DLC Finish on Outer Wear Surfaces, Phosphate Extractor and Phosphate/CL Gas Key with OCKS Carrier Key Screws. 

Microbest is one of the finest manufacturers of mil-spec bolt carrier groups for the military and small arms manufacturers. These are individually High Pressure Tested and then undergo a Magnetic Particle Inspection. We recommend degreasing and lubricating before installation. Ships in OEM packaging.

Features:

DLC M-16 BCG

Chrome Lined Inner Bore 

Mil Spec Carrier, DLC

• 8620 Tool Steel
• Full Auto M-16 cut

Mil-Spec Bolt, DLC

• C158 Steel
• Shot Peened
• High Pressure Tested (HPT) 
• Magnetic Particle Inspected (MPI)
• Sprinco Ejector Spring

Mil Spec Extractor, PH

• 4140 Steel, Phosphate Finish
• Sprinco Extractor Spring
• Black Extractor Insert

Mil Spec Gas Key, PH

• 4130 Steel, Phosphate and Chrome Lined
• OCKS Hardware provided by Michiguns
• Properly Staked
• Mil-Spec Opening Verified and Optimum Alignment Checked

Weight: 11.6oz