This aftermarket Ruger® Tactical quad rail with weaver/picatinny rails is compatible with your Ruger 10/22 original factory wooden stock. The tactical quad rail upgrades your Ruger 10/22 rifle with a black hard anodized aircraft grade aluminum quad rail, and the design offers plenty of picatinny rail space to mount tactical accessories to your rifle like laser sights, bipods, vertical grips, red dot sights, and scopes. The T-marked rails allow accessories to be removed and replaced with ease. Length: 15". It accepts all standard Weaver/Picatinny 1913 accessories. This product is only compatible with the original factory wooden stock. It may fit some synthetic stocks with the same dimensions, but we cannot guarantee it. Picatinny rail covers are included.