FEATURES:-Designed to make your RugerA(R) 10/22 rifle lighter & significantly more accurate-Accuracy is enhanced by a rifled chromoly steel liner w/ a polished 11 degree crown-Weight: 18 oz-Length: 16.5"-Outside Diameter: .920"-Threads: 1/2" x 28-Twist: 1:16"-Matte BlackPRODUCT SPECIFICATIONS:Dimension 2.05 X 3.10 X 20.00Height 2.0500Width 3.1000Length 20.0000CALIBER 22 LONG RIFLEFINISH BLACK MATTELENGTH IN INCHES 16.5000SIGHTS YFLUTED YTHREADED NOTHER FEATURES: MATTE BLACK BARREL, THREADED BARREL, 1/2X28" THREADS, 1-16" TWIST, .920" OUTSIDE DIAMETER 6061-T6 ALUMINUM WITH CHROMOLY STEEL LINER, INCLUDES THREAD PROTECTOR, ADJUSTABLE REAR SIGHT, FIBER OPTIC GREEN FRONT SIGHTNO DIRECT SHIP TO CALIFORNIA