I just got my new AR15-22 and am wanting some opinions on scopes, but don't want to break the bank. I already have a new BSA Sweet 22 3-9x40, but it looks like it will be huge on this setup. Is this an ok scope for this rifle or should I try to get something that is more compact? I had bought this scope knowing I was going to get a .22lr, but didn't expect to end up with an AR.