Home / Bolt Carrier Groups / Rosco Manufacturing / AR-15 BOLT CARRIER GROUP PHOSPHATE 5.56MM
AR-15 BOLT CARRIER GROUP PHOSPHATE 5.56MM
Bolt Material: C158, , Phosphate Coated, MPI/HPT
Cam Pin: Hardened 4340 Steel
Carrier Material: 8620 Steel
Ejector: S2-S7 Tool Steel, Shot Peened
Extractor: 4140 Steel, Heat Treated, Shot Peened
Firing Pin: 8740 Steel, Heat Treated, Mil-Spec, Center-less ground, Hard Chrome Plated
Gas Key: 4130 Steel, attached with Grade 8 hardware, properly staked
Phosphate/Chrome BCGs ship with upgraded Sprinco Extractor Kit

Specifications

Brand
Rosco Manufacturing
MPN
ROS-BCG-002
UPC
850039693113

Description

AR-15 BOLT CARRIER GROUPS 5.56MM
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