Builder Bundle M16 BCG 5.56mm NATO & Geissele 2 Stage Enhanced Trigger
Brownells · Bolt Carrier Group
No ratings yetBest price
$278.99at Brownells
Out of stock checked Oct 22, 2026
In stock now instead
- Sons of Liberty Gun Works AR-15 5.56x45mm NATO/.223 Remington O… $279.00at Kentucky Gun Co
- Bolt Carrier 5.56x45 NATO Lightweight Mil-Spec BCG Nitride Cham… $275.08at Brownells
- Bolt Carrier 5.56x45mm NATO Lightweight Mil-Spec BCG Nitride Ti… $275.08at Brownells
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $278.99checked Oct 22, 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.
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This part is out of stock at every store we track. These similar bolt carrier groups are in stock, with today's prices.
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $278.99 | $278.99 | $278.99 |
Since Sep 28, 2026.
About this part
The Builder Bundle M16 BCG 5.56mm NATO & Geissele 2 Stage Enhanced Trigger is a 5.56 / .223 bolt carrier group from Brownells. One store lists it, Brownells at $278.99.
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
- Brownells
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Material
- Steel
From the manufacturer
The Brownells M16 5.56 Complete Bolt-Carrier Group is designed to work easily and reliably in any AR-15 or M16 rifle chambered in 5.56x45mm, 300 AAC Blackout or .223 Remington. The Brownells M16 5.56 Complete Bolt-Carrier Group is constructed with a bolt made from 9310 steel, which is finished with a heat treatment and shot peening. The carrier is fabricated from 8620 hardened steel. Each element of the bolt-carrier group is finished in a black-nitride coating. Magnetic-particle inspected material Extractor includes spring and rubber insert Includes torqued and staked gas key Functions with any cartridge based on the 5.56 NATO cartridge case The Brownel Mfg: Brownells
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