Keystone Sporting Arms has a length of pull increase stock kit to let your Crickett rifle grow with them. Specifications and Features: Keystone Sporting Arms Cricket Spacer Kit 2 Crickett spacers 2 Long cap head screws 2 Short cap head screws Use the short screws and one spacer to increase your length of pull (LOP) by .75? Use the long screws and both spacers to increase your LOP by 1.5?. Polymer Black