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Every AR15 or M4 owner eventually runs into the same truth: it's rarely the big parts that cause trouble, it's the small ones. Extractors lose tension, gas rings wear thin, and ejectors get tired long before anything else on the rifle shows its age. Colt's Bolt Repair Kit is built around that reality, giving you a compact, genuine parts set to bring a tired bolt back to spec without hunting down individual components one at a time.
This kit covers the parts that see the most abuse cycle after cycle. You get a CAGE-marked Colt extractor paired with the copper-toned mil-spec extractor spring, the same setup Colt has used to avoid needing an O-ring for added tension. Add in the extractor pin, ejector, ejector spring and roll pin, plus a full set of three gas rings, and you've got everything needed to address the parts most likely to cause a failure to extract or eject.
Gas rings and extractors are consumable by design. They're meant to wear out, and when they do, malfunctions start creeping in even if the rest of the rifle is in great shape. Keeping a kit like this on hand means you're not stuck making a parts run mid-project or waiting around when your bolt starts acting up during a range session.
Colt built the mil-spec standard that most of the AR15 industry still measures itself against, and that history carries into small parts like these. Every piece in this kit comes sealed and labeled from the factory, so there's no question about authenticity or dimensional accuracy. It's a straightforward way to keep your bolt running the way Colt intended, whether you're doing routine maintenance or restocking a spare parts kit.
The kit includes a Colt CAGE marked extractor with the mil-spec gold extractor spring and insert, an extractor pin, an ejector with its spring and roll pin, and a set of three gas rings. These are the components that see the most wear during normal firing, so they're grouped together in one kit rather than sold piece by piece.
These parts are built to standard mil-spec dimensions, so they fit any bolt built to that same spec, not just Colt rifles. As long as your bolt carrier group follows the common AR15/M4/M16 pattern, this kit will drop right in.
A quick way to check gas rings is standing your bolt carrier on its face and seeing if it holds its own weight without collapsing. For the extractor, look for cracking or a rounded, worn tooth, and press on it to feel for spring tension. If either test comes back weak, it's a good sign these parts are due.
A roll pin punch set and a padded vise or bolt block make the job much easier, especially for driving out the ejector roll pin. It's a manageable task for anyone comfortable doing basic bolt maintenance at home, though a local gunsmith can handle it quickly if you'd rather not do it yourself.
| UPC | 098289600448 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SPK403979 |
| Color | Black |
| Model | |
| Product Type | Kit |
| Shipping Weight | 0.02 |
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