Microbest AR15 5.56 C158 MPI BCG

Description Coating Options: Chrome w/ phosphate extractor: 01/01/24 batch includes phosphate GAS KEY EXTRACOTR Phosphate chrome lined Mil Spec Carrier 8620 Tool Steel Full Auto M-16 cut Mil-Spec Bolt C158 Steel Shot Peened High Pressure Tested (HPT) – INDIVIDUALLY TESTED Magnetic Particle Inspected (MPI) – INDIVIDUALLY TESTED Mil Spec Extractor – PHOSPHATE 4140 Steel 5-coil Sprinco Extractor Spring O-ring Black Extractor Insert Included Mil Spec Gas Key 4130 Steel Grade 8 Hardware Properly Staked