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Professional Grade Weaponry, by BCM®
Made by Bravo Company MFG, Inc. (BCM) These Barreled Upper Receiver
Groups are designed for shooting professionals with the Mil-Spec
features for the demands of their duty. They are fully assembled,
headspaced, and test fired.
As a note: BCM barrel components are parkerized separately before
assembly. 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.
M4 Feed Ramp Barrel Extension
M4 Feed Ramp Flat Top 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 uppers 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.
USGI 1/8 Twist Rate
The USGI 1/8 twist rate of all BCM Stainless barrels is the
preferred twist rate by the DoD and most professional infantryman. This
twist rate has proven very versatile and can effectively run the new
heavier 5.56 ammo that is hugely popular with military and private
security personal for its’ superior ballistics.
Mil-Spec 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
precision barrels
5.56 NATO Chambers
The USGI 5.56 NATO chamber is the best choice for effective
deployment, reliability, and compatibility, of higher chamber pressures
of military ammo.
Government Barrel Profiles
Duty rifles are built to be carried - day in and day out.
The USGI barrel profiles (often referred to as the Government Profile)
enable the operator to carry their weapon for longer periods of time and
deploy them faster than the heavier commercial H-Barrel counterparts.
The government profile barrel is also compatible with the current M203
mounting systems.
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