BCM® SS410 16" Mid Length Complete Upper Receiver Group w/ MCMR-15 Handguard 1/8 Twist

MSRP: $1,163.95
Your Price: $830.95
(You save $333.00 )
Maximum Purchase:
5 units
5.56 NATO
Barrel Length:
Barrel Style:
Stock Status:

About the BCM® SS410 16" Mid Length Complete Upper Receiver w/ MCMR-15 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.

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.***

9 Reviews

  • 5
    this shit is accurate

    the 1/8 twist isnt milspec but it is the best twist imo 62 grain m855 shoots like a dream out of it and the stainless barrel made me coom in my pants

  • 5
    BCM Upper

    Absolutely the best AR Upper

  • 5
    Bcmss410 16"

    My son a navy seal told me I could not get a better piece of equipment for the price. He was correct as usual

  • 5
    Upper receiver

    Have not used yet bolt on backorder

  • 5
    BCM SS410 16"

    Excellent upper. Solid, accurate and reliable. Expected nothing less from BCM! Highly recommend anything built by BCM!

  • 5
    BCM SS410 16" Mid Length Upper Receiver Group w/ B

    Excellent rifle

  • 5

    This is my third BCM upper and I have yet to be disappointed. Accurate and top notch fit and finish. Like the contrast of the stainless barrel. Thank you for making what is one of, if not the best upper for the money out there.

  • 5
    Great Upper

    I've had this upper, paired with a BCM complete lower, BCM Mod 4B CH, BCM KAG forend grip, Armaspec Stealth Captured Spring in H2, and WMD NiB-X BCG for about 7 months now. It's had about 4k rounds through it, and has been flawless since day one.

    The excellent build quality is apparent not only in lack of failures, but also the fit & finish, and handling/ergonomics/comfort. I can't speak more highly of the MCMR hand guard, especially when mated with a BCM KAG foregrip.

  • 5
    Customer review

    Super fast shipping