Hello ive got an issue that i wanted to get some input on. So ive got a flat top carbine with no iron sights on it (i have a set of flip ups already)and i was wondering what the easiest way to go about putting them on would be; should i replace the gas block with a reciever height railed block or should i go the free floated rail path? Also anyone have experiance with the clamp on gas blocks? How well do they stay put\do the screws back out?

