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WARNING
You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box.
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The ST1 model was their original model so its versatility keeps it as a #1 seller. Although designed to help with wider high cap magazines there is also a groove inside the mag well front and rear to align a 1911 style magazine. Years later and more innovations came along Adco expanded to a complete line as we offer now. If it is not and ADCO it's not a Super Thumb. The one that guaranteed not to break. ST1 21.5mm x 32.5mm • 1-1/4” x 13/16"
Fits Most Double-Stack Magazines :
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