The Spike’s Tactical M16 Phosphate Bolt Carrier Group (brand part no. ST5BG01) is a complete M-16 pattern bolt carrier group, the same one Spike’s uses on its builds. The bolt, carrier and gas key all carry a phosphate coating inside and out. The carrier and gas key are 8620 tool steel, and the bolt is high pressure tested and magnetic particle inspected. Spike’s laser engraves its Spider logo on the carrier. It suits a builder who wants a proven, mil-spec group rather than an imitation.

Key Specifications

• The package is a complete M-16 bolt carrier group, with the full-auto M-16 carrier profile.
• The coating is phosphate inside and out across the bolt, carrier and gas key, a traditional mil-spec finish.
• The carrier is 8620 tool steel, a mil-spec material for the carrier body.
• The bolt is 158 Carpenter steel or 9310, depending on supply, and it is shot peened.
• The gas key is 8620 tool steel, properly staked with Grade 8 hardware so it stays put under repeated firing.
• The extractor is 8620 tool steel with a phosphate finish, a black extractor insert, an extractor spring and a Viton O-ring.
• The bolt is high pressure tested (HPT) and magnetic particle inspected (MPI), two checks on a part that bears the chamber pressure.
• The firing pin has a hard chrome finish, a hard surface for the part that strikes the primer.
• The carrier is laser engraved with the ST Spider logo.
• The group weighs 11.6 ounces complete.

Frequently Asked Questions

Is this a complete bolt carrier group? Yes. It is a complete M-16 pattern group with the bolt, carrier, gas key, extractor, firing pin, cam pin and retaining pin.

What coating does it have? The bolt, carrier and gas key have a phosphate coating inside and out, and the cam pin and extractor are phosphate finished too.

Is the bolt tested? Yes. Spike’s states each bolt is high pressure tested and magnetic particle inspected.

Buy the Spike’s Tactical M16 Phosphate Bolt Carrier Group

Build around the same group Spike’s puts in its own rifles. Order from Spike’s Tactical and browse more AR bolt carrier groups at our Lubbock, Texas gun shop for fast, insured shipping.