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The bolt is where all the hard work happens inside your AR-15, and it takes a beating every time you pull the trigger. The BCM SOPMOD Bolt Upgrade/Rebuild Kit gathers the small parts that wear out first and bundles them into one tidy package, so you can bring a tired bolt back to fighting shape or keep a spare set tucked in your range bag. Everything here is built to USGI specs and made in the USA, which is the kind of thing you want when you are trusting these parts to run under real conditions.
Inside you get a shot-peened extractor made to military spec, an extractor pin, the BCM extractor spring, three USGI gas rings, a Crane Ind mil-spec O-ring, and a black extractor insert. The extractor spring is the heart of the upgrade. It is chrome silicon, heat treated, stress relieved, and shot peened, which adds up to stronger, more consistent tension on the case rim so spent brass gets yanked out cleanly shot after shot. The gas rings and O-ring handle the sealing side of the equation, keeping your bolt cycling the way it should.
The extractor is what grabs the rim of the fired case and pulls it from the chamber. When that spring gets soft or the extractor gets chewed up, you start seeing failures to extract, and a semi-auto rifle that will not extract turns into a slow single-shot in a hurry. Swapping in these parts is a straightforward job with basic tools and a few minutes, and folks who have done it often mention how noticeably stronger the new spring feels compared to the worn-out original.
This kit pairs well with a BCM cam pin and firing pin kit if you want to freshen up the whole bolt carrier group at once. Whether you are upgrading a well-used carrier, replacing a broken part, or just being smart and stashing spares before you need them, this is the set that keeps your rifle in the fight.
This kit replaces the small wear parts on your bolt that tend to fail first, mainly the extractor and extractor spring. A weak or damaged extractor is the usual culprit behind failures to extract, where spent brass stays stuck in the chamber. Refreshing these parts restores reliable extraction and keeps your bolt carrier group cycling like it should.
Yes, it is built to USGI specifications and works with standard AR-15, M4, and M16 bolts. It is designed to pair with BCM bolts but fits mil-spec bolts across the board. If you have a standard AR-15 bolt carrier group, these parts will drop right in.
The BCM extractor spring is chrome silicon that has been heat treated, stress relieved, and shot peened. That process gives it stronger, more consistent tension on the case rim and better resistance to fatigue over time. Owners commonly note how much stiffer and stronger it feels compared to a worn factory spring.
No specialty gunsmithing tools are required for a basic swap. A punch to drive out the extractor pin and a little patience with the gas rings will get the job done in a few minutes. If you want to rebuild the entire bolt carrier group, pair it with a BCM cam pin and firing pin kit.
| UPC | 812526020468 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BCM-SOPMOD BOLT KIT |
| Color | AR-15 BOLT KIT |
| Length | 3.2000 |
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