TacFire AR-15 5.56 NATO Bolt Carrier Group/MPI Tested Nitride (Made in the USA)
$88.32
The TacFire AR-15 5.56 NATO Bolt Carrier Group is MPI tested and features a durable nitride finish. It ensures reliable cycling and is made in the USA.
Out of stock
An AR-15 bolt carrier group is a piece of a firearm that houses many important parts such as the firing pin gas key cam pin extractor and bolt. With all these pieces working together the BCG can grab and feed another round out of a detachable magazine chamber and engage the cam groove engage with the locking lugs in the barrel fire and extract a spent cartridge. During the extraction of a cartridge the BCG works to absorb the force of the explosion by expanding gas in the carrier. During this process gas is tapped off from the barrel and is sent into the cup inside of the gas key creating an inertial force that sends the Bolt Carrier Group back into the buffer tube which helps to minimize the recoil of your gun when firing and the cycle will repeat for subsequent shots.
This BCG is an AR-15 compatible design allowing use with .223 Remington 5.56 NATO .300 Blackout & .350 Legend cartridges. The standard AR-15 bolt carrier is also machined from 9130/8620 Steel with a Nitride finish. This BCG comes with the ability to be fully-auto compatible and also features forward assist notches. MPI testing has also been done to ensure that there are no structural flaws to this BCG.
Finish: Nitride – Nitriding is a process during manufacturing that diffuses nitrogen into the steel to make a case-hardened surface for improved resistance and strength. A Nitrided BCG typically has a gloss black texture. Nitrided Bolt Carriers have increased resistance from heat and corrosion.
- Weight 11.7 oz
- 7.5 oz
- Bolt: 9130 Steel
- Carrier: 8620 Steel
- MPI Tested and Shoot Peened
| Weight | 0.730 lbs |
|---|---|
| Dimensions | 9.850 × 4.000 × 1.000 in |
| Manufacturer | Tacfire Inc. |
| Finish | Nitride |
| Material | 9130/8620 Steel |
| Compatible With | .223 Remington, 5.56 NATO, .300 Blackout, .350 Legend |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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