CMMG 57AFD1E 5.7x28mm Magazine Extension for FN Five-seveN

Upgrade your FN Gen1 Five-seveN with the CMMG 57AFD1E 5.7x28mm 10-Round Magazine Extension. This durable black extension seamlessly fits your Five-seveN, enhancing magazine capacity without altering the factory design. Featuring a chrome silicon spring for resistance to salt water, it ensures longevity and reliable performance. Easy to install, this extension is ideal for optimizing your 5.7x28mm firearm.