The KIDD .22 LR Receivers are set from KIDD to accept these upgraded threaded receiver pins. The pins stabilize the trigger guard to greatly enhance stability.
Our receiver pins with threaded ends need the receiver to be countersunk with an 82 degree countersink tool. If you are trying to upgrade a receiver that is not produced by KIDD then you will need to countersink the receiver pin holes. We do offer a kit that includes the pins and countersink.