Powder River Precision PRP V-Block for Ruger 10/22 & Clones Red Ruger 10/22 and clone models. Given the popularity of Aluminum barrels and that most receivers on the market are Aluminum we thought it important to make a V-Black that would not damage your barrel or receiver if accidentally over-tightened. Our V-Block is a direct replacement part. It is made from 6061 Al and hard anodized. It is designed with a self aligning feature so the angle of the barrel dovetail and the angle of the v-block match precisely. The kit includes two 12-24 bolts 2 washers and one V-Block. 23 inch/lbs torque spec is clearly engraved on the bottom of the part. Package Contents: Powder River Precision PRP V-Block Powder River Precision PRP-VBKR: PRP V-Block for Ruger 10/22 & Clones Red Ruger 10/22 and clone models