Elite Force H&K USP C02 Magazine - 18 Round. Constructed from durable aluminum and a high impact polymer this magazine will provide you with years of reliability and efficiency. Once you receive your magazine give it a few shakes and it will re-seal just like a steel magazine ensuring that the coiled spring is secure and in place. Once you release the magazine make sure to give the ejection port a good clean push so that it does not snag on your clothing or drag bag as if it was intended for use with an electronic pistol or a real firearm. This magazine is the perfect addition to extending your airsoft pistols range. Specifications for Elite Force H&K USP C02 Magazine: Manufacturer: Elite Force Color: Black Fabric/Material: Aluminum/Polymer Magazine Capacity: 18 Round Gun Make: Heckler & Koch Gun Model: Heckler & Koch USP Projectile Caliber: .243 Caliber Features of Elite Force H&K USP C02 Magazine 18 round drop free magazine Package Contents: Elite Force H&K USP C02 Magazine What firearm models does the manufacturer say Elite Force H&K USP C02 Magazine is compatible with? The manufacturer suggests that Elite Force H&K USP C02 Magazine is compatible with Heckler & Koch USPElite Force 2275045: H&K USP C02 Magazine - 18 Round