it is an old design compared to say glock were you just pull on the pin with spring instead of pin coming out. it was a little hard first time i field stripped one.
i still like the thin single stack and grip but prefer a modern 9mm with high capacity rather than 7 round .45.
dont get me wrong i love a good 1911 but the military did replace prob. for reasons i mentioned. caliber and capacity?
just take to gun smith and get new pin and shoulx work like a charm.