FEATURES:-1/2x28 threads-Designed specifically for the 26x1.5 left hand thread on the muzzle of the Yugoslavian M92 & M85 Krinkov rifles & PAP series of pistols-18 ports distributed around the upper 270Adeg of the device help stabilize & reduce exiting gas pressure-Will clear any projectile up to .311" in diameter-Machined from 8620 steel-BlackPRODUCT SPECIFICATIONS:Dimension 2.10 X 2.85 X 4.90Height 2.1000Width 2.8500Length 4.9000TYPE/COLOR MUZZLE COMPENSATORSIZE/FINISH 26MM/BLACKMATERIAL STEELOTHER FEATURES: 26X1.5LMM THREAD FOUND ON MOST YUGO M92 AND M85 KRINKOV RIFLES AND PAP SERIES PISTOLS, PROJECTILE UP TO .30 CAL, 2.125" INCHES LONG MADE IN USANO DIRECT SHIP TO CALIFORNIA