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Questions & Answers
does the collapsible stock option also come with the BCG? Manufacturer Answer

Rife build kits from Luth-AR come with complete bolt carrier groups.

by Luth-AR, Manufacturer, June 8, 2022
I don't see how this is considered light weight? I just finished complete upper/lower build 6 lbs. 8 oz. Manufacturer Answer

Weight is relative and oppinions vary. It weighs just abot 2oz more then a standard M4 with our kit having a 15" free float handguard and a rifle butt stock having a 5.15 oz buffer.

by Luth-AR, Manufacturer, November 27, 2024
2 Models Available
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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 5.56 Lightweight Kit Minus Lower Receiver

With this Luth-AR 5.56 Lightweight Minus Lower Receiver Kit, you can build out an entirely new AR except for the stripped lower receiver. Luth-AR designed these AR Handguards & Forends with a lightweight barrel made for durability and easy carrying that won't add extra weight to your build. The Luth-AR 5.56 Lightweight Minus Lower Receiver Assembly Kit includes an upper receiver, a handguard and other essential components that will help you assemble a powerful rifle. The bolt carrier group and charging handle that come with this Luth-AR 5.56 Lightweight Minus Lower Receiver Rifle Kit w/ Barrel are incredibly durable and will provide a smooth shot every time. Also, the barrel has a 1-9 twist rate and 6 lands and groves so that heat can be more easily removed. This full upper assembly kit is a great way to build your own AR except for the stripped lower receiver. Get your Luth-AR 5.56 Lightweight Minus Lower Receiver Rifle Kit w/ Stock Assembly to build a reliable and powerful firearm at a great value.image

Specifications for Luth-AR 5.56 Lightweight Kit Minus Lower Receiver:

Manufacturer: Luth-AR
Caliber: 5.56x45mm NATO
Overall Length: 26 in
Barrel Length: 16 in
Barrel Profile: Light Weight
Gas System Length: Carbine Length
Barrel Twist Rate: 1-9
Number of Sling Points: 2
Handguard Type: Free-Float
Muzzle Device: A2 Flash Hider
Finish: Manganese Phosphate
Color: Black
Gun Model: AR-15
Fabric/Material: 4140 Chrome Moly
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 15 in
Handguard Style: Round Rail
Gun Rail: KeyMod
Gun Type: Rifle
Gun Make: AR Platform
Weight: 11 lb
Bolt Carrier Group Included: MIL-SPEC
Charging Handle Included: MIL-SPEC
Magazine Included: No
Condition: New
Additional Features: Will need GT-CUP
Country of Origin: USA

Features of Luth-AR AR-15 Complete Lightweight Barrel Kit w/ Fixed Stock

  • Lightweight Government profile 5.56 mm barrel
  • 5.56 mm
  • 4140 Chrome Moly
  • Threaded Barrel - Thread Pitch 1/2 x 28
  • Gas Block Diameter .750
  • Gas Tube Length - Carbine
  • 1-9 RH Barrel Twist
  • 6 Lands and Groves
  • M4 Feed Ramp
  • Button Broached

Package Contents:

  • Luth-AR 5.56 Lightweight Kit Minus Lower Receiver
  • Lightweight 5.56 mm Barrel Upper with 15in Keymod Palm Handguard.
  • Buttstock Assembly (Black).
  • Complete Lower Parts Kit.
  • Complete Bolt Carrier Group and Charging Handle

Luth-AR 5.56 Lightweight Kit Minus Lower Receiver Orderable Models

List of Orderable Models

  • Luth-AR Lightweight Kit Minus Lower Receiver, w/ Fixed Stock, 5.56mm, 26in, 16in, Light Weight, Carbine, 1x9, 1/2x28,Picatinny, Key MOD, A2 Flash Hider, Anodized, Manganese Phosphate, Black, RKL-16-1 , MPN: RKL-16-1 , UPC: 812058030539 , Code: 3FN-UFH-AR15C16556F-RKL-16-1
  • Lightweight Kit Minus Lower Receiver, w/ Col. Stock, 5.56mm, 26in, 16in, Light Weight, Carbine, 1x9, 1/2x28,Picatinny, Key MOD, A2 Flash Hider, Anodized, Man. Phosphate , MPN: RKL-16-3 , UPC: 812058030546 , Code: 3FN-UFH-AR15C16556F-RKL-16-3
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Last updated 2026-07-25 UTC.