Tyrant CNC +4 Mag Extension Features The Tyrant CNC +4 Magazine Extension is machined from aluminum and finished in matte black built specifically to fit Glock 43X and 48 10 round factory magazines. Adding four rounds of 9mm capacity it turns a standard 10 round magazine into a 14 round magazine without altering the pistol s grip length or concealability in any meaningful way. A new properly rated power spring ships with the extension ensuring the added capacity feeds reliably rather than simply stretching the factory spring beyond its design limits. At 1.15 inches in added length and only 1.30 ounces the extension adds minimal bulk for the capacity gained. Installation is designed to be as fast as possible requiring no tools and no magazine disassembly beyond what is needed to swap the baseplate. The extension s smooth chamfered edges give the shooter added control and purchase when seating or stripping the magazine during a reload a detail that matters under time pressure. Because it is purpose built for the 43X and 48 platform fitment is precise rather than a generic one size fits all extension. Shooters carrying a Glock 43X or 48 for concealment who want more rounds on tap without changing pistols will find this a simple direct upgrade. Tyrant CNC +4 Mag Extension Specifications Manufacturer: Tyrant CNC Model: +4 Mag Extension Compatible Hosts: Glock 43X / 48 Color: Black Material: Aluminum Finish: Matte Length: 1.15 Capacity Increase: +4 Rounds Weight: 1.30 oz Available At: GrabAGun