The Galil tears down like a typical ak..mostly. the top cover is a little more difficult to put on with that sight. it's a tight fit on the galil and usually you would just take and knock the dog pee out of it and it pops down. can't do that with that prism. the 21st tec breaks down like an ar.
Next was the Galil Ace, not a very good trigger and the hardest recoiling 762x39 i have ever shot and i have shot a lot of them. same distance but used the bipod. shot 60 rounds each gun. i did have to move the prism a bit as it was hitting low left as you can see.
So took the pinko commie guns to shoot, first is a Tec21st, company is no longer around, owner went to work for Auto ordinance. These are superbly made guns. built like a tank. hardly any recoil. Was shooting a tad bit low but i didn't change it. target is at 60 yards and shooting off a front rest