User:Gkpoole/Winchester Model 77

Overview
The Winchester Model 77 is a blowback-operated, self-loading rifle. This rifle loads .22 Long Rifle cartridges from a 7 round capacity, detachable box magazine located immediately forward of the trigger guard. A tube magazine version was also produced. The barrel is 22 inches long, round and tapered. The receiver is cut for Dovetail scope mounting.

Breakdown
Two screws in the trigger guard hold the receiver to the stock. With the front stock stud screw and the longer rear recoil block screw removed the barrel and receiver lift out of the stock.

Drift out the barrel locating pin to separate the barrel and receiver. After the barrel is removed, the bolt will slide forward enough to spread the operating slide assembly out and detach it from the bolt. The main spring and operating slide assembly are now loose. The bolt will now slide out of the receiver. The firing pin striker and firing pin striker spring will also come out of the receiver if the rifle was uncocked. If cocked, the firing pin striker and firing pin striker spring will be held in place in the receiver by the sear. The spring is under tension so the spring and striker will become a projectile if the trigger is pulled.

Drifting out the extractor pin in the bolt will release the extractor and extractor spring. It will also allow the firing pin and firing pin spring to slide out of the back of the bolt.

The timing spring is under tension and must be compressed before removing the timing rod retaining ring to release the timing rod collar and timing rod. The timing rod can now be removed from the bolt.



Drifting out the ejector spring retaining pin from the firing pin will release the ejector spring and ejector.



History
217,000 units produced by the Winchester Repeating Arms Company beginning in 1955 and discontinued in 1963. Approximately 10% of the rifles were the 15 round tube fed variant.