This is the Magpul AMAG 21 SG9 9mm 21-round magazine for Sig P320, M17 pistols. 

Magpul has proven itself for many years with its PMAGs and is ready to do it again with the new AMAGs, this time for the Sig P320!

Constructed from corrosion-resistant stainless steel and featuring an anti-tilt polymer follower, you can rest easy knowing that durability and reliability will never be an issue. On the back of the magazine, you’ll find precision-cut numbered witness holes that provide instant capacity checks. 

As if all that wasn’t enough, Magpul added a flared and removable floorplate that features a paint pen dot matrix on the bottom for identification marking. With the P320 being versatile enough to fill almost any role, you can never have too many magazines!

These AMAGs for the Sig P320 will likely fly off the shelves, so we’d recommend adding some to your cart before you forget!