This kit is to convert a semi-automatic hand-gun, such as the Colt model 1911A1, into a hand-gun of increased round capacity from the original seven-round to thirteen round by replacing the conventional frame, magazine, magazine catch, grip covers, and trigger assembly by new similar parts, while still retaining the remaining parts of the hand-gun, including the slide, barrel, breech block, firing pin and hammer mechanism, manual safety catch and take-down latch.