I would like some advise on the Barska red dot scopes
which would be used on my mp 15-22
A friend gave it to me and it appears to be new
he found it at a yard sale for 5.00
Any comments good or bad will be appreciated

Here's a link to some reviews on Amazon assuming you have the same version.

Your friend overpaid.

It's the same as all the other Chinese labor camp red dots of that style, just with a different label slapped on it.

It will work ok. You'll need a riser for it. Half inch riser should work or 3/4.

TURN IT ON!!! does it work? does it only have one dot? if so you are in luck. slap it on and zero it. Use it till it breaks. i dont think the recoil of your .22lr will be a problem for it. Cant beat a free red dot. However if you plan to get a real one spend some money. Bushnell trs25 for the minimum. I have a Primary Arms with 2.5x magnification that i love. Ultimately its your rifle use what you enjoy and can afford and above all else HAVE FUN WITH IT!!! Enjoy!

OH and speaking from experience when it comes to red dots YOU GET WHAT YOU PAY FOR!! just check out the number of threads here

You don't need a riser unless you want to co-witness iron sights. All thru the 3 years from 2011-2014 when I was shooting the 15-22 in speed competition I never used a riser. Didn't matter if it was a 40mm tube red dot or a reflex one (Both TruGlo ones, the best of the under $100 red dots).