.177-.22 CRAFTSMAN SERIES TUNE KIT
A complete kit for the .177 and .22 Craftsman series guns. Complete with valve spring, hammer spring, hammer spring adjuster and valve o-rings.
Use the supplied valve spring if your gun likes pellets up to 18g. If your gun shoots heavier pellets or slugs omit the valve spring.
This setup will typically yield 80+ shots using Crosman premier 14.3g @ 880fps.