BCM® SS410 18" Rifle Complete Upper Receiver Group w/ KMR-A15 Handguard 1/8 Twist

MSRP: $1,042.95
Your Price: $830.95
(You save $212.00 )
(79 reviews)
SKU:
BCM-URG-18-SS410-KMR-A-15
Maximum Purchase:
5 units
Caliber:
5.56 NATO
Barrel Length:
18in
Barrel Style:
SS410
Handguard:
KMR-A15
Right hand side view of the BCM® SS410 18" Complete Upper Receiver w/ KMR-A15 Handguard 1/8 Twist.
Stock Status:

About the BCM® SS410 18" Rifle Complete Upper Receiver w/ KMR-A15 Handguard 1/8 Twist

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 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.***

79 Reviews

  • 5
    BCM SS410 18" Rifle Upper

    Upper was shipped right away and arrived quickly, like all purchases from BCM, with a great deal of extras (Wifey likes the new hat). Upper was put together perfectly. Only have 50 rounds through it (XM193) so far, but, after sighting in, was putting rounds through the same hole consistently. Can't ask for anything better. Thanks, BCM, for another great purchase and purchasing experience. You have a customer for life.

  • 5
    Very nice

    Quality upper, handguard is excellent, getting better groups than I expected with xm193.

  • 5
    Fantastic quality

    I ordered yet another upper, this time an 18" SS with a 15" kmr-a. It arrived extremely fast, only a couple of days. My wife even looked at me and said "didn't you just order that?" Anyway everything was amazing and that is why all my rifle are BCM.

  • 5
    BCM Quality

    BCM makes a high quality weapon system, and this one did not disappoint. A+ Fit, function, and finish.

  • 5
    AR15

    I received my order quickly and it came loaded with extra gifts I especial like the bravo company hat. I shot the gun this last week and it worked flawlessly and had 1 in groups at 100 yards.

  • 5
    Great Product, excellent service.

    Excellent upper, perfect for 3 gun.

  • 5
    Excellent Customer Service

    BCM has the best customer service that I have seen out of any company. I had a question about the upper that I had purchased so I sent off an email and they responded almost immediately. I still didn't quite understand the response so I email them a picture of what I had in question. Not only did they respond again, but they even took the time to enlarge my image and make a clear notes onto it and emailed it back.

    I will definitely be buying more BCM products in the future.

  • 5
    Superb Piece!

    BCM SS410 18" Rifle Upper Receiver Group w/ BCM KMR-*ALPHA* 15" Handguard 1/8 Twist

  • 5
    Exceeded my expectations

    Ordered on Friday received on Tuesday.. super fast turnaround and amazing quality I look forward to seeing what it's truly capable of. I will definitely purchase from Bravo company again!