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Daniel Defense
Overview
The Daniel Defense 16" 5.56 M4 Carbine Barrel is designed for precision and reliability, featuring a 1:7 twist rate that stabilizes a wide range of bullet weights, making it ideal for various ammunition types. With a carbine-length gas system and a .750 diameter gas block, this barrel ensures consistent cycling and performance in your AR-15 build. This barrel is typically found in builds that prioritize versatility and reliability, particularly those chambered in 5.56 NATO with a carbine gas system.
Daniel Defense 16" 5.56 M4 Carbine Barrel, 1-7 Twist ranked #25 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 #27 of the 763 barrels builders have added. Builds with this barrel are nearly all chambered in 5.56 NATO, nearly all on carbine-length gas, and mostly AR-15 (80%, then AR-10 20%).
It was in stock most days in August 2026, and today 3 of the 4 retailers we track have it in stock. It dipped to $346.80 at Brownells for a stretch in August 2026, well under its usual $406.99, so sales do come around. Buying today, the lowest price is $406.99 at Ammunition Depot, above August's low of $346.80, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 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:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Daniel Defense 16" 5.56 M4 Carbine Barrel, 1-7 Twist
| Build | Parts | Total |
|---|---|---|
 | 10 | $2920.94 |
 | 23 | $3975.43 |
 | 24 | $3255.63 |
 | 20 | $1866.70 |
 | 13 | $1184.58 |
 | 12 | $3184.78 |
 | 10 | $1661.81 |
| 12 | $1375.36 |
| 22 | $4629.45 |
1 global rating
Top reviews
DD 16 inch M4 carbine barrel has eaten over a thousand rounds without copper fouling becoming a problem. Quick patch and brush cleans it up. 1:7 twist stabilizes anything from 55 to 77gr.
