Twitter 上的 Rollo Davies F.ISRM MSyI:"Not security related but I wanted a project so I'm customising & tuning a CO2 Crosman 2240, 22 pistol. If you're interested in my mods, let me
Crosman Upgrade Hammer Spring Guide to Fit 2240 2250 - Etsy
SALE ADJUSTABLE TRIGGER SEAR SPRING UPGRADE for Crosman 2240 2250 1740 1377 1322 | eBay
Wimpier Hammer Spring for Crosman 2300? | Airgun Talk | Airgun Warriors Forum
Post #2... Modifaction #1 - Sear Spring Adjuster "Tuning" Mod - Alchemy AirWerks
Crosman Set of four different strength Hammer springs.
Another Airgun Blog: Installing Crosman's Two-Stage Trigger on a 22XX -- Part 1
ADJUSTABLE TRIGGER SEAR SPRING for Crosman 2240 2250 1377 1322 etc | eBay
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Crosman 2240, 2260, 2250 POWER hammer spring with guide, 10 % power increase | eBay