Criterion Barrels 6.5 Grendel AR-15 Barrel - Hybrid Profile - Rifle Length - Stainless Steel - 18"

Name: Criterion Barrels 6.5 Grendel AR-15 Barrel - Hybrid Profile - Rifle Length - Stainless Steel - 18"
Brand: Criterion Barrels
SKU: 65G18S-HY12
Price: 332.49 USD
Availability: OutOfStock

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Criterion Barrels

Overview

The Criterion Barrels 6.5 Grendel AR-15 Barrel features an 18-inch M4 profile, designed to offer a balance of weight and performance for enhanced accuracy and handling. With a 1:8 twist rate, this barrel stabilizes a variety of bullet weights, making it versatile for different shooting applications. The rifle-length gas system and .750 gas block diameter contribute to reliable cycling and reduced recoil, making this barrel a solid choice for precision-oriented builds or those aimed at competitive shooting.

Specifications

MPN65G18S-HY12

Barrel ProfileM4

Caliber6.5 Grendel

Thread Pitch5/8x24

Twist Rate1:8

Barrel Length18

Gas System LengthRifle

Gas Block Diameter.750

FinishStainless

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Criterion Barrels 6.5 Grendel AR-15 Barrel - Hybrid Profile - Rifle Length - Stainless Steel - 18"

Available Merchants(1)

Prices checked Oct 11, 2026

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Optics Planet

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$332

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Build history on GunPartPicker

Builders on GunPartPicker first added the Criterion Barrels 6.5 Grendel AR-15 Barrel - Hybrid Profile - Rifle Length - Stainless Steel - 18" to a build in February 2026.

It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $332.49 at Optics Planet for when it comes back.

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Updated Oct 12, 2026 · from real builds on GunPartPicker · Prices checked Oct 11, 2026 · refreshed daily across 37 retailers