Rubber City Armory M16 Bolt Carrier Group - Adjustable Gas Key
- Manufactured by Rubber City Armory
- 8620 bolt carrier with nitride coating
- Pre-hardened gas key with nitride finish
- 9310 steel enhanced radius machined M16 bolt
- Tool steel extractor
- Cam pin
- Lifetime Warranty
Ratings & Reviews
These work well. Niche item for pinned barrels.
I've had one of these for a few years. They work as intended, and allow a light buffer for fast cycling with minimal gas. Works reliably and has a lock screw holding in the gas control screw.
<br>It's the only choice if you have a pinned muzzle device on a 14.5” (before braces were invented) or want to keep the pinned gas block (also the case on that same upper).