CMMG 90BA4D7 Firing Pin will fit:
CMMG Mk9 9x19 rifle
Quarter Circle 10, QC10, 9x19 Bolt
RRA 9x19
Emtan MZ-9, 9x19
Schmeisser Gen1 9x19
The CMMG Mk9 firing pin is a replacement for damaged or worn AR-9 firing pins and features a durable hard chrome finish.
(Important info: Schmeisser Gen2 Firing Pin is 69,8mm long)
(Important info: Ordinary AR15/M16/MkG/MkGs/Mk10/AR15 Firing Pin is 83,25mm long)