Luth-Ar Rifle Kit Bull 20 W Adj Stock AR Upper and Lower Parts Kit

The Luth-Ar Rifle Kit Bull 20 W/ Adj Stock from Luth-Ar is a complete AR building solution that delivers a ready-to-build platform around a 20 fluted bull barrel upper, featuring a vented 15 KeyMod palm handguard and a robust 1/2 x 28 threaded muzzle on a precision 416 stainless steel barrel with 1-9 right-hand twist for versatile .223 Rem shooting. This kit provides your choice of either the MBA-1 fixed rifle buttstock assembly or the MBA-3 adjustable carbine buttstock assembly, paired with a full LLRPK-1 complete .223/5.56 lower receiver parts kit to streamline assembly while preserving compatibility with Mil-Spec components purchased separately. Optional add-ons like a Velocity Drop-in trigger or The Lower Enhanc-AR Kit let you tailor trigger feel and functionality to your preferred shooting style, ensuring a refined upgrade path without changing the core upper. The kit includes a fully assembled upper assembly with HG-V-15K vented 15 KeyMod handguard, BL-B18FT 20" bull barrel, FTT-EA1 A3 upper receiver, BC-A-223 bolt carrier group, BL-04 gas tube, GB-LP936 gas block, and BL-06-A2 flash hider, along with the rifle-length gas system and M4 feed ramps for reliable cycling. Build flexibility, performance, and precise craftsmanship come together in a turnkey package designed for serious AR enthusiasts.