FEATURES:-For 9mm AR builds-1/2-28 threading-Core & cap are machined from 416R stainless steel & black nitrided while the sleeve is made from titanium.-Timing & tuning is done w/ the titanium sleeve, no shims or crush washers needed-Length:2.5"-Weight: 3.9 ozPRODUCT SPECIFICATIONS:Dimension 1.45 X 4.25 X 8.15Height 1.4500Width 4.2500Length 8.1500TYPE/COLOR COMPENSATORSIZE/FINISH BLACK/STAINLESS STEELMATERIAL TITANIUM/STAINLESS STEELAR-15 ACCESSORY YOTHER FEATURES: TITANIUM SLEEVE, ISONITED 416R STAINLESS STEEL, 2.56" LONG, 3.9 OZ, 1" DIAMETER FOR 9MM AR BUILDS, 1/2-28 THREADINGNO DIRECT SHIP TO CALIFORNIA