What started out as a slight modification to an existing bolt carrier with regards to ergonomics for slick side uppers and uppers without a forward assist, had turned into a fun project with practical and reliability improvements.

It is Forward Controls Design's view that the factory M16 carriers are very good, and improvements over them would be hard to come by.  Modern coatings have made them easy to clean and quite slick, which they can appreciate.

Forward Controls Design is not into sacrificing reliability for the sake of light weight, and they view cosmetic changes as anything but fashion that have no place on a combat/duty/defense rifle.

The S in SBCG stands for Secure Staking, Slick Side. SBCG carrier has a series of serrations to aid in closing an out of battery bolt on upper receivers without a forward assist.  The carrier still has forward assist pawl notches, and so is compatible with forward assist equipped uppers. 

Each carrier assembly is treated with a durable Nickel/PTFE plating which creates a permanently lubricious surface which reduces the need for lubrication.

Torque Specifcations:

• Install torque spec is 50-58 in-lb
• Removal torque spec is 55-100 in-lb
• Testing  consistently found removal torque of YFS screws averaging around 76 in-lb, with the OCKS consistently at 132 in-lb.

Specifications:

• SBCG bolts are manufactured from Carpenter 158® Steel. Each Bolt is HP/MPI tested and inspected. Each bolt is shot peened and comes with a Sprinco heavy extractor spring and black spring insert. The bolt and cam pin have been NP3 treated to enhance corrosion resistance and carbon build up.
• Shot Peened
• Sprinco 5-Coil Heavy Duty Extractor Spring
• Black Insert
• 100% HPT & MPI
• SBCG carriers are 8620 steel and machined  to USGI specifications. The M16/M4 carrier includes a mil-spec gas key. The gas key is heat treated per TDP specifications and NP3 coated. The gas key is secured to the carrier via OCKS (Optimized Carrier Key Screws), torqued to spec values, and properly staked.