CMMG's bolt rehab kit refreshes a tired AR-15 BCG without buying a complete bolt. Drop-in mil-spec replacements for the consumable parts on any 5.56 / .223 / 300 BLK bolt — all US-made.
Covers virtually every part on a standard bolt that loses tension, peens, or cracks after a few thousand rounds. If your rifle is throwing brass past 4 o'clock, ejecting weakly, or short-stroking after long sessions, the extractor spring and gas rings are usually the first to replace — both are in the kit.
Kit contents:
Specs:
