Red White and Blue has imported this Korean manufactured 26 round GLOCK 21 mag. This black polymer metal lined extended magazine is a great value for when you need more firepower in your GLOCK 21 30 21SF 30SF or 30S. This magazine is also the perfect choice for your .45 Auto KRISS AR-15 Kel-Tec or Just Right Carbine that accepts GLOCK magazines.