This is the Armscor Rock Island TM22 .22LR 25 Round Magazine. With a large capacity of 25 rounds of .22LR, this will keep you shooting longer without the need for frequent reloads. Crafted from durable polymer, this magazine is not only lightweight but also built to withstand the rigors of regular use. The polymer follower ensures smooth feeding of rounds, working in tandem with the robust steel spring wire for consistent reliability and performance. The design is completed with a polymer baseplate that adds to the overall sturdiness while ensuring ease of handling and maintenance. The Rock Island TM22 is a fun firearm to shoot at the range, make sure you have extra mags to keep it running smoothly!