This is the FMK Firearms 9C1 Gen2/3 9mm 17-round magazine. 

On the hunt for a few additional factory magazines for your FMK 9C1? If so, then look no further!

This extended 17-round magazine is perfect for those looking for a few extra rounds or to add a little length to the grip for better control. The steel body and anti-tilt polymer follower provide the perfect balance of durability and reliability. 

From defending your home to spending a relaxing day at the range, these 17-round magazines will get the job done!

Throw a couple of these factory FMK magazines in your cart, and get ready for the range!