I actually put a 507c on a Tavor recently but I haven't had a chance to shoot it yet. It was a left over that I pulled from something else so I figured why not. I like that it's light weight because the gun is already a bit heavier than an AR.
Thinking about putting a magnifier behind it to be honest because why not... even if that does seem counter to my earlier statement about the weight the pistol red dot with a magnifier is lighter weight than anything that isn't an ACOG.