i understand these are for plinking, but wondering which is better and why?

I have read several articles that people preferred the MP15-22 better. However, for specifics, go to google and simply type in "S&W MP15-22 vs GSG5, and I can guarantee you will get several articles. Also, go into your local gun store and simply hold each one to get a feel for it.

GSG-5 is fun for the MP5 style feel. I've heard that it's a pain to break down to clean though.

The 15-22 is the easiest gun I have seen to break down and clean. But either is a good choice depends on your tastes. Also either will have a ton of aftermarket accessories.

the gsg isnt bad to do a minor cleaning barrel bolt area never broke down completely but heard its a pain in the a$$. i would buy the gsg again for sure. for the 15-22 if you dont have an ar just buy a lower build it for you and buy a 22 upper for it this way down the road you could get a 223 upper and really have fun then

Why one over the other... This is either do you want an Mp5 clone or an ar clone in a 22lr?

 

I can see the arguements and discussions over Colt 22lr, Hk 22lr or Smith 22lr, all clones of the same gun.... but the GSG -5 and M&P 15-22 are apples and oranges.

FWIW, and I did extensive research before I bought my 15-22 earlier this year (all of Jan, Feb, March to research, bought on April 1 I believe), it is one of if not the most amazing lil packages I have ever bought.... Completely customizable, every where I go I get compliments, and it shoots LIGHTS OUT, I mean pinpoint accurate, dead nails tough , reliable as a Cold War AK, fast fast fast, it's just basically my baby. I mean I could see me Mad=Max'in it up, with my 930 SPX and Savage Mark II crisscrossed across my back, my G23 sidearm, and carrying the 15-22 as I scour the hinterland with my Australian Cattle Dog by myside...

 

Despite my active imagination, it really is THAT good Now a real, full-auto, SEAL style MP5 is my probable, #1 overall wishlist gun, but the GSG that is not...

 

I would and probably will buy one just cause, but still, its A) not a MP5 and B) its not a 15-22.

 

Your Mileage May Vary, of course, Sir.