Description
Glfa barrel/bolt combo ar15.450 bushmaster black nitride
FEATURES
–Barrel & bolt combo set for caliber change in most applications
-M4 feed ramps
-Black QPQ finish (Quench polish quench); Specialized type of nitrocarburizing case hardening that
increases corrosion resistance
-Its is sometimes knows by the brand name of Tufftide, Tenifer or Melonite
Other Features: Quench-polish-quech finish, milspec crmov steel, m4 feed ramps,.750 gas block, 11/16×24 threads, 1:24″ rate of twist includes bolt and barrel to change calibers on a ar-15 m4 to.450 bushmaster
