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Upgrade your AR-15 with the Brownells M16 MIL-SPEC Bolt Carrier Group! 🔧 High Pressure Tested & Magnetic Particle Inspected for reliability.

BROWNELLS M16 MIL-SPEC MP BOLT CARRIER GROUP - BROWNELLS M16 PHOSPHATE BOLT CARRIER GROUP MP C158

050806110977 078000250

Restrictions

Is a 'Call to order' product.

Top takeaways

The bolt carrier group is fully assembled, including all necessary components and is suitable for AR-15, 5.56 NATO, and 300 AAC Blackout firearms.
Each bolt undergoes High Pressure Testing and Magnetic Particle Inspection to ensure quality, although they are not stamped with HPT or MPI.
The bolt is made from Carpenter 158 steel and the M16 carrier from 8620 steel, both featuring a matte black phosphate finish for durability.

Attributes

Cartridge: 223 Remington,5.56 mm NATO,300 AAC Blackout
Finish: Matte Black,Phosphate
Make: AR-15
Delivery weight: 0.318kg
Shipping height: 33mm
Shipping width: 203mm
Shipping length: 305mm
UPC : 050806110977

Item details

Made in USA
US export classification: I(g)

Specifications:
Cartridge: 223 Remington, 5.56 mm NATO, 300 AAC Blackout
Finish: Matte Black, Phosphate
Make: AR-15

174.9 174.9 1 GBP

174.9 GBP 65 £174.90

Prices inclusive of duty & VAT.

Product no.: 078000250

050806110977 Complete M16 Bolt Carrier Group: Fully assembled Bolt Carrier Group; including the bolt, bolt carrier, gas key, firing pin, cam pin, and firing pin retaining pin Every Bolt is High Pressure Tested (HPT) with a proof load Following the High Pressure Test, every Bolt is Magnetic Particle Inspected (MPI) Not stamped with HPT or MPI The Bolt is machined from Carpenter 158 steel Following machining, the Bolt is heat treated and shot peened Installed extractor includes red o-ring with spring M16 Bolt Carrier is machined from 8620 steel and hardened Interior of Bolt Carrier Carrier Key & Bolt Carrier are chrome lined on the M16 Phosphate Bolt Carrier Group only M16 Bolt Carrier will function in semi-auto or full-auto AR-15/M16 Gas Key Screws are properly torqued and staked Bolt and Bolt Carrier feature a matte black mil-spec finish

Not available - Is a 'Call to order' product.

Not available.

Is a 'Call to order' product.

Not available.

Wish List Ask question

Requires order by phone

Specifications:
Cartridge: 223 Remington, 5.56 mm NATO, 300 AAC Blackout
Finish: Matte Black, Phosphate
Make: AR-15

Description:

Complete M16 Bolt Carrier Group: Fully assembled Bolt Carrier Group; including the bolt, bolt carrier, gas key, firing pin, cam pin, and firing pin retaining pin Every Bolt is Magnetic Particle Inspected (MPI) The Bolt is machined from Carpenter 158 steel Following machining, the Bolt is heat treated and shot peened Installed extractor includes red o-ring with spring M16 Bolt Carrier is machined from 8620 steel and hardened Interior of Bolt Carrier Carrier Key & Bolt Carrier are chrome lined on the M16 Phosphate Bolt Carrier Group only M16 Bolt Carrier will function in semi-auto or full-auto AR-15/M16 Gas Key Screws are properly torqued and staked Bolt and Bolt Carrier feature a matte black mil-spec finish

Complete M16 Bolt Carrier Group: Fully assembled Bolt Carrier Group; including the bolt, bolt carrier, gas key, firing pin, cam pin, and firing pin retaining pin Every Bolt is High Pressure Tested (HPT) with a proof load Following the High Pressure Test, every Bolt is Magnetic Particle Inspected (MPI) Not stamped with HPT or MPI The Bolt is machined from Carpenter 158 steel Following machining, the Bolt is heat treated and shot peened Installed extractor includes red o-ring with spring M16 Bolt Carrier is machined from 8620 steel and hardened Interior of Bolt Carrier Carrier Key & Bolt Carrier are chrome lined on the M16 Phosphate Bolt Carrier Group only M16 Bolt Carrier will function in semi-auto or full-auto AR-15/M16 Gas Key Screws are properly torqued and staked Bolt and Bolt Carrier feature a matte black mil-spec finish

Restrictions

Is a 'Call to order' product.

Top takeaways

The bolt carrier group is fully assembled, including all necessary components and is suitable for AR-15, 5.56 NATO, and 300 AAC Blackout firearms.
Each bolt undergoes High Pressure Testing and Magnetic Particle Inspection to ensure quality, although they are not stamped with HPT or MPI.
The bolt is made from Carpenter 158 steel and the M16 carrier from 8620 steel, both featuring a matte black phosphate finish for durability.

Attributes

Cartridge: 223 Remington,5.56 mm NATO,300 AAC Blackout
Finish: Matte Black,Phosphate
Make: AR-15
Delivery weight: 0.318kg
Shipping height: 33mm
Shipping width: 203mm
Shipping length: 305mm
UPC : 050806110977

Item details

Made in USA
US export classification: I(g)

Customers reviews

Customer ratings (10)

4 / 5

Recommended with reservations

Defective 15/08/2018

BCG arrived and was installed in a target gun. It lasted for around 4 months with light use (200-400 rounds a week). Started experiencing failure to eject malfunctions. Upon inspection the ejector spring had fallen out. I warranty'd the part out and will try again.

I will always use Brownells for 90% of my parts. This one just was a fluke...

Slightly recommend

Not the quality it should be 22/05/2017

Purchased 2 of these on 2 different orders, both failed after 200-250 rds. I originally thought the gas rings were bad "bolt was loose in carrier " but that wasn't the case. The carriers were not chrome lined or not done properly. Not bashing Brownells in any way, could have been a bad production run from supplier. I upgraded to the Bravo Company BCG and they are very nice. The return was simple and painless. A+++ to their customer service. I have used Brownells alot and they will remain my go to shop.

Slightly recommend

Disappointing 14/02/2017

Bought this BCG for my DMRish build. It's going to be a special gun, so expense was really not an issue. Took a flyer on a Brownells BCG because I had (and still have) a lot of faith in Brownell's quality.

When it became time to start assembly of the upper, I became very concerned about the quality of the BCG. Two issue immediately came to the fore: the very rough, difficult movement of the bolt and the firing pin retention pin. The bolt drags, and no amount of oil or grease eased it. I work at a gun store, and none of the AR-15s tried, even the cheapest DPMS, exhibits this type of difficult movement.

The second issue was uncovered when I disassembled the BCG. The firing pin retaining cotter pin was malformed. The two legs are spread quite wide, which makes resembling the BCG difficult and time consuming. I've never encountered this type of flaw before.

I'm not waiting for a third strike, not with the money invested in the gun, it's going back to Brownells.

An aside: I also used the Brownells Lower Parts Kit: also unimpressed with it's quality. Although, Brownells upper part kit was fine.

To the good, Brownells return process was quick and easy. The BCG is on its way back. I remain a huge fan of Brownells.

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