AR15 Upper Receiver BCG Combo


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AR15 Upper Receiver BCG Combo

Our AR15 Upper Receiver BCG Combo pairs two top selling products at a great price to help get your next AR15 build off to a solid start.  The combo starts with a very well reviewed Aero Precision AR15 Stripped Upper Receiver, and pairs nicely with the Arm or Ally 5.56 Bolt Carrier Group in a black nitride finish. 

Aero Precision Stripped Upper Receiver - Forged from 7075-T6 aluminum and precision machined to mil-spec M16/M4 specifications.  Features include M4 feedramps, .250 takedown pin holes, and laser engraved T-marks.

Manufacturer:  Aero Precision
Item #:  APAR501603C
Finish:  Black Anodized
Weight:  6.9oz
MSRP: $89.99

Arm or Ally 5.56 Black Nitride Bolt Carrier Group -

Arm or Ally M16 / AR15 Bolt Carrier groups in 5.56 NATO are precision ground, properly heat treated, full-Auto M16 BCG, manufactured using the finest U.S sourced raw materials available. The Black Nitride finish vastly increases the hardness of the steel, prevents corrosion, is highly resistant to wear, will not flake (it's not a coating, it's a bond), and has increased lubricity when compared to a phosphate finished BCG.  The Bolt Carrier Group is the heart of your rifle, and if you want to upgrade the reliability and functionality of your rifle, this is a great part to replace way to do it!

Since 2015, Arm or Ally has handled hundreds of thousands of bolt carrier groups and was the leading dealer of the Toolcraft BCG.  Trust us, when we say "we know bolt carrier groups"!  We have chosen specific manufacturers for each component of our BCG due to their high-quality parts, and attention to detail. For this particular BCG, we leave off the fancy logos and packaging and deliver you a best-in-class BCG for a very attractive price.

Manufacturer:  Leading US Manufacturer
Item #: TC556BCGBN
Caliber: 223 Rem / 5.56 NATO / 300 BLK
MSRP:  $189.99 (9310) | $209.99 (C-158)


What is the Arm or Ally Brand?

Arm or Ally branded products are manufactured in the same facilities and to the same standards as many popular, high-end brands.  Our promise to you is a high-quality product at a more affordable price. 100% American made products, backed by the same defect-free warranty as every other product we offer.

Bolt Specs
Material 9310 Steel
Extractor 4140 Billet Steel, O-Ring, Phosphate
Cam Pin 8620 Steel
Firing Pin 17-4-H-900 Stainless Steel
Finish Black Nitride+
Other MPI, Shot Peened, Heat Treated
Carrier Specs
Material 8620 Steel
Type M16 Full-Auto
Gas Key 4140 Billet Steel; Grade 8 Fastners
Finish Precision Ground; Black Nitride+
Other Heat Treated

Arm or Ally is a stocking dealer for all Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, CMC Triggers, HIPERFIRE and named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!  See our growing inventory of AR Parts, and Reloading Components.

Weight 1 oz
Dimensions N/A

Aero Precision, Toolcraft

Part Type

Bolt Carrier Group, Upper Receiver, Upper Receiver Parts



Select Bolt Type

9310 Steel (Standard), Carpenter 158 (Upgraded)

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