FN 15 Upper Receiver Assemblies are meticulously built in FN’s Columbia South Carolina manufacturing facility alongside US Military contract M4 rifles. Each upper receiver is supplied with and M16-style Bolt Carrier Assembly with properly staked gas key and Carpenter 158 Magnetic Particle Inspected (MPI) bolt, charging handle and FN’s venerable cold hammer-forged barrel.
- Proprietary CrMoV Barrel Steel
- Hard Chrome Lined to Mil Standard 171
- M4 Feed Ramps
- High Pressure Tested
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