Pack of 10 Glock Compatible Plus 2 9mm Magazine Extensions10 Universal GLOCK Plus Two Magazine Extensions Designed to function without the use of inserts Fit: 9mm, . 357 Sig, 40 S&W Glocks; Gen 3 and Gen 4 Glocks Models: 17,19, 22, 23, 26, 27, 31, 32, 33, 34, 35 Will only fit 10 round magazine for 26, 27, 33 sub compact models Adds +2 for 9mm, +1 for . 357 Sig and 40 S&W Note: Certain states have laws regarding high capacity magazines. These states include, but are not limited to California, Hawaii,