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FN America
Overview
The FN AR-15 M16 Barrel is a 16-inch M4-profile barrel designed for use with 5.56 NATO ammunition, featuring a mid-length gas system that provides a balance of reliability and reduced recoil. With a 1:7 twist rate, this barrel stabilizes a wide range of bullet weights, making it versatile for different shooting applications. This barrel commonly appears in mid-length gas system builds chambered in 5.56 NATO, catering to builders seeking a reliable and accurate setup.
Specifications
Available Merchants(8)
Prices checked
Price Alert
October 2026 on GunPartPicker
FN America FN AR-15 M16 Barrel 16 Mid-Length 5.56mm was the most added barrel on GunPartPicker in October 2026, ahead of the Daniel Defense 16" 5.56 NATO CHF Mid-Length 1:7 Government Contour AR-15 Barrel, with about 6% of all barrels added to builds. That's its 2nd straight month at #1. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on mid-length gas, 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, and today 5 of the 8 retailers we track have it in stock. Buying today, the lowest price is $199.73 at KY Gun Company, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by hundreds of builds that include this one
Geissele Automatics G2S Two Stage AR-15 Trigger .154"
Bravo Company M16 Bolt Carrier Group Black
PSA AR-15 "Stealth" Stripped Lower Receiver
Sons of Liberty Gun Works AR-15 Gas Tube Stainless Steel Mid-Length
KAK Industry Low Profile Gas Block .750 Steel Phosphate Finish Black
Expo Arms® M-LOK Patrol Series AR-15 Handguard - Black - 15"
Builds Featuring This Part
See all builds →Builds in the community that include the Fn Ar-15 M16 Barrel 16 Mid-Length 5.56mm
| Build | Parts | Total |
|---|---|---|
 | 8 | $1439.68 |
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