The .224 Valkyrie / 6.8 SPC II Bolt is ready for use in any Mil-Spec Bolt Carrier. Crafted from Mil-Spec Shot Peened Carpenter 158 to offer the best case hardening known for parts subject to heavy shock and wear.
Bolt Material: Mil-Spec Shot Peened Carpenter 158
Coating: Manganese Phosphate
Extractor Material: Tool Steel
Extractor Insert & Spring: Black Insert with 4 Spiral Spring
Q: Will this bolt work with other company's rifles and upper halves?
A: This bolt assembly will work with any other company's mil-spec bolt carriers and upper halves designed for the .224 Valkyrie and 6.8 SPC II caliber.
This is the second one of these I have purchased from Stag....
Perfect and good price.