I have a gun at home that I think might be what you guys are looking for. If you look on the left side of the handgun there is a knob that sticks out in the back of the pistol. 1.) you pull back the slide [as if kocking the gun] 2.) hold the slide back and press in the knob in the back of the gun. 3.) pull upwards while doing steps 1 and 2 and the slide should come off. TO TAKE OFF THE BARREL 1.) turn it to either the left or the right only one way works but i forget which way it is. from then on YOU ARE ON YOUR OWN
See the links below for the owners and parts manuals.
Unless you have experience or an exploded parts diagram, don't do it. Go to a gunsmith and have them show you how.
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Good detail strip and reassembly videos for series 80 1911's and some good tricks to put those tricky parts back in!
If you go to Brownings Home page you should be able to get some technical help.You could also contact Browning,s Parts and service dept at 1-800-322-4626.
See the link below for the parts manual from Crosman.
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gunparts.com
A place which carries parts for that pistol, presumably. We'd be happy to direct you to such a place, but we can't, since we have no idea what the make and model of your pistol is.
Frame barrel hammer
Depends on which parts, for which pistol. A good start would be your local gun shop. You may be able to order parts from the manufacturer, or gunpartscorp.com. Some parts can be installed by the maker, but are not sold to others because of the need for fitting.