Description
Andro Corp Gold AR-15 Bolt Carrier Group – G3 High Polish
HP proof testing, 100%using a high pressure M197 or SAAMI commercial equivalent; without evidence of failure
MPI testing after above, 100%inspection per ASTM E1444 using a standard 5 turn magnetizing coil with a current of 200 to 300 amperes; Circular and longitudinal continuous magnetization and a wet fluorescent solution shall be used. Conformance to MIL-STD-410 is required within ASTM E1444
Bolt precision machined from 9310 alloy; carburized/case hardened & shot peened (PVD Coated)
Gas Rings; Steel Corrosion Resistant Per AMS 5906 X3
Extractor; machined 4140 Tool steel alloy (PVD Coated)
Precision machined Extractor Pin and ground AMS6440/52100 Bearing grade steel retaining pin
Extractor Spring; 5 coil, ASTM Grade A 228 wire stock, stress relieved, Tensile Strength of 393,000 PSI Max, 80 Durometer Per AMS-R-6855 black insert
Extractor Spring O-Ring; Viton (FKM) Fluoropolymer Elastomer
Ejector; S7 shock resistant tool steel alloy, hardened, shot peened per ASTM B851/SAE AMS2430, manganese phosphate
Ejector Spring; ASTM Grade A 228 wire stock; heat treated, stress relieved Tensile Strength of 376,000 PSI
Carrier machined from 8620 alloy, full auto profile, heat treated, ultrasonically cleaned, hard chrome bore (PVD Coated)
Gas Key machined from 4130 chromoly steel alloy; heat treated, hard chrome internal (PVD Coated)
Socket Cap Head Screw, steel, grade 4037 per ASTM; heat treated & manganese phosphate 2x
Firing Pin; precision machined 8740 steel alloy; heat treated, precision ground & hard chrome plate
Firing Pin Retaining Pin; carbon steel ASTM A510,heat treated & manganese phosphate
Gas Key is installed with Permatex aviation gasket sealer; torqued to 55-foot pounds; pneumatically staked and break away tests performed to spec
Cam Pin; precision machined 4340 chromoly steel alloy; heat treated (PVD Coated
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