If you downloaded and completed The Secret Armory of General Knoxx then you are well aware of the gargantuan supply of gun chests and weaponry you have access to after defeating Knoxx, but you only have around 2 minutes to collect as much as you can carry.

There is a glitch drop down into the armory without activating the timer. After killing Knoxx, when you are making your way toward the elevator, you get to a hallway with many lockers and ammo crates behind red forcefields. In this part of the hallway, turn around and face the way you came. Walk very slowly back toward where the floor changes from solid gray in the forcefield part of the hall, to the steel floor with the cargo containers. Try to stay in the middle of the hall.

If done correctly, you should fall through the floor where it transitions between the two. Walk back toward the elevator (under the floor), and fall down. And there you have it, no time limit.

When you want to leave, you have to kill yourself, so bring grenades or a launcher. The only drawback is you have to kill General Knoxx every time you want to enter the armory after it has been reset.