I also highly recommend an adjustable Super Sear for the trigger and a hammer spring adjuster for both guns. I recommend the flat top valve and piston assembly and a metal barrel band for the 1377/1322. Go easy on increasing the port size and volume in the 1377/1322 valve as it will require additional pumping and a little more volume goes a long way. Find many great new & used options and get the best deals for Crosman Pc77 1377 to 1322 Conversion Kit With. With a hammer spring adjuster installed either spring should probly be OK on Co2. The longer barrel was the place to start.Ī 1377 spring in the 2240 would be good if you were running at PCP pressures otherwise you will likely be wasting some gas.
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