DoubleStar's AR-15 6.8 SPC steel bolt is shot-peened for extra surface hardness, then batch magnetic particle inspected (MPI) for cracks and flaws to ensure reliability and long service life. Comes completely assembled, with gas rings, extractor, and ejector installed.

Specifications and Features:
Caliber: 6.8 SPC, .224 Valkyrie
Material: 158 Carpenter Steel
MPI Tested
Comes Assembled with Gas Rings, Extractor and Ejector
Made in the USA

This product is not returnable. Contact the manufacturer for warranty and assistance.