BCM® Standard 20" Government Profile Complete Upper Receiver Group

MSRP: $695.40
Your Price: $560.40
(You save $135.00 )
SKU:
BCM-URG-GOV-20
Features:
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)
Ch
Caliber:
5.56 NATO
Barrel Length:
20in
Barrel Style:
Standard
Barrel Profile:
Government
Stock Status:

Out of stock

About the BCM® Standard 20" Government Profile Complete Upper Receiver

PLEASE NOTE: These batches can sell out quickly.

If the Stock Status is Out of Stock and you would like to get notification when more product arrives, please click the "Email me when Back-In-Stock" link under the Add To Cart button. You will get immediate notification of all new arrivals of product.

If you get a email notification and you check back again with our website to see that the product has already again sold out, please click the link again and add your email to the notification list.
 
Please check back with our website often, we can not take pre-orders or backorders on these products.

Manufactured by Bravo Company MFG, Inc. (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 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 per Mil-Spec. 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.

Shop Related Products:

Want to see more upper receivers? Click the links below to view more BCM® AR complete uppers!

 

Bravo Company builds: Life Saving Tools™
 
Copyright 2023 Bravo Company MFG, Inc.
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

143 Reviews

  • 5
    20" Upper

    Used to create an M16A4 build. Smooth shooter, and great accuracy at 200 yrds. Paired with a KAC M5 hand guard really rounds out the look. Would recommend to anyone looking for an M16 style build. You will not be disappointed.

  • 5
    Great Upper

    Great quality, you always know what to expect from BCM. I bought this upper for a M16A4 clone build. Put a KAC M5 RAS on it and it fit perfect. Extremely happy with how it all turned out.

  • 5
    Ok

    Does this come with plastic HandGuards

  • 5
    20 inch upper

    Outstanding!! Accurate!!! Worth the wait

  • 5
    20” BMC

    Best of the best. Fit and finish is perfect. I was able to get BMC bcg to match with the upper and attached carry handle and the balance is sweet. Only 60 round thru it so far but zero issues. Will definitely buy from BMC again.

  • 5
    Great Upper

    Great high quality upper for your fullsize 20" AR build. Can't beat a solid a2 fsb and that fullsize velocity. BCM quality is top tier, worth the price!

  • 4
    BCM® Standard 20" Government Profile Upper Receiver Group

    The Good: High quality item, probably the best being manufactured today. Reliable and durable.

    The Bad: BCM doesn't sell the handguard for it. It has a Triangular end cap, and those types of handguards or rails are extremely difficult to find these days. Slowed down my build by at two weeks. That's why only four stars.

  • 5
    Great upper

    This is a great upper. Exactly what I was looking for. Excellent quality. I love it

  • 5
    20" upper

    fantastic of course! Only issue is that I never got the back in stock email :(
    Daily checking did the trick