MCR 5.56x45 NATO 12.5" 1-7 Twist Heavy Barrel Assembly

Name: MCR 5.56x45 NATO 12.5" 1-7 Twist Heavy Barrel Assembly
Brand: FightLite Industries
Availability: OutOfStock

FightLite Industries · Barrels

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Best price

$729.99at Brownells

Out of stock checked Oct 1, 2026

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Store	Price	Availability	Buy	Add to build
Brownells Best price	$729.99checked Oct 1, 2026	Out of stock	Buy at Brownells
OpticsPlanet	$729.99Salechecked Oct 1, 2026	Out of stock	Buy at OpticsPlanet

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$729.99	$729.99	$729.99
OpticsPlanet	$729.99	$729.99	$729.99

Since Sep 28, 2026.

About this part

The MCR 5.56x45 NATO 12.5" 1-7 Twist Heavy Barrel Assembly is a 12.5" 5.56 / .223 barrel from FightLite Industries. It's sold by 2 stores, all at $729.99.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Muzzle thread: 1/2x28 · Muzzle devices
Barrel length: 12.5" · Handguards

Specifications

Manufacturer: FightLite Industries
Platform: AR-15
Caliber: 5.56 mm NATO
Barrel length: 12.5"
Thread pattern: ½ x 28

From the manufacturer

ARES Defense MCR spare barrels are ready swap with your existing quick change barrel system. Barrels include adjustable gas system. Available in 16.25" or 12.5" lengths. Chambered in 5.56x45mm NATO & feature chrome lined, 1-7 twist bores. Muzzle include A2 flash hider & A 1/2-28 threads. Fit ARES Defense MCR weapon systems only. Mfg: Fightlite Industries