What gun shoots 13 rounds?
143524
The magazines of many pistols can hold 13 rounds. And, if the magazine holds 13, you can chamber one, then eject and top off the magazine, giving you 14-round capability.
142450
Automatic colt pistol
38980
I'm not sure there is any that exist, as far as what a person could carry.\nThe USAS-12 and MK3A1 Jackhammer are the best known autos. MK3A1 fires 240 rpm, which also the drum magazine can be removed and affixed to a detonator to be used as an anti personnel mine.\nThen there's the AA12 which has a rpm of 300.\nI'm no expert but I honestly don't think you'll find a 12 gauge that can fire that fast without ripping your shoulder off/extreme barrel rise. And since shotguns fire shot/fletchettes/whatever and useless at long range, I don't see any viable reason why they would make a shotgun that a person couldn't ideally use.
660374
Ihavea great anschutz mod.1451 that shoots great, but if you want something little cheaper check out CMP for a kimber mod. 82 it's a great gun and it's only $600. They also have other great quality rifles for good  prices.
451527
10 rds \nhttp://www.gunbroker.com/Auction/ViewItem.asp?Item=46569290
720632
Smith and wesson designed it for the FBI about 10 years ago.Go to S%W website. It is basically a 10mm . I have a CCP and it is my favorite. 1 shot =1 kill.
72528
TOW rocket launcher (Tube launched Optically sighted Weapon)\n\nStinger Missile\n.50 Caliber machine gun\nM16A2 rifle\nM1911 semi-automatic pistol\netc etc
634887
Here you go.\n\nhttp://world.guns.ru/smg/hk_mp5_blow.jpg
792589
Just do 4 divided by 13 which comes out to .308 when you round... the overall division comes to 0.3076923.
42982
Probably the Beretta 92F or the Glock 17, both of which are 9mm.
656476
General Electric Vulcan Machine Guns. 6,000 rounds per minute in either 7.62mm or 20mm canon rounds. Used on gun ships prinarily. They would do a nice job.
265533
the most lethal gun is a AK-47
1020792
Action Express is part of a caliber name.  There were several of these rounds made.   41ae and 50 ae to name two.  I own a 41AE .  While these guns are very accurate and fun to shoot ammo cost is very high for ammo.
868640
as a small arms instructor for the navy i know the are two semi(single shot) and full auto for the a3 for the m16a4 there are 4 semi auto, burst and full
1058033
you are thinking of .177 caliber.  that's a bb or pellet gun.
396657
Have shot shot guns. 16 gage shot gun and single shot 410. Have shot 25 semi-auto hand gun, a 22 semi-auto and my husband's, snub nose 38 revolver and his 357 magnum revolver. I am a woman, by the way.
219798
According to the site AK-47.us, "the standard AK-47 or AKM fires a 7.62x39mm round with a muzzle velocity of 710 m/s. Muzzle energy is 2,970 joules."\n\nNot a shooter, no recommendations on ammo. However that site has some nasty things to say about surplus ammo. Then again, the want to sell you their stuff.