3 Accidentally Discharged Rounds Improves Safety, Saves Lives Compatibility: Single pattern stripe: M-16 / AR-15 Models Standard Flashhider Dual pattern stripes: TAR-21 (IWI Tavor) Standard Flashhider