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
22 reviews
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
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!
Great unit
by Robert -
Good finish and performed well in my build. Chrome is the best finish for a bcg hands down.
Expi bolt carrier
by Nate -
Haven't used these yet but other 5 , I've never had a problem with. Look good, solid built.
fits the bill
by Mike -
I bought this BCG specifically because it had a chrome finish. It was going into a retro AR with military spec chrome chamber and barrel, and the BCG had to be chrome plated as well. The hard chrome finish is very durable and will make a great addition to my retro AR.
Rock Solid BCG
by Eddie M -
I’ve been wanting a nickel boron or chrome bcg for a while, I saw that expo arms chrome bcg went on sale so I decided to pull the trigger. The finish is good, gas key is torqued properly and the staking is aggressive. I can’t find a reason to give it 4 stars so it’s going to be 5 out of 5 from me. The only negative is the tooling marks on the rear end of the of the carrier (inside) but it hasn’t affected the function in anyway. It’s not enough for me to take away a star on a hundred dollar or so bcg. The lifetime warranty and great customer service from PA should put your mind at ease.
P.S. Bcg and barrel combo shoot right at 2 moa with m193.
Great BCG for the money
by robert -
I have purchased 2 of these. They function flawlessly. Overall, I am impressed with the quality of the BCG. The second one did have some rough edges at the lower rail sections making it sound like a zipper when charged. Sand paper and a few minutes fixed it easily. QC has been terrible on everything during the pandemic; so I consider this a very minor issue. Gas key appears to be sealed and staked properly, it is pressure tested, o-ring is present under extractor, gas rings are good, proper protrusion on firing pin, and they head spaced fine. These have become my new favorite BCG.
Flawless
by Teon -
Good stake job and a quality part from a quality company!
Excellent
by Michael -
Have a Stag 15 Tactical and wanted a BCG as a spare. When it arrived, went to the range and put 3 mags through it ( 90 rds) Have now run about 500 rds and NOT one FTF or FTE. Runs great. Have cleaned it up and placed my factory BCG back in the rifle. It's good to know that if I need to switch, it won't skip a beat. Great job, Expo Arms!
Cleans easy; runs flawlessly
by Nice Guy Eddie
I love this BCG. it has run flawlessly and cleans up easier than the nickel boron BCG ‘s that I have in two other rifles.