A 30 round magazine for the popular CMMG, Ciener, Spikes, Tactical Solutions, and .22lr conversions for the AR-15. This magazine features an injection molded housing and follower constructed of impact resistant glass filled nylon polymer for durability. The spring is precision wound from heat treated chrome-silicon wire for reliable feeding. Please note: We are still testing, but early indications are that this magazine will be compatible with: Atchisson, Ciener, CMMG, Model 1 Sales, Spikes Tactical, Tactical Solutions, Target Master, Raven with CMMG working parts. Please call the shop for the latest test results.