Meta Tactical Llc APEX2021BK21 Apex Carbine Conversion Kit 16" 45 ACP, Black, Polymer Bullpup Chassis with Adj. Stock, M-Lok Handguard, AR Style Pistol Grip, Muzzle Device, Fits Glock 21 Gen 3-4/SF $499.99
Aero Precision APAR308505AC Assembled Receiver 308 Win 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for M5 Platform $209.99
Tactical Solutions TSGCON19STD TSG-22 Conversion Kit Compatible w/Glock 19/23/32/38, Black 22 LR 4.80" Barrel, Steel Includes Magazine $320.00
Tactical Solutions TSGCON17TE TSG-22 Conversion Kit Compatible w/Glock 17/22/34/35/37, Black 4.80" Barrel, Includes Magazine $480.00