Glock OEM Magazine Spring Glock 19 & Glock 23. The GLOCKOEM Factory Magazine Spring is a standard factory replacement magazine spring. This spring is designed specifically for GLOCK models magazines. It is made of stainless steel and is made to GLOCK specifications and tolerances, using the same manufacturing and materials as the original springs, ensuring perfect fit and operation. Perfect as a replacement for worn out springs in your existing magazines. Factory Original Part. Replacement Magazine Spring. Reduced capacity magazine. Stainless steel. Natural Finish.