Only Reliability Enhanced Bolt Carrier Group 5.56mm
Geissele Automatics · Upper Parts
No ratings yetBest price
$384.99at Brownells
Out of stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $384.99checked Oct 1, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $384.99 | $384.99 | $384.99 |
Since Sep 28, 2026.
About this part
The Only Reliability Enhanced Bolt Carrier Group 5.56mm is an AR-15 upper part from Geissele Automatics. One store lists it, Brownells at $384.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- Geissele Automatics
- Type
- Bolt Assembly
- Platform
- AR-15
From the manufacturer
The carrier is machined from mil-spec 8620 steel, and features a properly torqued and staked, chrome lined, gas key. The cam pin is machined from an advanced medical steel typically used to produce medical instrumentation known as H13, it is then coated with Nanoweapon (Chrome-Nitride) for maximum corrosion and wear resistance. The extended upper rails on the carrier also provide much greater stability and dramatically increase feeding reliability. The Carrier is coated with Nanoweapon for maxium corrosion and wear resistance. The Geissele Stressproof Bolt is made from Carpenter 158, however this is not your typical material spec'd by the US Government. Since Geissele wanted to take Mfg: Geissele Automatics
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