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Diamondback
Overview
The Diamondback AR-15 16" barrel is designed for 5.56 NATO and .223 Remington calibers, featuring a medium profile that balances weight and performance. With a mid-length gas system, this barrel ensures reliable cycling while the 1:8 twist rate offers versatility for stabilizing a range of bullet weights. Builders often integrate this barrel into carbine gas system builds, making it a solid choice for those looking to enhance their AR-15 configuration.
Diamondback AR-15 223 Rem & 556 NATO 16" 1:8 Barrel, Black Nitride Finish - 556M16M50B8R
Diamondback AR-15 223 Rem & 556 NATO 16" 1:8 Barrel, Black Nitride Finish - 556M16M50B8R ranked #34 of the 298 barrels builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #51 of the 815 barrels builders have added. Builds with this barrel are nearly all chambered in .223 Remington, nearly all on carbine-length gas, and nearly all AR-15.
It was hard to find in August 2026, in stock on only 11 of the 21 days we checked, and today all 5 retailers we track have it in stock. The best price crept up from $98.80 to $102.99 over August 2026. Buying today, the lowest price is $86 at BattleHawk Armory, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every barrel by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
The part most often added in each category by the 14 builds that include this one
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Builds in the community that include the Diamondback AR-15 223 Rem & 556 NATO 16" 1:8 Barrel, Black Nitride Finish - 556M16M50B8R
| Build | Parts | Total |
|---|---|---|
 | 12 | $642.27 |
 | 11 | $452.94 |
 | 24 | $1000.40 |
 | 16 | $705.11 |
 | 21 | $664.13 |
2 global ratings
Top reviews
Diamondback 16 inch 5.56 1:8 nitride barrel needed about 100 rounds of break-in before groups tightened up. Now consistently sub 2 MOA with 55gr bulk ball. Black nitride finish is consistent. Solid budget barrel for a parts build.
Diamondback 16 inch 5.56 1:8 nitride barrel shoots flat with 55gr ball at 100 yards. Decent groups for the price tier. Black nitride finish is durable. 1:8 twist handles a range of bullet weights. Solid budget barrel for a parts build.
