Ships in 1-4 business days

BCM Standard 5.56mm Upper Receiver Group

$726.00 – $820.00

What’s Included | Specs | Pictures | FAQ | Restrictions

BCM has been our go-to for many years because they do an outstanding job of balancing quality, price, and overall performance. These standard uppers still feature the fit and finish you’ve come to expect from BCM without all the bells and whistles of the MK2 receivers at a lower base price. While we thoroughly enjoy the improvements found in the MK2 uppers, the cost/performance ratio of the standard upper receivers is hard to beat. 

WHAT’S INCLUDED

  • 1x BCM Standard Upper Receiver Group
  • 1x BCM Bolt Carrier Group
  • 1x BCM M-LOK QD Mount
  • 1x M-LOK Picatinny Section
  • Allen Keys
14.5″ models are not pinned and welded from the factory, and the A2 device that comes with these uppers is not long enough to do so. You’ll need a trusted gunsmith to do this once you install the muzzle device of your choice.

Back to top ↑

SPECS

UPPER FEATURES

  • Manufactured by Bravo Company MFG, Inc. (BCM)
  • Fully assembled, headspaced, and test-fired
  • M4 feed ramp barrel extension and upper receiver for reliable feeding
  • T-marked upper receiver for easy configuration of tactical accessories
  • USGI 1/7 twist rate for versatility with various ammunition
  • Mil-Spec barrel steel (Certified Mil-B-11595E) for strength and durability
  • Chrome bore and chamber for enhanced chambering, extraction, and reliability
  • Manganese phosphate barrel finish for corrosion resistance
  • 5.56 NATO Chambers for compatibility with military and high-quality ammunition
  • HPT / MP Inspected barrels for quality assurance and flaw detection

BFH BARREL FEATURES

  • Cold Hammer Forged Barrel
  • USGI 1/7 Twist Rate
  • Mil-Spec Barrel Steel (Mil-B-11595E)
  • Chrome Bore and Chamber
  • Manganese Phosphate Barrel Finish
  • 5.56 NATO Chamber
  • Government Barrel Profile
  • HPT / MP Inspected

STANDARD BARREL FEATURES

  • USGI 1/7 Twist Rate
  • Mil-Spec Barrel Steel (Mil-B-11595E)
  • Chrome Bore and Chamber
  • Manganese Phosphate Barrel Finish
  • 5.56 NATO Chamber
  • Government Barrel Profile
  • HPT / MP Inspected

BOLT CARRIER FEATURES

  • BCM (MPI) complete bolt carrier group for AR-15, M16, or M4
  • Parkerized exterior with chrome-lined inside carrier
  • Machined to USGI specifications, Full Auto Profile
  • M16/M4 carrier with Mil-Spec chrome-lined gas key
  • Gas key heat-treated and chrome-lined, securely fastened with grade 8 fasteners
  • Bolt assembly machined from Mil-Spec Carpenter No. 158 steel, shot peened
  • Includes tool steel extractor and ejector, BCM Extractor Spring
  • HPT (High-Pressure Tested) and MPI (Magnetic Particle Inspected)
  • BCM test fires for function before shipping

Made in the USA.

BUFFER RECOMMENDATIONS

INDEX:

Sprinco Hot White: In the middle of a standard carbine spring and the Blue spring, roughly 7-8% stiffer than standard.
Sprinco Blue: 15% stiffer than standard carbine springs.
Sprinco Green: Rifle length spring for A5/MK2 buffer systems.

16″ MidLength Gas14.5″ MidLength Gas11.5″ Carbine Gas
UnsuppressedCarbine: H1 – Standard Spring
Vltor A5/BCM MK2: -A5H1/T1 – Rifle or Sprinco Green Spring		Carbine: H1 – Standard Spring
Vltor A5/BCM MK2: -A5H1/T1 – Rifle or Sprinco Green Spring		Carbine: H2 – Standard Spring
Vltor A5/BCM MK2: – A5H2/T2 – Rifle or Sprinco Green Spring
Suppressed
(Low BackPressure)		Carbine: H1 – Sprinco Hot White or Blue Spring
Vltor A5/BCM MK2: – A5H2/T2 – Rifle or Sprinco Green Spring		Carbine: H1 – Sprinco Hot White or Blue Spring
Vltor A5/BCM MK2: – A5H2/T2 – Rifle or Sprinco Green Spring		Carbine: H2 – Sprinco Hot White or Blue Spring
Vltor A5/BCM MK2: – A5H2/T2 – Rifle or Sprinco Green Spring
Suppressed
(High BackPressure)		Carbine: H2 – Standard or Sprinco Hot White Spring
Vltor A5/BCM MK2: A5H2/T2 – Rifle or Sprinco Green Spring		Carbine: H2 – Standard or Sprinco Hot White Spring
Vltor A5/BCM MK2: A5H2/T2 – Rifle or Sprinco Green Spring		Carbine: H3 – Sprinco Hot White or Blue Spring
Vltor A5/BCM MK2: – A5H3/T3 – Rifle or Sprinco Green Spring

TECHNICAL SPECIFICATIONS

Specifications 16″, MCMR-13, Government Profile, MidLength Gas
14.5″, MCMR-13, Government Profile, MidLength Gas
Weight3 lb 15 oz 3 lb 12.5 oz
Weight, Standard Lower – No Stock5 lb 10.5 oz5 lb 8 oz
Weight, Standard Lower – Law Folder, No Stock6 lb 5.6 oz6 lb 3.1 oz
Length, Upper Only24.6″
Muzzle Device to End Of Receiver		22.9″
Muzzle Device to End Of Receiver
Length, Standard Lower – No Stock31.9″
Muzzle Device to End Of Carbine Extension		30.2″
Muzzle Device to End Of Carbine Extension
Length, Standard Lower – Law Folder, No Stock33.2″
Muzzle Device to End Of Carbine Extension		31.5″
Muzzle Device to End Of Carbine Extension
Length, Standard Lower – Law Folder, No Stock (Folded)26.6″
Muzzle Device to Furthest point		24.9″
Muzzle Device to Furthest point
Measurements are an approximation and can vary slightly between uppers.

Back to top ↑

PICTURES

Back to top ↑

FAQ

BFH vs. Standard? What do I get?
BFH is BCM’s name for cold hammer forged barrels. CHF barrels generally last a little longer and have more accuracy potential than standard barrels at an increased cost. This is not to say that standard barrels are bad. They will still have a long lifespan and be plenty accurate for 99% of shooters while maintaining a relatively low cost. 

Back to top ↑

RESTRICTIONS

For uppers with a barrel length of less than 16 inches, it is the buyer’s responsibility to be aware of all applicable laws and regulations regarding their purchase and ownership.

This product cannot ship to Washington State due to unconstitutional restrictions. Because we believe that all citizens should have the same rights, we will not make any exceptions for military, law enforcement, or government personnel.

BCM products cannot be shipped outside of the US.

Back to top ↑

You may also like…