DRS Magazine Mini - 5,5 / .22FX DRS Mini Magazine This FX DRS Mini magazine is made of impact resistant synthetic material. Its, as the name implies, very small. As a result, the mini magazine barely extends higher than the rail, so you can mount a rifle scope very close to the FX DRS air rifle. The magazine is available in the following calibres and accompanying magazine capacity: These FX DRS Mini Magazines are available in the calibres: 4. 5 mm . 177 16 rounds 5. 5 mm . 22 14