Check the listing for details. KIDD V-Block with Screws Aftermarket Part for a 10/22® or Ruger® 10/22® -Black. Condition: New. Listed at 30.50 USD. V-Block for the 10/22® receiverSlightly longer for increased stabilityMore support for the screws KIDD Innovative Design has produced a machined from billet aluminum v-block with installation screws ready to hold your slip fit barrel securely onto your 10/22® receiver. Slightly longer than the factory v-block to give an increased bedding surface. Also our v-block has more support for the v-block screws for increased stability in your rifle. At times customers ask why we don't offer an adjustment screw. To answer that question, we feel it is important that the barrel fit properly without disturbing the harmonics with such an adjustment. This adjustment will likely negatively impact the accuracy of the barrel. Not compatible with the following barrel makers due to their smaller than factory v-block slot in their barrel: Green Mountain 10/22® barrelsAdams and Bennett 10/22® barrels Packaging includes:black v-block with two mounting screws