- Manufacturer: New Frontier Armory
- Model: Spare Firing Pin — Pistol Caliber
- Caliber: 9mm, .45ACP, .40 S&W, 10mm
Spare Firing Pin for AR-9 Standard 9mm BCG (BCGs sold separately).
**NOTE: Many Aftermarket drop in triggers use modified hammers which may not reset properly, or hit the firing pin square on the carrier which could cause firing pins to bind and snap. We recommend using only MILSPEC hammers with any 9mm, .40, or .45 blow back bolt carrier groups.
The New Frontier Armory Spare Firing Pin — Pistol Caliber is proudly MADE IN THE USA by hard working American men and women.