Cryptic Coatings 9mm AR9 Bolt Carrier Group - Black Nitride

A 9mm bolt carrier group designed from the ground up for 9mm -- not adapted from a rifle platform. The Cryptic Coatings 9mm BCG uses a 4140 heat-treated heavy-duty external extractor specifically engineered for 9mm case geometry, a removable counterweight, and an aluminum guide key with self-locking bolts, finished in black nitride.

Features:

• Black nitride finish, 9mm Luger
• Compatible with GLOCK and Colt-style magazines
• 8620 aircraft-quality steel carrier
• 4140 heat-treated external extractor, threaded removable pin
• Removable counterweight, threaded set screw
• Aluminum guide key, self-locking bolts (no staking required)
• Stainless steel firing pin with spring
• Dust cover compatible
• Compatible with mil-spec buffer and spring assemblies
• 13.5 oz weight

The threaded extractor pin allows field removal of the extractor without specialized tools, a serviceability advantage on a blowback platform where extractor replacement is a more common maintenance need than on a rotating-bolt rifle. The removable counterweight lets shooters tune the carrier's mass for their specific buffer and spring combination, optimizing cycling behavior across different setups.

Founded in January 2014, Cryptic Coatings specializes in bolt carrier groups and BCG coatings, backed by a lifetime warranty. Their ever-expanding product line offers reduced friction, longer lifespans, and increased performance over standard finishes.