AR-15 – Bolt Carrier Rebuild Kit – Extractor/Gas Key/Firing Pin Parts – Black
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
This Doublestar Corp. AR-15 Bolt Carrier Rebuild Kit is built for servicing key wear parts inside a standard AR-15 bolt carrier group. It includes extractor parts, gas rings, firing pin parts, gas key hardware, and other carrier rebuild components used when a BCG needs more than a quick wipe-down and wishful thinking.
This is for AR-15 bolt carrier rebuild work—not a complete bolt carrier group and not a lower receiver parts kit.
Fitment
- Fits standard AR-15 bolt carrier group service/rebuild applications.
- Intended for AR-15 pattern rifles.
- Works for replacing common bolt carrier group wear parts when the rest of the BCG is serviceable.
Does NOT fit
- Not a complete bolt carrier group.
- Not for AR-10/LR-308 bolt carrier groups unless individual parts are separately verified compatible.
- Not a cure for a damaged bolt, cracked carrier, improper headspace, or gas-system problem.
What it does
This kit refreshes the high-wear service parts inside the AR-15 bolt carrier group, including extractor-related parts, gas rings, firing pin parts, and gas key hardware. Those parts are small, but when one fails, the rifle tends to become a single-shot disappointment machine.
Why it’s worth it
A bolt carrier rebuild kit makes sense for maintenance benches, range bags, training guns, and rifles that see regular use. It gives you the critical service pieces in one place instead of chasing individual parts after the rifle already starts acting stupid.
Specs
- Brand: Doublestar Corp.
- Platform: AR-15
- Type: Bolt carrier rebuild kit
- Finish: Black
- Use: Bolt carrier group service and repair
What’s included
- 1 extractor
- 1 extractor spring with bumper pad
- 1 set of 3 gas rings
- 1 O-ring
- 1 extractor pin
- 1 firing pin
- 1 firing pin retaining pin
- 1 gas key
- 2 gas key screws
Tools needed
- AR-15 bolt carrier group disassembly tools as needed
- Punch set
- Torque tool/staking tools may be required for gas key work
- Bench block recommended
- Safety glasses recommended
Install notes
Gas key replacement is not a casual slap-it-together job. Proper installation, torque, staking, inspection, and function testing matter. If you are not set up to install and stake a gas key correctly, use a qualified armorer or gunsmith.
Verify before you buy
Verify that your bolt carrier group is a standard AR-15 pattern BCG and that the issue you are fixing actually involves these service parts. If your bolt, carrier, or gas system is damaged or proprietary, confirm compatibility before ordering.
⚠ Install & Compatibility Disclaimer
Installation should be performed by a qualified armorer or gunsmith. Improper installation, modification, or use may affect firearm safety and reliability. Buyer is responsible for verifying compatibility, performing proper function testing, and ensuring safe operation.
