Diamondback Firearms AR-15 Barrel, 6.5 Grendel 18" 1:8 Twist, Black Nitride Finish - 65M18M50B8R
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Diamondback
Overview
The Diamondback Firearms AR-15 Barrel in 6.5 Grendel features an 18-inch length with a 1:8 twist rate, which allows for effective stabilization of a variety of bullet weights, enhancing accuracy over distance. Its mid-length gas system contributes to smoother cycling and reduced recoil, making it a reliable option for dynamic shooting scenarios. This barrel is commonly found in precision-oriented builds where long-range performance is prioritized.
Specifications
Diamondback Firearms AR-15 Barrel, 6.5 Grendel 18" 1:8 Twist, Black Nitride Finish - 65M18M50B8R
Available Merchants(6)
Prices checked
Price Alert
Build history on GunPartPicker
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 6 retailers we track have it in stock. It dipped to $113.99 at Palmetto State Armory for a stretch in October 2026, well under its usual $130.12, so sales do come around. Buying today, the lowest price is $113.99 at Palmetto State Armory, which matches the best price we saw in October.
Prices checked · refreshed daily across 37 retailers
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Builds Featuring This Part
See all builds →Builds in the community that include the Diamondback Firearms AR-15 Barrel, 6.5 Grendel 18" 1:8 Twist, Black Nitride Finish - 65M18M50B8R
| Build | Parts | Total |
|---|---|---|
 | 16 | $1320.02 |
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