Among today's 5.56 NATO rifles, the H&K 93 is a more unique option, but the HK fans out there that have these guns love to run them. To keep these guns going, a solid magazine is needed, and these H&K 93 polymer magazines are built right to keep your range days active and trouble-free. To keep things affordable, the magazine body on each of these H&K 93 mags is molded from DuPont's Zytel-based polymer, which has a reputation for durability. Inside the magazine, you'll find a long-lasting magazine spring made from heat-treated, chrome-silicon wire, which is topped by an injection-molded follower. These H&K 93 magazines are designed for use with 5.56 NATO and .223 Rem. only and hold up to 30 rounds. The magazine is made in the USA. An Affordable, Durable Polymer Magazine for Your HK 93 Rifles Among today's 5.56 NATO rifles, the H&K 93 is a more unique option, but the HK fans out there that have these guns love to run them. To keep these guns going, a solid magazine is needed, and these H&K 93 polymer magazines are built right to keep your range days active and trouble-free. To keep things affordable, the magazine body on each of these H&K 93 mags is molded from DuPont's Zytel-based polymer, which has a reputation for durability. Inside the magazine, you'll find a long-lasting magazine spring made from heat-treated, chrome-silicon wire, which is topped by an injection-molded follower. These H&K 93 magazines are designed for use with 5.56 NATO and .223 Rem. only and hold up to 30 rounds. The magazine is made in the USA.