The JP Enterprises Full Mass Operating System (FMOS) is a superior quality replacement bolt carrier for AR platform rifles. The engineering and design poured into the remake of the AR bolt carrier give you a component that doesn’t simply replace your old Mil-Spec bolt carrier but surpasses it in performance by leaps and bounds. While the JP Full Mass Bolt Carrier remains a drop in replacement, it is easier to clean than the original Mil-spec carrier furnished with your AR and improves accuracy.
FEATURES:
- Extended forward assist serrations and dust cover notch
- More reliable operation
- Polished surfaces
SPECIFICATIONS:
- Caliber: 5.56 NATO / .223 Rem. / 300BLK
- Weight:
- FMOS Bolt Carrier: 8.82 oz.
- Enhanced Bolt Assembly: 2.1 oz.
- Finish:
- Bolt Carrier: QPQ Black
- Enhanced Bolt: DLC
- Material:
- Bolt Carrier: Stainless Steel
- Enhanced Bolt: SAE 9310 Steel
- Profile: Semi-Auto
COMPATIBILITY:
- AR-15
INCLUDES:
- FMOS Bolt Carrier Group
- FMOS Bolt Carrier with gas key installed
- JP Enterprises AR-15 Enhanced Bolt Assembly
- Cam pin
- Firing pin retainer
