Luth-AR | Rifle Kit Bull 20 | .223 Rem | 416 SS

This Luth-AR rifle kit provides the major components to assemble a functional AR-style rifle, delivering a 20 fluted bull barrel in .223 Rem with a 15 KeyMod palm handguard and a choice of buttstock assemblies. The kit ships without a stripped lower receiver and includes a complete lower parts kit and fully assembled bolt carrier. It is intended for users building or assembling a civilian AR platform for precision-style and field applications.

Product Specifications

• The kit includes a fully assembled upper with a 20 fluted bull barrel and an HG-V-15K 15 KeyMod palm handguard.
• The listed caliber is .223 Rem.
• The barrel material is specified as 416 SS.
• The threaded barrel thread pitch is 1/2 x 28.
• The handguard model is listed as HG-V-15K 15 KeyMod palm handguard.
• The kit includes your choice of MBA-1 fixed rifle or MBA-3 adjustable carbine buttstock assembly.
• The kit contains a complete lower parts kit identified as LLRPK-1 for .223/5.56.
• The assembled upper includes an FTT-EA1 A3 upper receiver.
• The bolt carrier included is a BC-A-223 fully assembled bolt carrier for .223.
• The gas block is specified as GB-LP936 with a diameter of .936.
• The barrel twist is listed as 1-9 RH with 6 lands and grooves.
• The barrel feed ramp is specified as M4 and the barrel is button broached.
• The flash hider is listed as BL-06-A2 A2 flash hider.
• The UPC for this product is 812058030508.
• The catalog lists a weight value of 11.368 (units not specified in source data).

This kit is designed for builders who want a robust, accuracy-oriented AR upper on a 20 fluted bull barrel while retaining flexibility at the stock and lower parts level. It pairs a durable 416 stainless barrel with a KeyMod handguard and includes the core components needed to complete a rifle-grade assembly once a stripped lower is supplied.