The Shield Arms SIG P320 Magazine Extension adds 5 rounds of 9mm to both 15 round and 17 round OEM SIG P320 magazines, fits both generation 1 and generation 2 magazines. Our unique, easy access floor plate design allows you to easily access the spring and follower without having to remove the extension from the magazine body. Comes with a 100% lifetime warranty, and the Shield Arms Spring for Life guarantee.
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