This is the ProMag Sig P226 9mm 20-round magazine. 

If you want to increase your capacity without losing much maneuverability, this 20-round aftermarket magazine is ideal. 

ProMag is well-known for its high-quality yet affordable magazines; this one is no different. Constructed from corrosion-resistant, heat-treated steel and featuring an anti-tilt polymer follower, you’ll never have to worry about its durability or reliability. 

Even better, ProMag makes these right here in the USA! From home protection to a weekend range trip, these 20-round magazines will ensure you’re well prepared.  

You might as well grab a few at this price! You can thank us later.