Similar to H&K's Model 91 series of rifles, with the additions of a bipod, quick release barrel, and belt feed mechanism with drum hanger. Hooded pin front sight on barrel shroud and an elevation adjustable rear sight. The left side of the frame is marked "DAVE'S GUNSHOP, INC./ CARSON CITY, NV 89701/ HK21-Semi Auto Rifle 0004-S" above the belt feed. Semi/ safe trigger group with green plastic pistol grip matching the shoulder stock. With two 20 round magazines and a short belt of dummy ammunition. Includes two model 11 conversion kits from belt fed to mag fed. Model 21 parts kits are now banned from importation.