Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Chrome
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Expo Arms
Overview
The Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group features a chrome finish that enhances both durability and ease of maintenance. Designed in the M16 style, this BCG is built to function reliably in mid-length gas systems, ensuring smooth cycling and optimal performance. You'll commonly find this component in builds that prioritize precision and reliability, particularly those chambered in 5.56 NATO.
Specifications
Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Chrome
Available Merchants(1)
Prices checked
Stock Alert
October 2026 on GunPartPicker
Expo Arms 5.56 NATO Complete Mil-Spec M16 / AR-15 Bolt Carrier Group - Chrome ranked #52 of the 258 bolt carrier groups builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #150 of the 552 bolt carrier groups builders have added. Builds with this bolt carrier group are mostly chambered in 5.56 NATO (77%, then .223 Wylde 17%), split between mid-length (44%) and carbine-length (37%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, but today the one retailer we track is out of stock. Prices barely moved in October 2026, holding around $149.95, with no real sale all month. Listed prices start at $149.99 at Primary Arms for when it comes back.
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Expo Arms 5.56 Nato Complete Mil-Spec M16 / Ar-15 Bolt Carrier Group - Chrome
| Build | Parts | Total |
|---|---|---|
 | 33 | $2846.78 |
 | 26 | $1238.49 |
 | 19 | $4685.85 |
| 20 | $1369.36 |
 | 10 | $906.72 |
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