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Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly FTBL-B18M Caliber: .223 Remington, Color: Silver/Black, $29.88 Off w/ Free Shipping

Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M
Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M
Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M
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Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M
Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M
2 of 2 images
Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M

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Questions & Answers
Can you shoot a 5.56 through a .223 barrel? Manufacturer Answer

The stainless steel bull barrels should only be used with 223 ammo as the leade throat area is cut to those dimensions for accuracy reasons.

by Luth-AR, Manufacturer, March 12, 2025
See 1 More Answer
is this 223 only or 556 Manufacturer Answer

The 223 uppers are cut and made for 223 only to keep the accuracy as high as possible.

by Luth-AR, Manufacturer, November 27, 2024
View All Q&A You Have a Question? Ask!
Caliber:
.223 Remington
Color:
Silver/Black

Code: 3FN-UFH-LTH53-FTBL-B18M

MPN: FTBL-B18M

UPC: 812058032007

List: $497.95Save $29.88
$468.07

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly

The 18 in MARK12 complete upper barrel receiver assembly is an excellent choice for precision long-range shooting. The barrel is made of 4140 Chrome Molly, providing accuracy and durability. The 1-9 twist rate is optimized for stabilizing heavy projectiles. This assembly includes a Picatinny rail for mounting optics and accessories. Easy to install and use. Designed for serious shooters, this assembly is built to provide exceptional performance and reliability. Starts with our 18 in, 5.56 Mark12 barrel made from 4140 Chrome Molly with a 1-9 in twist mated to our A3 Flattop receiver which includes our bolt carrier, charging handle, forward assist and ejection port cover. The upper is then topped off with our lo-profile gas system and our ergonomic 15 in Palm Handguard with KeyMod or M-LOK slots and a Picatinny top-rail.image

Specifications for Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly:

Manufacturer: Luth-AR
Caliber: .223 Remington
Color: Silver/Black
Magazine Included: No
Country of Origin: USA

Package Contents:

  • Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly

Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly Orderable Models

List of Orderable Models

  • Luth-AR 18 in Bull Barrel Complete Upper Barrel Receiver Assembly, Silver/Black, 18, FTBL-B18M , MPN: FTBL-B18M , UPC: 812058032007 , Code: 3FN-UFH-LTH53-FTBL-B18M
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Last updated 2026-07-05 UTC.