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Spike's Tactical HPT/MPI Shot Peened BCG 223/5.56 AR15 M16 PREMIUM BCG AT AN OUTSTANDING PRICE!
Bolt carrier group specifications-
-Mil-Spec 8620 tool steel M16 bolt carrier w/shrouded firing pin. Added weight to improve cycling and reduce felt recoil. -Carrier has 5.3.1.2 MIL-STD-171 phosphate finish inside and out with 1.2.2.2 MIL-STD-171 hard chrome bore.
-Laser engraved with ST Spider logo (visable through ejection port door opening).
-Mil-Spec tool steel carrier key.
-Carrier key has 5.3.1.2 MIL-STD-171 phosphate finish inside and out with 1.2.2.2 MIL-STD-171 hard chrome bore.
-Carrier key is attached with Grade 8 hardware and properly staked per the Mil-Spec.
-Bolts are CNC machined from Carpenter No. 158®.
-Bolts have 5.3.1.2 MIL-STD-171 phosphate finish inside and out.
-All bolts are shot peened per the current Mil-Spec to relieve metal strain -All bolts (NOT JUST A SAMPLING) are Individually High Pressure Tested (HPT) and then Individually Magnetic Particle Inspected (MPI).
-Tool steel extractor, shot peened, 5.3.1.2 MIL-STD-171 phosphate finish, fitted with a Mil-Spec black extractor spring insert and Mil-Spec Viton o-ring to avoid most extraction problems.
-Mil-Spec firing pin with 1.2.2.2 MIL-STD-171 hard chrome finish.
-Mil-Spec cam pin with 5.3.1.2 MIL-STD-171 phosphate finish.
-Mil-Spec firing pin retaining pin with 5.3.1.2 MIL-STD-171 phosphate finish.  |
