((So I suppose that means Thaddeus didn't charge his brain. Oh well. Time for Plan D. It stands for Disaster.
And since I assume we are keeping the pills readily available as instructed by Milno:))
Milno had to think fast. Lars had been using his recently-bought amp a good deal and he suspected the paranoid man's mind would not be as easy to bend as the brawl-for-brains thugs the crazy priest had knocked out. "Thomas, prepare the tranq pistol, pop a 'quick' pill. Lars, prepare the tranq pistol, get into the hallway, and act like you're just doing stuff while being watched by the other guard while keeping an eye on that door. Act when it opens enough. I want that man sleeping before he notices something's wrong."
Milno takes a Dex pill and gets into position in the corridor when that door opens, aiming to take the weapon from the man in case he isn't tranquilized fast enough.
Standing orders for Lars and Thomas (TL;DR and also in case one of them doesn't post in time): as above.
Milno stops for a moment, reaches into his bag, retrieves a single, rather large pill, and sticks it in his mouth. He bites down, bursting the liquid capsule and swallows it. Then he waits for a count of five as he feels it go to work. The world seems to slow down, ever so slightly, and takes on a slight bluish tint. He can feel the burning in his stomach.
The door opens, a little bit slower then it normally would, and a hand holding an oversized, almost comical dirty hairy style revolver slides out. The head comes next, but Milno is already moving down the hall at a sprint. By the time the man has turned to see what the noise coming down the hall is, Milno is already on him. He grabs at the target's hand, getting a finger behind the trigger of the revolver so it can't fire, and slaps his other hand over the man's mouth before the scream building in his lungs can escape. Milno puts one leg behind the leg of his target and then shoves forward, forcing the man off balance. The both tumble into the room as Lars jogs up behind them and slips in as well, closing the door as he does. Once the door is closed, he pulls out his tranquilizer pistol presses it against the struggling target's leg, firing once. The man struggles for a few more seconds and then goes limp.
Move to wherever the second guard is, take any weapons and search him for things: keys, radio, etc.
The second guard is standing next to the target's door, ya silly. We'll assume you meant the first guard. You grab his machine pistol and a set of keys he had on him, as well as a wallet, because why not. You find a folding knife in his pocket next to the wallet and take that too, though you doubt it would be of much help in a fight, small as it is.