Manufactured To Rigorous Quality Control Standards; Available In 5.56mm Or 6.8mm SPC
Steel bolt is shot-peened for extra surface hardness, then magnetic particle inspected (MPI) for cracks and flaws to ensure reliability and long service life. Models available for rifles chambered in 5.56mm/.223 or 6.8mm SPC. Comes completely assembled, with gas rings, extractor, and ejector installed.
AR-15, Issue:10, Page:011
Big Book Catalog, Issue:67, Page:011
SPECS: Carpenter 158 steel, phosphate coated, matte black. 6.8mm SPC bolt installs in mil-spec AR-15/M16 carriers and requires a 6.8mm barrel and magazine for a 6.8mm SPC conversion.