Browning Citori spring and firing pin replacement – rifleshooter.com
Scheutzen/Caspian 9x23, main/hammer spring - 1911-style Pistols - Brian Enos's Forums... Maku mozo!
Amazon.com : bbtac m21 airsoft 260 fps metal spring pistol with working hammer and saftey grip(Airsoft Gun) : Metal Spring Bb Gun Automatic : Sports & Outdoors