Easy to use loader helps you quickly fill up your Brownells/Black Dog .22 LR AR-15 conversion magazines without finger strain. Slide the loader over the magazine, push down, insert round, release and repeat until magazine is full. Molded from durable, fiberglass- reinforced polymer that resists impact and solvents to provide years of service. Mfg: Black Dog Machine SPECS: Fiberglass-reinforced molded polymer, black. Fits Brownells, Black Dog Machine, and Ciener magazines for .22 LR AR-15/M16 conversions.