This week; KE Arms Polymer Lowers, Breek Arms AR-15 Charging Handles & Faxon Firearms Carbon Fiber Handguards. Welcome to AT3 Tactical’s Gear Grind! We’re showing you, hands on, reviews of new AR-15 Gear & Accessories that we bring to the AT3 Tactical website. Ever heard of Try-Before-You-Buy? Well, this is the closest you can get to checking out sweet new AR gear without spending a dime!