Rosco Manufacturing Bolt Carrier Group, 556NATO/300 Blackout, Fits AR-15, Phosphate and Chrome lined Finish, Black ROS-BCG-002

These 5.56 / 300 BLK Bolt Carrier Groups are Phosphate Coated with Chrome Lined Gas Key & Bolt Channel" Full-Auto rated" properly staked" and the bolts are Matched to the barrel. Their Rosco Phosphate Bolt Carrier Groups are designed to meet the modern-day carbine shooters requirements. For their Phosphate Bolt Carrier Groups – they choose to team up with the best – Microbest" so the end user has dependability time after time" every time. They have also balanced input from their consumers and military end users in order to bring you the product you need" not just the one they want to sell you. These BCG's are to MIL Specification and have a properly staked gas key along with a chrome lined coating for extended performance. They also feature a Shot Peened/ MP tested Matched bolt (with upgraded extractor) which is designed to lock up perfectly with their extensions for extreme accuracy. These BCG's are made to withstand Full-Auto rated fire and unforgiving use from the end user.

Carrier Material: 8620 Steel

Gas Key: 4130 Steel, attached with Grade 8 hardware, properly staked

Cam Pin: Hardened 4340 Steel

Firing Pin: 8740 Steel, Heat Treated, Mil-Spec, Center-less ground, Hard Chrome Plated

Bolt Material: C158, , Phosphate Coated, MPI/HPT

Extractor: 4140 Steel, Heat Treated, Shot Peened

Ejector: S2-S7 Tool Steel, Shot Peened

Phosphate/Chrome BCGs ship with upgraded Sprinco Extractor Kit

Finish:	Phosphate
Manufacturer:	Rosco Manufacturing
Manufacturer part #:	ROS-BCG-002
Type:	Bolt Carrier Group
Sub Category:	Bolts & Bolt Carrier Groups
Color:	Black