What do bipods have to do with this, we should be allowed to
use any rest we choose. There won't be a single person that can do this offhand.
Plus
magnified is magnified. If you choose to use a 1-4 or a 6-24 should be up to you, at 100 yards it won't make much difference.
If you make too many rules and categories it's just gonna get stupid. Lets keep it simple. Run whatever you want but post pics and give details of your gear.
Magnified and non magnified should be enough.
1- Yes I'm serious, this is just a fun challenge. I fully expect to be out shot by a full target AR when I'm using my 12.5" piston system AR. We are all free to use any gear we choose so if you want to take things that seriously go ahead and use your super duper AR with huge target scope and handloads you've been tailoring for 3 years. I won't be crying if you shoot a tighter group than me but please don't start calling others cheaters or making up excuses if someone out shoots you with a 14.5" Norinco
2-Your right, this is not complicated so don't try to make it complicated. Great idea about the bipods since shooting off of bags pretty much always gives better groups anyway.
3- So you are a master shooter that is going to disadvantage yourself to make it fair for the rest of us? Prone is probably the best position to shoot from especially if you use bags so go ahead and we will all freely shoot from any position we are comfortable with as long as it's 100 yards away from the target.
4- No thanks, I like it the way the OP has laid it out so far. Nice and simple and just a friendly challenge to get us out shooting and to take some pics of the results.
That is all, you may now go back to your regularly scheduled boredom