BCM Rifle Company.
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BCM® A4.
Click for BCM® A4 Rifle Specification.
Barrel Profile.
11595E.
Running a 20" barrel with a 1/7 twist, every BCM® barrel uses the same Independently Certified Mil-Spec 11595E Barrel Steel (CMV) used in the USGI M16 family of rifles. Built to perform in extreme environments, BCM barrels are stronger and more durable than typical commercial barrels, thanks to high concentrations of carbon and/or vanadium in the alloy.
HPT & MPI.
BCM® barrels also undergo a M197 HPT (High-Pressure Test), commonly referred to as a proof load, rating each barrel for 70,000 psi. This hardening is followed by a MPI (Magnetic Particle Inspection) to detect any possible flaws in the barrels surface, with both circular and longitudinal magnetic fields per ASTME1444-01 in the current Military-Specification.
USMC Issue.USMC.
Specced to match the standard issue M16A4 fielded by front-line USMC units, the BCM®A4 features detachable carry handle irons, a double heart shield handguard and a Mil-Spec F-Marked Forged Front Sight.
 
Carry Handle Iron Sights.Carry Handle Irons.
A detachable 600 meter carry handle with back-up iron sight featuring windage and pre-set elevation adjustments (from 1-600 yards) mount perfectly onto a tactical rail or can be removed in favor of an optic of choice.
BCM® Professional Grade Weaponry® BCM Rifle Company.
Exacting construction and rigorous durability are the standard for every weapon system that comes off our line. BCM® Professional Grade Weaponry® are hard use tools, built to perform in combat where unfailing performance is the only standard for men and machine.
Chrome Bore and Chamber.Chrome Bore and Chamber.
A chrome lined bore and chamber is now a worldwide standard in the industry for a battle rifle. The chrome bore and chamber is harder than the barrel steel and on the USGI M16/M4 rifles will aid in chambering, extraction, and reliability. It increases velocity, and also resists against fouling and corrosion from extended use in the field. This gives the end user a longer barrel life with less required time in maintenance and cleaning.