FN AR-15 M16 Barrel 10.5 Carbine 5.56mm
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FN America
Overview
The FN AR-15 M16 Barrel features a 10.5-inch M4 profile designed for 5.56 NATO caliber, making it an ideal choice for compact builds that require maneuverability without sacrificing performance. With a carbine gas system length and a twist rate of 1:7, this barrel ensures reliable cycling and stabilization of a variety of bullet weights, enhancing accuracy and reliability. This barrel is commonly found in builds that utilize a carbine gas system and are chambered in .223 Wylde, providing versatility for both 5.56 NATO and .223 Remington ammunition.
Specifications
September 2026 on GunPartPicker
FN America FN AR-15 M16 Barrel 10.5 Carbine 5.56mm ranked #77 of the 250 barrels builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #142 of the 821 barrels builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 4 of the 5 retailers we track have it in stock. It dipped to $234.26 at KY Gun Company for a stretch in September 2026, well under its usual $279, so sales do come around. Buying today, the lowest price is $234.26 at KY Gun Company, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Bravo Company AR-15/M16 .750 Low-Profile Gas Block
Bravo Company M16 Bolt Carrier Group Black
Geissele Automatics Airborne Charging Handle Ddc
Bravo Company Manufacturing BCMGUNFIGHTER KAG - KeyMod - Black
FN FN15 M4 Collector AR-15 Stripped Lower Receiver Anodized Black
Hogue Pistol Grip Rubber Black
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.
Builds Featuring This Part
See all 1 →Builds in the community that include the Fn Ar-15 M16 Barrel 10.5 Carbine 5.56mm
| Build | Parts | Total |
|---|---|---|
 | 19 | $2071.46 |
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