GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER MAP 18-M100RM1B show more like this Calculated in Cart DACK Outdoors GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER MAP PWS 18M100RM1B show more like this Calculated in cart GunZoneDeals GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER MAP M100RM11-1F show more like this 14.95 Beebe Family Arms & Munitions GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER MAP 18-M100RM1B show more like this Free shipping over $400 (Excludes Ammo) Gman Sport GC_UPC PWS MK1 MOD 1-M/PRO CMPLT RFL LOWER MAP M100RM11-1F show more like this Free on Firearms Acute Firearms GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER MAP M100RM11-1F show more like this 15.00 SHTF Tactical GC_UPC PWS MK116 MOD 1 223WYLDE 16.1 FSC556 MAP 18-M100RM1B show more like this 8.95 The Armories GC_UPC Primary Weapon Systems MK1 MOD 1-M Pro Complete AR-15 Lower Receiver $379.95 18-M100RM1B show more like this Calculated in Cart Primary Arms GC_UPC PWS PWS 18M116RA1B $389.95 18-M100RM1B show more like this Sahuarita Guns GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER $389.95 M100RM11-1F show more like this Free shipping on orders over $300 Skogen’s Gun Supply GC_UPC PWS PWS 18M116RA1B $389.95 18-M100RM1B show more like this $29.99 Handguns, $39.99 Long guns, $19.99 Ammunition, $19.99 Suppressor, $12.95 Everything else, Orders over $1000 ship free United Patriot Supply GC_UPC MK1 MOD 1-M/ MK1 PRO COMPLETE LOWER $389.95 M100RM11-1F show more like this 19.99 The Armory at LTT GC_UPC PWS PWS 18M116RA1B $400.67 M100RM11-1F show more like this Additional, Calculated in cart BFG Outfitters