Our New Vented Stone Krusher Flat Spiked extension for the AR15, Nak 9, & other barrels in 1/2x28 threads. For door breach, defense and barrel counterbalance. This machined aluminum vented extension is finished in flat black anodize, 7 inches in length, 1.125" in diameter and weighs about 9 ounces. May Be used to reach compliant barrel length if pinned and welded. 1.125" in diameter. *** This fake suppressor will add length to the barrel. All rifles and pistols with 1/2x28 barrel threads. For .22LR, 223, 5.56, 9mm up to .45 acp.
