BCM® SS410 18" Rifle Complete Upper Receiver Group w/ MCMR-15 Handguard 1/8 Twist

MSRP: $1,042.95
Your Price: $830.95
(You save $212.00 )
Maximum Purchase:
5 units
5.56 NATO
Barrel Length:
Barrel Style:
Stock Status:

About the BCM® SS410 18" Rifle 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 18" 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
    BCM upper

    By no means am I an expert on AR15's. I have a few to compare against and the quality and workmanship are evident in this upper, the 'fit and finish' as they say is great. The tolerances on this upper are immediately visible and observable once you break it down and have a look. You get what you pay for and this one is worth it.

  • 5
    If it’s available, BUY IT!

    I’m a huge fan of BCM. I made this gun into an all around hunting rifle and let me tell you, these uppers are sweet! The stainless barrel looks really good. This is my fourth upper so I guess you could say I’m a fan of BCM.

  • 5
    Awesome Product

    This is my 2nd BCM upper with 18” stainless barrel. I use them for 3 gunning and shooting out to 500 yards. I’m very happy with the quality and accuracy of this product.

  • 5
    Shipping Experience

    Exceptional. Received faster than expected and all of the hidden extras in the box were icing.

    Can't wait til I have the opportunity to order from you again.

  • 5
    Well made upper

    This is a well made upper. Well machined parts. Perfect for my lower made by Springfield Amory (Saint). Great upgrade.

  • 5
    Excellent Upper

    The complete Upper works great and its simply made with a great craftsmanship. Excellent product.

  • 5
    Customer review

    Very nice!
    Have not had a chance to run it yet but I can’t wait.
    Fit and finish is top notch!

  • 5
    Very satisfied

    I was very satisfied with the product and the shipping. I got told from a friend to go through you guys and that you had very good products and I am very pleased with what I have ordered. Thank you

  • 5

    Ordering process was easy and chat, they kept me updated on my product during shipping. BCM ss 410 is more than I expected, it's obvious these guys/gals take pride in their work, I will be back for more parts. Totally satisfied. Keep up the great work yall