FULL AUTO RATED M16 / AR15 NITRIDE BCG ( Check it out )
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)
- Carrier machined from 8620 alloy, full auto profile, heat treated, Nitrided
- Gas Key machined from 4130 chromoly steel alloy, heat treated and Nitrided
- Bolt precision machined from 9310 alloy; carburized/case hardened, shot peened and Nitrided
- 4140 Tool steel Extractor alloy, hardened and Nitrided
- Extractor Pin, AMS6440/52100 Bearing grade steel retaining pin
- 5 coil, Extractor Spring, 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
- S7 shock resistant tool steel alloy Ejector, hardened, shot peened per ASTM B851/SAE AMS2430, manganese phosphate
- ASTM Grade A 228 wire stock Ejector Spring, heat treated, stress relieved – Tensile Strength of 376,000 PSI Minimum
- Gas Rings, Steel Corrosion Resistant Per AMS 5906 – X3
- 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
- Socket Cap Head Screw, steel, grade 4037 per ASTM, heat treated & manganese phosphate 2x
- Gas Key is installed with Permatex aviation gasket sealer, torqued to 55-foot pounds, pneumatically steaked
- Cam Pin, precision machined 4340 chromoly steel alloy, heat treated and Nitrided
The AR15 NITRIDE BCG is the most important part of your AR15
Although all parts on an AR-15 have their important roles, none compare to the stress a bolt carrier group is put under during live firing.
Andro Corp has featured this BCG since its inception and we knew that if we were going to build a quality firearm, it had to start from its core. To that end, this exact M16 BCG has proven itself at countless machine gun shoots, ten to twelve rifles simultaneously for three to four hours straight and approximately 20,000 rounds of ammunition at each event without fail. Andro has ran the stress test and as a result you don’t have to. This is a Full Auto Rated M-16 / AR15 NITRIDE BCG you can count on. Secondly, we offer this Bolt Carrier Group in a Titanium Nitride Gold polish as well.
All Andro Corp parts are made here in the U.S.A and are backed by its Lifetime Warranty.