I plan to buy a Bushmaster rifle but how will I remember what kind of 223 ammunition to buy?

Yes, they really exist. No, they are not particularly effective in combat. Certain short-barrelled rifles have comparable "pistol" comparisons, so while technically they are "handguns" they're a bit on the big size.

The Kel-Tec PLR-16 and the Olympic Arms OA-93 are good examples of this. Now, take that same "handgun" and put a shoulder stock on it, making it an excellent CQB firearm. One of the major downsides to putting a rifle round in something with a short barrel is that it wastes much of that power, as rifle rounds are designed to burn powder for the longer duration of the projectile traveling down the barrel.

Which means standard rifle rounds put in a "handgun" configuration firearm, even one chambered for it, would have a large muzzle flash and annoyingly low velocity in comparison to the actual rifle for which the cartridge was designed. Becuase unburned powder turns into muzzle flash, and doesn't add to velocity. As far as shotguns go, that's more a question of pattern than velocity, but velocity is affected, too.

As someone else has already asked "what's the use of a Serbu Super Shorty?" I answered that as a concealable entry gun, especially for those of us who can qualify for NFA firearms but can't afford full auto, it poses a formidable, lower-cost substitute for a submachine gun in close quarters. But again, you lose the advantages of a long barrel for a shotgun, which is both velocity and tightness of shot pattern.

The argument is that in close quarters, you're not really worried about the velocity loss nor the shot pattern size -- you want the smack of the shotgun round at close quarters in a package you can carry in a vertical shoulder holster under your vest or jacket so you don't alarm the public or tip off your soon-to-be prisoner. So while such firearms exist, and they do have their practical niche, that niche is small and not without significant drawbacks -- these drawbacks are either acceptable or mitigatable, but such firearms are not considered practical by the mainstream. And recoil is a very real issue -- if you can't stand a 100-round practice range session with one once a week, then you shouldn't be carrying it -- good rule of thumb.

Try that with a Serbu. Let me know how that works out for you; That's why I don't carry or use a pistol grip shotgun anymore -- because it's hard on the body and when you're young, you can do anything. When you get to be my age, you go with what you know and quit beating your body around because you're now feeling the cumulative effects of being immortal when you're young.

But there will always be people who want bigger in a smaller package, and as long as there is a market for such firearms, they will be made. But yeah, the recoil is rather awful.

You have things a little bit mixed. For decades Thompson Center has made single shot pistols in rifle cartridge calibers. These are specifically designed for pistol hunting, NRA Centerfire Pistol Silhouette competition and informal long range target shooting.

You would not want to take a single shot pistol in a rifle cartridge into combat. Yes, you may kill one enemy or attacker - but - the rest of the war or attack is not going to take a 5 minute break while you reload. You are correct - they have terrible recoil.

These pistols, like a fine wine, are an acquired taste. Unless you have really big, powerful hands like a bear - these are not for you. People have broken wrist bones, finger bones, and done major damage to their arms and hands with these guns.

Or the hand being unable to deal with the recoil allows the pistol to jump back and hit the shooter in the head. These pistols appeal to people who are experienced hunters and would like to handicap themselves on a hunt........ make it a bit more challenging. You should surf to SSK Industries web page and look a the different model JD Jones offers.

JD Jones was a gunsmith who started off making custom barrels for the TC 'Contender' and he later went on to create some exteme cartridge that bear his name - they all have "JDJ" added to them. I once worked with a man who had one of these single shot pistols - and 5 travel cases of different barrels for that pistol - about 20 barrels per case. Single shot rifle cartridge pistols - collecting and shooting the different barrels - is whole world of it's own.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.