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Kriss KVAMXKBL25: The Kriss MagEx 25+ is a magazine extension kit for your 45 ACP Glock 21 magazine. The MagEx adds an additional 12-round capacity to your Glock 21 magazine (not included), increasing it to a total of 25+1 rounds. The MagEx maintains functionality with your 45 ACP Glock 21 pistol.
The Kriss Glock 21 21SF magazine extension kit will add 12 rounds to your factory Glock magazine for a 25+ round total capacity. The extension consists of a sleeve base plate and extended magazine spring. The factory follower is used with this extension kit. The back of the base pad extension has round count witness holes to keep track of your ammo. This kit works best with newer magazine bodies pre-ban magazines may have reliability issues. - Increased Capacity 12 Additional Rounds - Secure Two-Piece Extension - Extra Power Spring