Nickel Boron (NiB) BCG MK1 MOD0Build a Gun![]() The next generation of Ares Armor NiB Bolt carrier group (auto) for an AR15, M16, or M4 is now available. The Carrier is enhanced with a MK1 ModO NiB coating featuring a proprietary method of perfecting the balance of the sodium borohydride reducing agent; a step rarely taken. We then take it one step further to INDIVIDUALLY COAT ALL COMPONENTS before assembly; instead of taking a short cut and coating an assembled unit. All Machining
is completed to Mil-Spec. Properly Staked Gas Key. Gas key is heat treated. An 8620 Carrier and a 9310 Bolt are heat treated, along with the gas key to ensure proper strength. Bolt and Extractor are shot peened before coating and a crane O-ring is installed for superior extraction, along with a properly staked gas key. Proudly made, above and beyond milspec tolerances, in the USA. All Parts Are Properly Heat Treated to Meet or Exceed Industry Quality and Reliability Standards. Written by Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE), Chief of the Firearms Technology Branch MAXIMIZE YOUR SAVINGS There is a flat 10.00 shipping rate, order other items at the same time to maximize your savings. MADE IN AMERICA. *Price and product availability online will vary at Ares Armor locations. YOU MAY ALSO LIKE...
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9310 -VS- C158
Properly Heat Treated 9310 May Surpass C158. 9310 Must be PROPERLY
heat treated, such as ours is, to accomplish this. Mil-Spec is a
standard, Our goal is to surpass it!
Carpenter VIM-VAR 9310 Alloy
(AISI Type 9310)
Nominal Analysis
0.10 C, 0.50 Mn, 3.00 Ni, 1.30 Cr, 0.10 Mo, Bal. Fe
A chromium-nickel-molybdenum carbonizing steel having high harden-ability, good core strength, and superior fatigue resistance.
(AISI Type P6)
(UNS T51606)
Nominal Analysis
0.10 C, 0.50 Mn, 0.30 Si, 1.50 Cr, 3.50 Ni, Bal. Fe
Case-hardening mold steel with exceptionally high strength;