Just got my CZ 455 Varmint .17 HMR today and installed my Mueller 4-16x50 A0 Sport Dot scope and yeah the 50obj is almost on the barrel I have a DIP rail on order but for now, here are some pictures...out the box 2lb trigger.
check out the colt AR pattern 22s. you can barely tell that it isnt a .223 AR. I have an M&P15-22. I like it, but I am king of lusting after the colt/walther AR.
I hear the M&P's are more reliable, and I know from experience that black dog mags/CMMG conversion mags are a PITB to load....
I couldnt comment on reliability of one vs the other. I havent shot the colt/walther 22 AR. The only mags that ill use in the 15-22 are the factory ones. the plinker tactical ones really are a bear to load and are not reliable.
the one thing that i hate about the 15-22 is the barrel system. if you're not careful, it is super easy to rotate the barrel when changing the muzzle device or rail.
My drawbacks on it:
it looks like you're into NFA stuff too, so I'll also mention that having a plastic receiver puts a damper on SBRing the thing. It's probably the only reason why i havent SBRed it.
Also- S&W decided to thread the barrels with AR length threads. to screw on a can, you have to make or buy a thread spacer, which is silly.
The charging handles break. you will want to put a metal one in it.
I still really like the gun, it just isnt perfect.