TR-Enabling limited run of obsidian AR-15 bcg's. Each AR-15 bolt carrier comes assembled with an M-16 Obsidian bolt and components. Obsidian is a revolutionary coating that offers outstanding performance and appearance. This new coating recorded a coefficient of friction of .06, outperforming all other currently offered bolt carrier coatings. Because of its application process the coating is evenly applied, at a thickness of .0005”, on all surfaces of the assembly. TR Enabling’s Obsidian coating is rated at a hardness of RC70. Obsidian is rated to withstand prolonged exposure to extreme temperatures, far beyond that which a bolt carrier is exposed. Possibly one of the most notable features of this coating, for the average user, is the extreme cleanability it provides. Resisting carbon build-up and maintaining its performance between cleans is where this coating truly shines. After several thousand rounds, the shooter simply wipes the carbon from the surface. The coating can be cleaned by all conventional means (solvent bath, supersonic submersion and more) however, these methods are generally not necessary. Obsidian is capable of operating without lubrication, once the break-in period of 300 rounds is complete, though it is not recommended. TR Enabling recommends a light grease known as XF-7, however any popular firearm-rated lubricant will suffice.

Specs (Coating):

Coefficient of Friction: .06

Rockwell Hardness: RC70

Thickness: .0005”

Application Method: Electro-less Plating

Color: Graphite

Composition: Nickel T

Specs (Assembly):

Carrier Material: 8620 alloy steel

Bolt Material: Carpenter 158, MPI

Extractor: M-16 Extractor, Auto Spring, Buffer and O-ringed

Gas Key: Machined Billet Steel, Staked to Spec