Description
Replacement firing pin and retaining pin for Mk57 Bolt.
WARNING: California`s Proposition 65
Specifications for CMMG Mk57 5.7X28mm Firing Pin Kit:
| Manufacturer: | CMMG |
| Caliber: | 5.7x28mm |
| Gun Make: | CMMG |
Package Contents:
- CMMG Mk57 5.7X28mm Firing Pin Kit
- Mk57 (5.728) Firing Pin
- Firing Pin Retaining Pin
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