You take it to a trained gunsmith for evaluation and repair.
The first production semi auto pistol was the Mauser c/96 "broomhandle" pistol.
Semi-auto requires the hammer to be cocked for the first shot.
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It's semi auto not full auto.
In order to tell how old your Colt 25 semi auto pistol is, you will need to offer the serial number. This number gives you an idea of when the pistol was manufactured.
They refer to this handgun as the browning model BDA (browning double action auto) pistol.
http://en.wikipedia.org/wiki/J_C_Higgins Hope This Helps Answer your Question.
225
Revolver or semi-auto?
only a pistol is an semi-automatic. revolvers are not semi auto. A "pistol" is a generic term to refer to ANY handgun, revolver or Semi-automatic. Wrong! Only some one completely unfamiliar with hand guns nomenclature would call a revolver a pistol. A revolver is commonly referred to as: "revolver, wheel gun or shooter (short for 6 shooter)." A semi automatic is commonly referred to as: "semi auto or pistol."