Actually I'm doing a Catamount Fury 2 conversion. I've purchased the entire jP recoil spring performance reliability kit and the thicker stanless shaft's diameter is to thick to allow the Catamount Sheild (Pictured) in post to slide into too. Figured the Saiga 12 dust Sheild would be sized right to allow the proper fit. www.carolinashootersuppluy.com suggested to drill out the ring/housing on the Catamount dust Sheild. But just not enough wall. Any help appreciated