BCM MK2 Standard 16in. .223/5.56 Assembled Upper Receiver Group w/ MCMR-15 and BCG

<p>This proprietary design offers enhanced rigidity over the USGI product. The increased rigidity limits barrel deflection which aids in consistency/accuracy.&nbsp;Less flex also reduces premature damage, wear, and failure of bolt lugs from misalignment.&nbsp;A gas expansion chamber is machined above the charging handle track, combined with dual vents machined at the rear (each side, above charging handle latch) help to redirect and vent gas away the shooters face.&nbsp;</p><p><br></p><p>The USGI 1/7 twist rate of all of the BCM barrels is the preferred twist rate by 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, private security personal, and personal defense for its' superior ballistics. Military specifications require that barrels undergo a HPT (High-Pressure Test) load as a part of quality assurance procedures. Commonly referred to as a proof load, the M197 HPT is rated for 70,000 psi. </p><p>BCM barrels are proof loaded and then MPI (Magnetic Particle Inspected) to detect any possible flaws in the barrels surface. The barrels are MP inspected with both circular and longitudinal magnetic fields per ASTME1444-01 (current Mil-Spec) to assure a high quality finished product. All BCM barrels are marked HP MP as our proof load marking.</p><p>Caliber:</p><p>5.56 NATO</p><p>Barrel Length:</p><p>16in</p><p>Barrel Style:</p><p>BFH</p><p>Handguard:</p><p>MCMR-15</p><p>Upper Receiver:</p><p>MK2</p>

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