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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
Prices checked
Diamondback AR-15 223 Rem & 556 NATO 16" 1:8 Barrel, Black Nitride Finish - 556M16M50B8R ranked #80 of the 329 barrels builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #49 of the 1,047 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.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 4 of the 5 retailers we track have it in stock. Prices barely moved in October 2026, holding around $96.82, with no real sale all month. Buying today, the lowest price is $86 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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 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 | $582.77 |
 | 11 | $459.67 |
 | 24 | $1068.64 |
 | 16 | $943.01 |
 | 21 | $658.17 |
1 global rating
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.
