Shield Arms Magazine Extension Features The Shield Arms Magazine Extension is machined from 6061 aluminum and adds 5 rounds to the Glock 43X and Glock 48 OEM 15 round magazine increasing total capacity to 20 rounds. This added capacity gives concealed carriers and duty users more rounds on tap without switching to a bulkier magazine or holster setup. The extension is engineered specifically for the OEM 15 round magazine and Shield Arms notes it is not compatible with OEM 10 round magazines or their own S-Series magazines so fitment should be confirmed before purchase. An anodized black finish matches the OEM magazine s appearance while adding a layer of wear resistance to the extended baseplate. A plus power replacement spring is included with the extension ensuring that the additional capacity does not come at the cost of reliable feeding or spring tension over time. All necessary installation hardware ships with the extension allowing an owner to complete the upgrade without a gunsmith. Shield Arms backs the extension with a lifetime warranty and its Spring for Life guarantee giving buyers confidence in long term reliability. Note that the magazine itself is not included so this extension is intended for owners who already have a compatible OEM 15 round magazine on hand. Shield Arms Magazine Extension Specifications Manufacturer: Shield Arms Model: Magazine Extension Compatible Hosts: Glock 43X Glock 48 OEM 15-Round Magazine Color: Black Finish: Anodized Capacity Increase: +5 Rounds Includes: Replacement Spring Installation Hardware Available At: GrabAGun