Elite Force HK45 15-Round CO2 Airsoft Magazine Black. If you're the type of shooter who prefers to send out a high volume of shots during games you're going to need multiple magazines. 15 rounds will go quick when your trigger finger gets excited so you better bring a few extra magazines with you onto the field. No one likes running out of BBs in the middle of a gun fight. Make sure you've got plenty of mags to outlast the opposing force Specifications for Umarex HK45 15-Round CO2 Airsoft Magazine: Manufacturer: Elite Force Color: Black Fabric/Material: Metal Magazine Capacity: 15 Round Gun Make: Heckler & Koch Gun Model: Heckler & Koch HK45 Projectile Caliber: .243 Caliber Gun Type: Airgun Package Contents: Umarex HK45 15-Round CO2 Airsoft Magazine What firearm models does the manufacturer say Umarex HK45 15-Round CO2 Airsoft Magazine is compatible with? The manufacturer says that Umarex HK45 15-Round CO2 Airsoft Magazine is compatible with Heckler & Koch HK45HK45 15-Round CO2 Airsoft Magazine Black