The KRISS MagEx2 Kit is the ultimate capacity extending base plate for your factory standard Glock magazines Gen 3 and later. This kit is made up of the extended baseplate outer sleeve and extended spring constructed of durable and lightweight reinforced composites. Combining the MagEx2 Kit with the factory standard Glock magazine body and follower ensures reliable feeding toughness and aesthetics for the KRISS Vector.The MagEx2 Kit is caliber-specific and available in 9mm 10mm and .45ACP designed for standard capacity G17 G20 and G21 magazines. This kit increases the overall capacity to 40 rounds of 9mm 33 rounds of 10mm and 30 rounds of .45ACP for your KRISS Vector Glock handgun and Glock magazine-compatible pistol caliber carbine.Features:- Includes extended baseplate outer sleeve and extended spring- 33 Rounds capacity for 10mm- Compatible with Kriss Vector Glock 20 and Glock 40