SA XDM 3.8" & 4.5" .177-cal CO2 Blowback BB Pistol Magazine, 20rdsIt's never fun to run out of ammo or air. Prevent this bummer in your airgun shooting sessions and pick up a couple extra 20 round . 177 cal. BB magazines for your Springfield Armory XDM 4. 5' standard or 3. 8' compact blowback pistol so you can shoot more and reload less. SA XDM 3. 8' & 4. 5' CO2 Blowback . 177 Pistol Magazine, 20rds Capacity: 20rds Fits both 4. 5' standard and 3. 8' compact SA XDM CO2 pistols Holds (1) 12 gram CO2 cartridge Features