SOT Enhanced All-Chrome Bolt Carrier Group

Description

There is nothing wrong with that — phosphate holds oil, and both parts work perfectly well in it. But it does mean the two components that sit deepest in the fouling are the two that give carbon the most to key into. This group is chrome on every surface: carrier, bolt, extractor and gas key. Everything the fouling touches is the same slick, hard, easily wiped surface.

Underneath the finish it is the standard Microbest specification: 8620 tool steel carrier in the full-auto M16 profile, C158 bolt, shot peened, individually High Pressure Tested and Magnetic Particle Inspected, with Sprinco extractor and ejector springs and a properly staked 4130 gas key on Grade 8 hardware. Microbest build bolt carrier groups for the military and for other small arms manufacturers; this is the same production, sold in OEM packaging without the branding markup.

SKU: BCG-MBEST-CHR-E

Full specifications, fitting notes and warnings: SOT Enhanced All-Chrome Bolt Carrier Group — product page.

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.