Magpul's Glock magazines rival the reliability and durability of original Glock OEM magazines with the added benefit of additional capacity and other PMAG platform features.With a 21 round capacity this double-stack 9mm Glock magazine is perfect for any double-stack Glock pistol or pistol caliber carbine that accepts a double-stack Glock magazine.These Magpul Glock mags are fully loaded with great features: lightweight fully-polymer with a stainless steel spring highly visible "controlled-tilt" follower removable floorplate paint matrix for marking and more.For serious competitors these magazines meet the 140mm requirements for competition magazines.All shooters can appreciate getting a good grip on the magazine for quick changes using the ridged floorplate as well as using the capacity indicator windows at the 21 15 and 10 round points to quickly determine how many rounds are left. Compatible with all full-size compact and sub-compact double-stack Glock 9mm variantsDrops free when ejected loaded or unloadedRugged Magpul polymer lightweight and reliableMade in the USAGet yourself several of these and use the paint matrix to mark some for FMJ or ball and some for HP defensive loads.These magazines can serve you well in the competition recreational shooting or even for law enforcement roles.Searching for 9mm? Score big savings when you shop our large selection of cheap 9mm ammo for sale.Need new range accessories? Save big when you shop our online selection of Firearm Cleaning Supplies.