I impulse bought this and am very happy that I did. It has shot everything I have tried with no malfunctions other than CC Quiet which doesn't work in any of my semi automatics. I'm going to try my suppressor on it next and was wondering if other ammunition besides CCI Suppressor will function in the M&P? I don't know how to post pictures here so maybe someone could enlighten me? Thanks.

To post pics, you need to select "Go Advanced". Then on the toolbar, you'll see a paperclip icon for Attachments. The "Choose File" to pick from your "library" (browse to the right folder as needed). Select the pic and click on Upload. Repeat for other pics as needed. Then click on the paperclip again, you'll see the images you uploaded. Select it/them and they will insert at your current cursor location. You may need to edit the post to position the pics in the right place. You may also need to resize the pics before posting so they don't "blow up" the reader's screen.

An alternative is to upload them to a hosting site like IMGUR (or others) and copy/paste the links using the [img] tags into your post. The images will appear inline with your post.

Congrats on your new pistol. For other ammo, I would try the other major brands and look at their subsonic offerings. I have no suppressor so I can't recommend specifically but Federal/American Eagle, Winchester, Aquilla and others all offer subsonics. The American Eagle are copper plated.

MY MP22C is pretty flexible on ammo, best with MiniMags but once broken in, good with most ordinary .22s. About any 40 grain bullet will be subsonic for suppressed shooting, I am seeing maybe 950 fps at best.

Some very mild target ammo is too soft, and on the other end, Stingers and Silvertips don't work at all.