Glock 37 10 RD .45 GAP 4th Generation magazine G37 GLOCK-MF37110

Glock 37 .45 GAP 10 round factory 4th Generation magazine GLOCK-MF37110. They have a stiff metal tube encased in the proven Glock high-tech polymer. They resists deformation – even when dropped from great height or exposed to extreme environment conditions.