CMMG's Mk3 carbine action spring is a factory replacement buffer spring for CMMG Mk3 .308 rifles with a carbine-length buffer system. A fresh action spring keeps the rifle cycling and returning to battery reliably. Replace it as part of routine maintenance. It is a genuine CMMG part.
- Fits: CMMG Mk3 (.308), carbine buffer system
- Type: action (buffer) spring
- Manufacturer part: 38CA98E
