MRP Barrel 5.56 10.5 1:7 Chrome Lined

LMT Defense · Barrels

Best price

$422.99at Brownells

checked Sep 30, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$422.99checked Sep 30, 2026	Check store	Buy at Brownells

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

About this part

The MRP Barrel 5.56 10.5 1:7 Chrome Lined is a 5.56 / .223 barrel from LMT Defense. One store lists it, Brownells at $422.99.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer: LMT Defense
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

The LMT MRP 5.56 NATO barrels are a proprietary design for the LMT MRP AR-15 Upper Receivers.

A unique design, the Lewis Machine & Tool AR-15 MRP Upper Receiver allows the end user to swap barrels quickly and conveniently for flexibility in caliber, length, and even gas system.
These 5.56 NATO barrels feature a DI gas system, chrome lining, a 1-7” twist rate, and are available in 10.5”, 14.5”, and 20” lengths.

5.56 NATO
MRP compatible
1-7 twist
Chrome lined
• A2 style flash hider

Give your LMT MRP Upper Receiver caliber versatility with a 5.56 NATO barrel.
Note: 10.5” barrel should not be used with MRP Rifle length Upper Receiver.

All NFA rules apply!