I put a Speedbead on my Stoeger P350. It was NOT easy to install it, I'll say that. To get it zeroed in was difficult too. The adjustment ran out on the standard mount, and I added the 1/8th adjustment plate, but it wasn't enough with that either. Finally added the 1/4" plate to the 1/8" AND that was enough.
TO BE VERY CLEAR, I think this outfit is awesome. I've noted a couple things that might put off the potential buyer, however, don't let that stop you from buying this rig, as it was all well worth it for me. I love it.The tiny screw driver that comes with it for adjustment to windage and elevation isn't large enough & if you aren't careful IF will strip the screw face very easy.
When shooting, it is great. I like that the light gets on target quick & you don't have to worry about getting your aim perfect. That dot does not move, no matter where you face & eyes are positioned. I'll be using it for night hunting predators also, so that is great for that in mind.
Be careful when you grip your gun, as the kick gave my thumb a cut 2 times. The Burris Fastfire is right next to my hand placement & the kick was enough to draw blood! I put on a shooting glove the last couple rounds, and no more problem.