Agency arms vs. springer precision - Agency Arms Sig Sauer P320 9mm +5 Pistol Magazine Extension

I have both and prefer the Springer Precision much better. The Springer Precision is quick and simple to install, the set screw is in the ideal location, it cost less, and it doesn't rattle compared to the Agency Arms.

The Agency Arms is difficult to install because the spring on the base pad side isn't wound 360 degrees at the end. I know this for a fact because I compared it to the Springer Precision spring. When you try to slide the base pad over the Agency Arms spring, it will pop back out and if you're not careful, the sharp end of the spring will get hung up on the base pad and tear up the anodized finish.

Also, the set screw is poorly design and makes the magazine rattle. Not worth the price unless you must have an Agency Arms base pad. There are better quality options out there at a lower price.