Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Phosphate
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Expo Arms
Overview
The Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group is designed for reliable performance in semi-automatic and full-auto applications. This M16-style bolt carrier, finished with a phosphate coating, ensures durability and corrosion resistance, making it suitable for a variety of shooting environments. You'll often find this component in builds utilizing a carbine gas system, particularly those chambered in 5.56 NATO.
Specifications
Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Phosphate
Build history on GunPartPicker
Builders on GunPartPicker first added the Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Phosphate to a build in March 2026.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today the one retailer we track has it in stock. Prices barely moved in August 2026, holding around $139.95, so there haven't been real sales lately. Buying today, the lowest price is $139.95 at Primary Arms, which matches the best price we saw in August.
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