Phosphate finish
Looks and shoots just like the original - Authentic for all M16 platform builds.
Specifications:
- Compatible with 223, 5.56, 300 blackout
 - Nitride Finish
 - Mag Phosphate Bolt Assembly
 - MPI Tested
 - Made in USA
 - No marking/no Logos
 
For Machines Retaining Pin (Here)