Playing “Under The Gun,” is the worst position in poker. You are always at a disadvantage in this position, no matter what cards you are holding. You are first to act preflop so raising too much with pocket aces often scares your opponents and you don't get any action. Slow playing aces is a recipe for disaster. So, what do you do?
The best practice; playing under the gun with aces is to min-raise. This sends a message to your opponents. Normally, experienced player won't mess with you by reraising because they feel you are strong since you raised out of position. They will often fold or smooth call. I don't recommend playing big with pocket aces under the gun if you get more than two callers to your original min-raise. Pot control is necessary when playing only top pair, especially against three or more players. Inexperienced players will most likely test you with a reraise holding a mediocre hands like KJ or AJ. This is your opportunity to 4 bet and build the pot preflop. At the same time isolate the inexperienced player by getting everyone else to fold. Once you got the fish hooked, go ahead and chomp it down.
(Here is a short clip of a shark chomping away on a hooked fish.)
Most inexperienced players limp-in with aces under the gun hopping for a raise. I don't recommend you do that. So always be cautious when you see someone limping-in under the gun and firing big on the flop. This should set an alarm for aces.
Having pocket aces under the gun can get you in trouble, so try to avoid playing big against more than two opponent. Be ready to fold if you get the hunch that they may have two-pair or better. Save your stack for a later opportunity to play big in late position with a strong hand like pocket aces.
Play Hard, Play Smart and Play in Position.
Here is the link to the edited pic above: https://www.google.com/search?q=gun&client=ms-android-verizon&prmd=nimv&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiNn8Cx643PAhWQpYMKHdgMBmAQ_AUICCgC&biw=360&bih=560#imgrc=SD0NlwXA7tevvM%3A