The Gun Digest Book of Tactical Weapons Assembly/Disassembly. J B Wood

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Data:	Colt Model 1911
Origin:	United States
Manufacturer:	Colt’s ManufacturingCompany, LLCHartford, Connecticut
Cartridge:	45 ACP, 38 Super,9mm Luger
Magazine capacity:	45—7 rounds 38/9mm—9 rounds
Overall length:	8 inches (Commander—8 inches)
Height:	5 inches
Barrel length:	5 inches (Commander—4½ inches)
Weight:	40 ounces

      Our standard military pistol from 1911 to 1985, the Colt 45 Auto is so well known that it really needs no comment or background data here. The target model, the Gold Cup, has one or two small differences in the internal mechanism. The Series 80 versions have an added firing pin block safety system, consisting of a lever in the frame and a plunger and spring in the slide. These are not complicated, and should cause no takedown problems. The old Government Model has also been copied many times over the years, and the instructions will generally apply to all of these.

       Field Strip:

      1. With the magazine removed and the hammer down, depress the checkered button below the barrel and turn the barrel bushing toward the right side of the gun until the plug and recoil spring are free to come out. CAUTION: The recoil spring is under tension, so keep strong pressure on the checkered end of the plug and ease it out. The barrel bushing can ordinarily be turned easily with the fingers, but on some tight older guns, and especially on the new Mark IV Series 70 guns with the barrel-gripping bushing, a special wrench may be necessary.

      2. After easing out the plug, remove it from the end of the spring. In rare cases, it may be locked on by an internal tab, and a slight turn will be necessary to free it.

      3. Cock the hammer, and move the slide back until the small semi-circular cut at its lower edge aligns with the top rear of the slide stop.

      4. Push the end of the slide stop shaft, on the right side of the gun, and remove the slide stop from the left side.

      5. The slide assembly can now be run forward off the frame.

      6. Remove the recoil spring and its guide from the slide, together or separately.

      7. Turn the barrel bushing back toward the left side of the slide, until its lug aligns with the opening, and remove the bushing from the front of the slide.

      8. Tip the barrel link over forward to clear the recoil spring tunnel.

      9. Remove the barrel from the front of the slide. Gun is now field-stripped.

       Colt Mk IV/Series 70 field-stripped

       Detail Strip:

      10. With a tool of appropriate size, depress the firing pin and slide the retainer downward to free the firing pin. CAUTION: The firing pin spring is under some compression, and can eject the firing pin with force when the retainer is removed.

      11. After the retainer plate is removed, the firing pin and its return spring can be taken out.

      12. Removal of the firing pin retainer plate also frees the extractor. With a small screwdriver pry it gently out, straight to the rear of the slide.

      13. When the extractor is pried out past its round headpiece, it can be easily grasped with the fingers and removed from the slide. The rear sight can be drifted out of its dovetail slot from left to right.

      14. The initial takedown key for the frame is the mainspring housing retaining pin, located at the lower rear edge of the grip frame.

      15. With the hammer at rest, use a drift of the proper size to drive out the mainspring housing retainer pin.

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