GC_UPC TACTICAL SOLUTIONS Pac-Lite 4.5" TB fits Mark I/II/III and 22/45 ODG MAP PL4.5TENF-04 show more like this Most Firearms ship for FREE KyGunCo GC_UPC Tactical Solutions Pac-Lite 4.5" Threaded Barrel .22 Long Rifle Ruger 22/45 and Ruger Mark Series Pistols OD Green Finish $262.72 PL4.5TENF-04 show more like this 19.95 Cheaper Than Dirt GC_UPC Tactical Solutions Pac-Lite OD Green .22 LR 4.5" Barrel for Mark I, II, III and 22/45 $270.99 PL4.5TENF-04 show more like this 9.99 GrabAGun.com