Cryptic Coatings 9mm Glock/Colt Style BCG – Bolt Carrier Group
Upgrade your 9mm AR-15 pistol caliber carbine (PCC) with the Cryptic Coatings 9mm Bolt Carrier Group. Purpose-built for 9mm — not adapted from a rifle BCG — this complete bolt carrier group delivers reliable feeding, extraction, and ejection with both Glock and Colt-style magazines (and drop-in magwell adapters).
The advanced PVD/CVD coating provides exceptional lubricity, reduced friction, lower operating temperatures, less carbon fouling, and easier cleaning while giving your build a distinctive high-luster bronze finish. Backed by Cryptic Coatings’ lifetime warranty.
Key Features
- Compatible with Glock and Colt-style magazines + drop-in magwell adapters
- Extra heavy-duty 4140 heat-treated external extractor specifically designed for 9mm case geometry
- Threaded removable extractor pin for easy field service
- Removable counterweight (threaded set screw) for tuning carrier mass to your buffer/spring setup
- Aluminum guide key installed with self-locking bolts (no staking required)
- Mil-spec 8620 aircraft-quality steel carrier, heat-treated to 60-61 RC
- Stainless steel firing pin with spring
- Dust cover compatible
- Works with most aftermarket triggers and any mil-spec buffer/spring assembly (JP, Armaspec, etc.)
- Total weight: 13.5 oz
Technical Specifications (from Cryptic Coatings)
| Specification | Detail |
|---|---|
| Caliber | 9mm |
| Carrier Material | Mil-spec 8620 aircraft-quality steel |
| Heat Treat | 60-61 RC |
| Extractor | 4140 heat-treated, heavy-duty external |
| Extractor Pin | Threaded, removable |
| Firing Pin | Stainless steel with spring |
| Guide Key | Aluminum, self-locking bolts |
| Counterweight | Removable via threaded set screw |
| Coefficient of Friction | 0.2 |
| Hardness | 3200 Vickers |
| Max Temperature | 750°F |
| Coating Thickness | 0.0002″ – 0.0006″ |
| Weight | 13.5 oz (≈13.4 oz listed) |
| Compatibility | Glock/Colt-style 9mm AR builds, mil-spec buffers/springs |
