Expo Arms 5.56 NATO Complete MIL-SPEC M16 / AR-15 Bolt Carrier Group - Phosphate

Manufactured by Expo Arms
SKU: XP-BCG-M16-P
MPN: XP-BCG-M16-P
Manufactured by Expo Arms
38 Reviews
$99.99 $139.95

In Stock

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Details

Details

The Expo Arms Bolt Carrier Group is a great choice for any build. This drop-in AR-15 BCG features a tough manganese phosphate finish, MIL-SPEC dimensions, and a magnetic particle inspected carpenter 158 steel bolt. Crafted from domestically sourced 8620 steel, the M16 cut carrier includes a gas key fastened by properly staked grade 8 screws. Made in the U.S.A. and covered by a lifetime warranty, you can count on this BCG for a lifetime of service.

Features:
  • .233/5.56 NATO
  • Hard chromed bore and gas key
  • Manganese Phosphate finish
  • M16 cut
  • Aircraft quality 8620 steel carrier
  • 4130 steel gas key
  • Properly staked grade 8 gas key screws
  • Carpenter 158 steel bolt
  • 4340 steel extractor
  • MIL-SPEC O-ring
  • MIL-SPEC gas rings
  • 4140 steel cam pin
  • 8740 steel firing pin with hard chrome finish
  • Magnetic particle inspected
  • Lifetime warranty
  • Proudly made in the U.S.A.
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Specifications

Bolt FinishManganese Phosphate
Bolt MaterialCarpenter 158 Steel
BrandExpo Arms
Caliber Gauge5.56 NATO
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
PlatformAR-15
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.

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Ratings & Reviews

38 reviews

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Functions Flawlessly

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Appears to be built very well. Function: perfect.

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Awesome product.

by -

I purchased this for my first rifle build in 2020. It still runs flawlessly and I haven’t had any issues with it.

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Microbest

by -

Bcg made by Microbest. The excess of chrome lining in carrier is dead give away. Same as bcm and Daniel Defense. This bcg is up to par with bcm and Daniel Defense. I see these as the gold standard of bolt carriers. So that would make this expo arms a gold standard bcg. Don’t wait… just buy it… you know you want to…. Add to cart…. Everyone is doing it…..

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🦅👌Good to go 👌🦅

by -

Got 2 of these for new builds. Haven’t sent any real egregious strings of fire through either yet but have performed well for a few hundred rounds so far.

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Expo bcg

by -

Quality bcg will definitely buy again, identical to my Microbest bcg’s

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Near Perfection

by -

PA Expo Arms BCG is my new go to for all future builds.

These are the measurements (+/- .0002”) from the Expo Arms bolt I purchased.

Bolt Tail Bore: G2 .251” +
Gas Ring Bore: G2 .499”
Shoulder Support: G2 .530”
Carrier Length: 6.675”
Carrier Key Bore: .180”
Bolt Length: 2.7995”
Bolt Tail Diameter: .2507”
Bolt Shoulder: .5279”
Cam Pin Diameter: .3109”
Cam Pin Bore: .3135” x .311”
Firing Pin Bore: .063”
F/Pin Diameter: .0585”
F/Pin Protrusion: .0305”

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Great bcg

by -

Just an outstanding quality bcg. The best part is when these are on sale… you can grab them for less than 100$ thanks to primary arms.

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Looks good

by -

Haven't used it yet but appears to be well made. Good price with upper

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