BCM® MK2 SS410 16" Mid Length Complete Upper Receiver Group w/ MCMR-13 Handguard 1/8 Twist

MSRP: $1,177.99
Your Price: $844.66
(You save $333.33 )
5.56 NATO
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Out of stock

About the BCM® MK2 SS410 16" Mid Length Complete Upper Receiver w/ MCMR-13 Handguard 1/8 Twist

All BCM® Upper Receiver Groups with a MCMR Handguard Include:

  • One 3" Picatinny Rail Section
  • One BCM MCMR Sling Mount

Manufactured by Bravo Company MFG, Inc. (BCM)

These Barreled Upper Receiver Groups are designed for shooting professionals and responsible civilians with the Mil-Spec features for the demands of their duty. They are fully assembled, headspaced, and test fired.
As a note: 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.

Featuring BCM’s Patented MK2 Upper Receiver

This proprietary design offers enhanced rigidity over the USGI product.  The increased rigidity limits barrel deflection which aids in consistency/accuracy.   Less flex also reduces premature damage, wear, and failure of bolt lugs from misalignment.   A gas expansion chamber is machined above the charging handle track, combined with dual vents machined at the rear (each side, above charging handle latch) help to redirect and vent gas away the shooters face. U.S. Patent Numbers: 10670355, 10677549, D888182

SS410 Barrel Steel

This 16" BCM barrel is machined from SS410 stainless steel. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels.

M4 Feed Ramp Barrel Extension and Upper 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 upper receivers 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.

5.56 NATO Match Chamber (USMC SAM-R Chamber)

The USGI 5.56 NATO chamber is the best choice for effective deployment, reliability, and compatibility, of higher chamber pressures of military or high quality personal defense ammounition.  The SAM-R chamber is the precision version of the 556 NATO chamber.

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.***

3 Reviews

  • 5
    excellent upper

    Fit and finish is excellent. I like the narrow handguard, good length for mounting accessories, and the weight and balance are very good even with a bipod. Just broke it in and got it zeroed, accuracy is impressive, and with the midlength gas system it shoots very smoothly. I can tell this is going to be my new favorite "do it all" 5.56 upper. Happy to have a complete BCM carbine setup now!

  • 5
    Excellent product

    BCM has always exceeded my expectations. Quality product, great customer service, fast shipping. With everything going on this year, I would understand some deviation to these standards but they seem to remain unwavering. Great company, great products.

  • 5
    New Upper

    So I ordered this about 3 weeks ago, it took a week to get here and so far I'm happy. She's sitting on a Smith and Wesson MP15 lower with a red dot sight. First range trip she ran XM855, Hornady Black and TAP along with Tula, all without an issue. Accuracy seems good, although hard to tell at short ranges, 100yds and less with only a red dot on. Also BCM order fulfillment was FAST with time from order until the UPS guy showed up at my front door being less than a week. Compare that to the set or backup irons I ordered from another vendor which I cancelled because of the very slow fulfillment. Only downside is the upper is heavy. Also can't say I've seen any staggering upside at this point form the changes they made to the receiver but it doesn't seem to have hurt anything either. Overall very happy with the purchase and buying experience.