Expo Arms 5.56 NATO Complete MIL-SPEC M16 / AR-15 Bolt Carrier Group - Chrome
Details
Details
The Expo Arms 5.56 NATO Complete MIL-SPEC M16/AR-15 Bolt Carrier Group is a reliable and high-quality option for any build. This drop-in bolt carrier group (BCG) is specifically designed for AR-15 platform firearms chambered in .223/5.56 NATO.
Featuring a hard chrome finish, this BCG provides exceptional corrosion resistance, ensuring durability and longevity. The MIL-SPEC dimensions guarantee compatibility with a wide range of AR-15 platforms. The bolt is constructed from magnetic particle inspected Carpenter 158 steel, known for its strength and reliability. The carrier is crafted from aircraft-quality 8620 steel and features the M16 cut. It includes a gas key secured by properly staked grade 8 screws for enhanced reliability. The gas key is built from 4130 steel to withstand the demands of consistent firing.
Additional features of this Expo Arms BCG include a 4140 steel extractor, MIL-SPEC O-ring and gas rings, 4140 steel cam pin, and a hard chrome-finished 8740 steel firing pin. These components are carefully chosen for their durability and functionality. Expo Arms takes pride in manufacturing this BCG in the U.S.A., utilizing domestically sourced materials.
Features:
- Chambered in .233/5.56 NATO
- Hard chrome finish for corrosion resistance
- M16 cut for reliable performance
- Aircraft-quality 8620 steel carrier
- 4130 steel gas key with properly staked grade 8 screws
- Carpenter 158 steel bolt for strength and reliability
- 4140 steel extractor
- MIL-SPEC O-ring and gas rings
- 4140 steel cam pin
- Hard chrome-finished 8740 steel firing pin
- Magnetic particle inspected for quality assurance
- Lifetime warranty
- Proudly made in the U.S.A.
Specifications
California Prop 65 warning
WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.Ratings & Reviews
16 reviews
Works great, but has some literal rough edges
by Michael -
Used this in a 10.5 .300 blackout pistol, and it's worked flawlessly despite some issues I found when I first received the item. The bottom carrier rails are literally sharp enough to cut you, and there are machine marks easily visible on some parts of the carrier.
Despite that, the interior where the bolt rides inside the carrier is buttery smooth, and it's worked well thus far. Not a bad buy!
Probably the best option for a standard USGI pattern HC BCG
by Don't worry about it
Quality appears top notch, price is reasonable but not low enough to be suspect.
PA would not confirm the OEM, but listing looks like a carbon copy of Microbest including stock photos, MSRP, specs, & description. Which I see as a huge plus.
In short great quality, will definitely buy again
From Microbest
by Addison -
I hear these are made by the subcontractor microbest. That company is know for such BCGs as BCM, Daniel Defense, Colt, and FN. So you are getting their BCG for cheaper and with a superior coating.
Good value and well made!
by Jeff
Seems to be really well made and a good value for the price. PA customer service stated to me that the bolts are individually HP tested and MPI.
Seems to have smooth well fit bores and the bolt feels smooth with slid in and out by hand.
I will absolutely buy another without hesitation.
Quality is hit-and-miss
by Harold -
I ordered two of these at the same time. The first one was excellent in quality. Smooth finish, great tolerances, good head space, and gauged nicely.
The second one was a different story. It had some nicks and sharp edges on the rails (I stoned those a little to smooth them out), and the ejector was so tight I had to use pliers to remove it from the bolt -- this is a reliability issue. So I had to install a new ejector.
So in short, if you get a good one, you'll be very happy. But the quality is inconsistent from unit to unit, so be wary and inspect it carefully before installation.
Great BCG
by Avery -
Used it in my older rifle an runs better than ever