Click-Click-Boom’s fiber laser has the ability to etch and engrave on polymer or aluminum AR-15, AR-10, AR-9 or AR-45 lowers. Shop below to find already completed custom AR lowers done in house with our fiber laser. The etching and engraving process on AR lowers allows for a permanent design, text, or image to be prominently displayed for the life of the firearm. With custom AR lowers, it’s the first step in personalizing your firearm.