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  BCM Standard 16" M4 Carbine Upper Receiver Group

BCM M4 16" Upper Receiver Group
BCM M4 16" Upper Receiver Group

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List Price: $539.00
Our Price: $439.00
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Stock Status:In Stock
Product Code: BCM-URG-M4-16

Bolt Carrier Group and Charging Handle Package

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Professional Grade Weaponry, by BCM™
Made by Bravo Company MFG, Inc. (BCM™) These Barreled Upper Receiver Groups are designed for shooting professionals with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.
As a note: BCM™ barrel components are parkerized separately before assembly. Prior to shipping, all BCM™ upper receiver groups are test fired for function, laser bore sighted with a Milspec carry handle for sight alignment within Mil-Specs, and then batch samples are test fired for accuracy. As such, the upper receiver group will show handling marks consistent with these quality control procedures.

M4 Feed Ramp Barrel Extension (USGI)
M4 Feed Ramp Flat Top Receiver
In developing the USGI M4 carbine as one of the primary weapons for today’s infantry, some modifications were performed to the original M16 platform to enhance the reliability of the shorter barreled carbines. With the shorter carbine gas system and the increased gas port pressure, the carbine cycled faster, and at times the cycle rate could be faster than the magazine would feed ammunition. One of the modifications done to increase reliable feeding included enhancing the angle and the length of the feed ramps. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. This feature is offered on all BCM uppers and all BCM barrels.
T-Marked Upper Receiver
The contemporary M16/M4 rifle is built around the concept of modularity. All of the BCM flat top uppers feature a USGI type laser etched T-marks to provide addressing for the remounting of tactical accessories such as optics, laser sights, etc. This enables the weapon platform to be easily configured and then accurately reconfigured for each specific mission.
USGI 1/7 Twist Rate
The USGI 1/7 twist rate of all of the BCM barrels is the preferred twist rate by most professional infantryman. This twist rate has proven very versatile and can effectively run the new heavier 5.56 ammo that is hugely popular with military and private security personal for its’ superior ballistics.
Mil-Spec 11595E - Barrel Steel
BCM barrel steel is Mil-Spec per MIL-B-11595E. This grade (CMV) of steel is a Mil-Spec steel used in the USGI M16 family of rifles; it is stronger and will last longer than the typical barrels offered in the commercial market. The Mil-Spec grade steel gets its’ additional strength and rigidity from an increase in carbon and/or vanadium in the alloy. This will offer increased barrel life and performance through use in all types of extreme environments and temperatures.
Chrome Bore and Chamber
One of the first modifications that were made to the original M16 in the mid 1960’s was the addition of the chrome lined bore and chamber. It is now a worldwide standard in the industry for a battle rifle. The chrome bore and chamber is harder than the barrel steel and on the USGI M16/M4 rifles will aid in chambering, extraction, and reliability. It increases velocity, and also resist against fouling and corrosion from extended use in the field. This gives the end user a longer barrel life with less required time in maintenance and cleaning.
Manganese Phosphate Barrel Finish
Barrels are parkerized with the manganese phosphate finish (Mil-Spec A-A-59267). Military specifications also state that the entire barrel surface is phosphate finished to create a porous surface to absorb oil as to resist against corrosion from the elements. BCM barrels are phosphated before installation of front sights. This is a much more extensive assembly operation, but insures that the entire barrel is finished and protected . . .even under the front sight base.
5.56 NATO Chambers
The USGI 5.56 NATO chamber is the best choice for effective deployment, reliability, and compatibility, of higher chamber pressures of military ammo.
Mil-Spec F-Marked Forged Front Sight Bases
Mil-Spec for rifles issued to the troops require taller front sight bases on all flat top AR rifles. Many commercial offerings use M16A2 height front sight bases on all of their barrels regardless of what type of upper it is installed on. As a result, owners of rifles and carbines with the flat top receiver configuration can have problems getting a proper 'zero' for elevation with Mil-Spec back up iron sights. As all of the BCM uppers are built for flat top uppers, all have the proper Mil-Spec F marked front sight base to insure the correct height for iron sight zeroing when using military iron sights. Mil-Spec taper pins secure the forged front sight base with the sling swivel secured by tubular rivets.
Government Barrel Profiles
Duty rifles are built to be carried - day in and day out. The USGI barrel profiles (often referred to as the Government Profile) enable the operator to carry their weapon for longer periods of time and deploy them faster than the heavier commercial H-Barrel counterparts. The government profile barrel is also compatible with the current M203 mounting systems.
HPT / MP Inspected Barrels
Military specifications require that barrels undergo a HPT (High-Pressure Test) load as a part of quality assurance procedures. Commonly referred to as a proof load, the M197 HPT is rated for 70,000 psi. BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444-01 (current Mil-Spec) to assure a high quality finished product. All BCM barrels are marked HP MP as our proof load marking.
Copyright © 2005 - 2009 Bravo Company MFG, Inc.
  • M4 Feed Ramp Barrel Extension
  • M4 Feed Ramp Flat Top Receiver
  • T-Marked Upper Receivers
  • USGI 1/7 Twist Rates
  • USGI 5.56 NATO Chambers
  • Mil-Spec 11595E - Certified Barrel Steel (CMV)
  • Chrome Lined Bore and Chamber
  • Manganese Phosphate Barrel Finish
  • Mil-Spec F-Marked Forged Front Sights
  • USGI Government Profile Barrels
  • HPT (High Pressure Test) Barrels
  • MPI (Magnetic Particle Inspected) Barrels

Average Customer Review: 5 of 5 | Total Reviews: 57 Write a review.

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  0 of 0 people found the following review helpful:
BCM Standard 16" M4 Carbine Upper November 29, 2015
Reviewer: Leonard Wilson JR from Philadelphia, PA United States  
BCM makes one awesome upper and I ordered Wed before Thanksgiving and had Saturday morning!  This upper fit nice and tight on my Spikes lower.

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  0 of 0 people found the following review helpful:
Amazing. November 14, 2015
Reviewer: Anonymous Person  
First you wont be waiting 15 to ???? Business days to get this. After that sinks in... you have an amazing upper when paired with the BCM BCG and Gunfighter Charging Handle. Everything functions flawlessly. Worth every last cent. Totally Accurate with Backup MBUS Sights and took 20 RDS to get a 2 in group at 50 YDS. Buy this you will not be disappointed. You will have it on Friday if you order it on Tuesday. Bought this after I bought an upper from somewhere else and am still waiting patiently for that purchase... You get what you pay for which is an amazing upper. Amazing shipping times and Amazing Customer Service. Buy from these guys you will not be disappointed and if you are I’ll buy your upper from you! Did I mention how much more amazing this thing was than the Franken upper I had from my first build? Buy this you will not be disappointed!

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  0 of 0 people found the following review helpful:
your guys rock November 11, 2015
Reviewer: peter Killion-Conrad from upper marlboro, MD United States  
the service was amazing as was the product. keep up th good work your business and costumer  service is awesome.

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  0 of 0 people found the following review helpful:
BIG THANKS AGAIN TO BCM!!! November 11, 2015
Reviewer: Iron Fist 0341 from monterey park, CA United States  
BCM has always been great to me with my purchases. Great service and fast shipping. Much appreciated and nice doing business with you guys again!!! YUT!!!

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  0 of 0 people found the following review helpful:
BCM Standard 16" M4 Carbine Upper Receiver Group November 11, 2015
Reviewer: HD from Aztec, NM United States  
BCM could be the most professional company I’ve ever dealt with.  Their products are top of the line at reasonable prices, and their quality control is uncompromising.  Their customer service is second to none and their response to any inquiries has always been prompt, helpful, and to the point.  This all combines to give BCM a very competent and no-nonsense air to it that makes for a very satisfied and loyal customer.  This is the fourth complete upper I have purchased from BCM. One, I only just received and is still unused, but everything looks right and I’m confident that it will be up to their usual standards.  The other three of them have been substantially fired and they have all functioned flawlessly.  I have never had a single issue with any of them, or for that matter, any other item I’ve ever ordered.  Every transaction has been perfect and I have absolutely no problem recommending this upper or BCM to anyone.

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