I think someone is asking this in your behalf on another forum.
Here's my response:
For a start, the strong-side draw is out.
It's almost impossible to draw from a strong-side holster when you have to get a hand between your body and the side of the chair.
Cross draw works VERY well, as does a modern horizontal shoulder holster.
SELECTED fanny packs work VERY well. The key here is to remember the pack ISN'T hanging down like an apron as is normal, it's LAYING on your lap.
For this reason, pick one that unzips all the way around, and fully exposes the gun for a quick draw.
You're usually better off with a model that uses an internal holster, and BE SURE the holster can be placed into the pack in a vertical position.
Those that are attached in a fully horizontal position are slower to draw while sitting, and worse, won't retain the gun properly with the pack open.
In other words, be careful that when the pack is "ripped" open, the gun won't be flipped out or slide out of position.
The Tunnel-type fanny packs also work for some people, but make sure you can get your hand into the tunnel quickly.
Some people can use an ankle holster from a chair, but this suffers from many of the same disadvantages of the ankle holster as other people have: Getting banged against a car while getting out, requiring baggy, stiff pants both to speed the draw as well as to conceal it, etc.
Black holsters or packs are best, since they blend in quite well with the typical black chair.
MAKE ABSOLUTELY SURE to provide a method of carrying spare ammo. True, most fights are over in less than 5 shots, but if you use a chair, they'll be no ducking, running, or taking cover. You may be required to "stand" and fight it out, so carrying spare reloads is a must.
In all holster/carry methods, make sure the magazine catch on an auto isn't accidentally pressed while getting in and out of cars, or moving around.
This is a critical "watch-out" as it's very common for chair users to check the gun after a day, and find the magazine isn't seated and locked.
In any gun this is bad news, but with a gun equipped with a magazine disconnect, it's catastrophic.
The best preventive is a stiff holster that protects the magazine catch along with a stiffer mag catch spring, if needed.
Practice the draw, and VERY important, practice shooting at close range with the gun held close to the body, to prevent the gun from being grabbed.
From a chair, this is best done by holding the gun braced against the lower chest.
NEVER let anyone know you're carrying, (the word gets out) and NEVER, EVER "threaten" with it. A "bad guy" should realize you're armed ONLY when he sees the muzzle flash as you fire.
Take care in gun selection.
Ideally, you want a "Pull-Point-Shoot" gun. That is, something like a revolver or modern auto like a Kahr Arms that have no external safeties that need to be fumbled with. You simply pull it out and shoot it.
Make sure you have a great modern weapon....A cell phone.
