Glock manufactures firearms in Austria. Actual Factory Glock 27 in.40 S&W with a 9-round magazine. With our 80% frame, these will fit your 40S&W subcompact pistol build. Only things we trust are sold. We had no trouble selecting the Glock mags to be a part of our full subcompact 40S&W construction kit due to their smooth and dependable feeding. Glock manufactures firearms in Austria.