BCM® SS410 16" Mid Length Complete Upper Receiver Group w/ KMR-A15 Handguard 1/8 Twist (Ionbond BLACK)

MSRP: $1,240.95
Your Price: $907.95
(You save $333.00 )
Maximum Purchase:
5 units
5.56 NATO
Barrel Length:
Barrel Style:
Stock Status:

Out of stock

About the BCM® SS410 16" Mid Length Complete Upper Receiver w/ KMR-A15 Handguard 1/8 Twist (Ionbond BLACK)

All BCM® Upper Receiver Groups with a KMR-A Handguard Include:

  • One 3" Picatinny Rail Section
  • One BCM KeyMod 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.***

12 Reviews

  • 5
    It’s awesome

    Standard excellence from BCM. I have an 18” SS410 upper from BCM before, and it was a 1 MOA gun without even trying very hard. I’m excited for range day; I have no doubt that this upper and barrel will produce similar results.

    Beware, once you get that magic 1 MOA AR, you won’t go back to a basic rifle ever again.

  • 5

    Beautiful piece of machinery And fast shipping.

  • 5
    Great products and great service!

    Can’t go wrong with BCM! Great products and great service!

  • 5
    Awesome complete upper!

    Fit and finish is fantastic. Really appreciate buying local high quality American made products. Extremely well made and amazing sub MOA accuracy after short break in with standard M193 ammo.

  • 5
    Candidly Good

    I had heard a lot of rumors about how BCM "filters" their reviews. Regardless, I can only speak to my own experience. My only experience so far with their product is in ordering, and let me just say this. I ordered in the thick of the holiday rush and they got the product out to me way faster than they had to. As in, they probably rushed to get it to me to beat the mail carriers pause for the holidays. That was seriously awesome and put a big smile on my face. I'll update this when I get the rifle running, and if I have any issues that warrant contacting customer support. But so far I'm really happy with this initial impression. Only caveat is that they don't answer phones, but who cares as long as they respond by email quickly. So far so good.

  • 5

    I paired this upper with a complete BCM Lower. Yes paired since I couldn't find a complete setup with Ionbond BLACK barrel.

    This is my first BCM rifle and I am BEYOND IMPRESSED. The fit and finish is exceptional. For a 16" setup it is very light even with a 1-4X scope and is still lighter than my duty setup.

  • 3
    Bolt carrier group

    I bought the complete upper with the BCM bolt carrier and charging handle. Simple to attach to my Spikes lower receiver and seems to fit well. The only problem I have is where the bolt carrier group hits the buffer tube, there's a very small piece of metal that is sticking out. I didn't notice this until after i cycled a few rounds through it. Now I have to replace the buffer tube and file down or sand that piece of metal on the bolt carrier group.

  • 5
    Best bang for your buck, $ for $ bar none!

    Bravo truly makes some of the best products dollar for dollar without exception. Having been in this field for many years it's truly amazing what you get for the cost. I have ordered many different products and gear from Bravo and I am always pleased with the fit, finish and function of every part I've ever ordered. Their quality is exceptional, customer service is superior and accuracy exceptional, because of this I continue to return to Bravo for all my tactical needs!

  • 5
    You get what you pay for

    I purchased this upper as a complete assembly less charging handle. This is my first BCM, but not my first ''top tier'' build. The materials and finish are of excellent quality, and considering it's a stainless barrel, it's very light.

    More importantly, it's very accurate. I have only taken it to the range once so far to break in the barrel, and it was depositing XM193 into a 1.25 inch group at 100 yards using Nightforce glass. At this point, I'm very interested to see what it will do with match grade ammunition seeing as how it's already near MOA with milsurp ammo from the 90's.

    BCM of course shipped the upper well packaged and with several BCM goodies. Shipping time was quick, too. Thanks for the deal, guys!