The Gun Digest Book of Rimfire Rifles Assembly/Disassembly. J.B. Wood
guide unit, toward the front.
14. Remove the springs and spring guide unit from the rear of the bolt.
15. Drifting out a horizontal roll pin will release the firing pin for removal from the top of the bolt.
16. Drifting out a vertical roll pin (arrow) on the right side of the bolt will release the extractor and its spring for removal toward the right.
17. The safety is retained by a spring C-clip inside the receiver. After removal of the clip, the safety is removed toward the right.
18. Backing out the screw at the rear of the receiver will release the rear sight for removal.
Reassembly Tips:
When replacing the bolt and bolt spring assembly in the receiver, be sure the two springs are completely seated on the guide, and that the guide is horizontally oriented so the springs will not kink.
Before replacing the trigger in the receiver, swing the inside arm of the mainspring up to the rear and rest it on the inside of the receiver. When the trigger is in place, use a small screwdriver to lift the inner arm of the spring while inserting the spring base pin. Be sure the tip of the spring engages the groove in the pin.
1. When replacing the rear sight, note that the position of the sight plate is adjustable, and any change will affect the point of impact.
2. When replacing the sideplate, be sure the small tip of the hammer pivot is aligned with its hole in the sideplate.
3. When replacing the barrel, be sure the guide key on the top of the barrel enters its slot in the front of the receiver. Tighten the barrel collar firmly, by hand, but do not over-tighten, as both collar and receiver are made of alloy.
Chipmunk
Similar/Identical Pattern Guns
The same basic assembly/disassembly steps for the Chipmunk also apply to the following gun:
Chipmunk Deluxe
| Data: | Chipmunk | |
| Origin: | United States | |
| Manufacturer: | Oregon Arms, Inc. Medford, Oregon | |
| Cartridge: | 22 Long Rifle | |
| Overall length: | 30 inches | |
| Barrel length: | 161/8 inches | |
| Weight: | 2½ pounds |
This elegant little rifle was designed for young shooters, but it has also seen some use by campers backpackers and others who value its small size and reliable mechanism. It was first made by the Chipmunk Manufacturing Company from 1982 to 1988, then by Oregon Arms between 1988 and 1996. At the present time, it is being produced by Rogue Rifle Company. The instructions can be applied ot all Chipmunk rifles.
Disassembly:
1. Hold the trigger to the rear, open the bolt, and remove the bolt toward the rear.
2. Remove the stock mounting bolt, located on the underside, just forward of the trigger guard. Remove the action from the stock, straight upward. The fitting is often tight, so use care, and apply equal pressure at each end.
3. The trigger guard and the stock buttplate are each retained by two wood screws.
4. The cross pin that retains the combination sear and trigger spring is rebated at each end. To remove it, depress it upward with a tool or fingertip until its larger central portion is aligned with the exit hole on either side. Then, push it out. Caution: The spring is under tension, so control it.
5. Remove the spring from its recess.
6. Remove the trigger downward.
7. Pushing out the cross pin will allow the sear to be separated from the trigger.
8. The elevation adjustment screw also retains the rear sight on the receiver. The windage adjustment screw retains the aperture on the sight base.
9. A cross pin retains the barrel in the receiver. In normal takedown, this is not disturbed. If removal is necessary, drift out the pin and use a hardwood block to drive the receiver off the barrel. Note that the cross pin is a roll pin, so use a roll pin punch to avoid deformation.
10. With a tool or a strong thumbnail, depress the extractor plunger and remove the extractor toward the side. Caution: Control the strong spring and plunger.