Description We know you want more than 10-rds, so upgrade with this .22LR, 18-rd capacity mag before heading out for your next day at the range. Constructed of DuPont Zytel-base polymer, the magazine is lightweight. Itâs also built with an injection-molded magazine follower, which meaning enhanced strength. Now add the featured heat-treated chrome-silicone spring, which lets the mag withstand impact loading; you get a durable mag. Grab a few of these USA-made mags and be ready for your next range day.