I recently purchased one of the above-named kits with the 18 1/2 # recoil spring to put in my 1977 Colt MkIV Series 70. This pistol has been lightly modified (High profile sights, ambi safety, but no appreciable interior work). The recoil spring may very well have been the original spring that came with the pistol.
When I installed the recoil spring from your kit (along with a very lightly used Pachmyer (?) shok buffer) I experienced a problem. When I lock the slide back, insert a loaded magazine (dummy rounds), and then release the slide, about 75% of the time the hammer follows to the half cock notch.
Based upon this somewhat limited information, can anyone make a guess as to what may be happening with my pistol?
When I installed the recoil spring from your kit (along with a very lightly used Pachmyer (?) shok buffer) I experienced a problem. When I lock the slide back, insert a loaded magazine (dummy rounds), and then release the slide, about 75% of the time the hammer follows to the half cock notch.
Based upon this somewhat limited information, can anyone make a guess as to what may be happening with my pistol?