Full Auto Modification Manual Manual GS116615 US$ 19.95 Pref. Cust. Discount 15% Select Fire Conversions For The Following Weapons. H&K 91, H&K 93, Mac 10, Mac 11, AR-15, Mini 14, M1 Carbine. For academic study only. 5 1/2 X 8 1/2, softcover, illus, 71pp.