I assume you mean "In current or recent production"
My guess, for a BB gun, would be the Walther PPK/s. It's 6.1"
For a pellet pistol, there are too many that are the same size to list here. But most start around 7.1 plus inches in length.
A pellet gun is not adequate for protection, and will get you arrested.
If you are asking about the Crosman C02 pellet pistol then Yes that is what it is designed to power the pistol.
The 15XT is a BB pistol, like the name says. It is not a Pellet pistol. If you can't force is back into the BB holding slide then you might as well buy a new pistol. You will need a .177 caliber cleaning rod and use it to push the pellet back into the BB loading port
shoot a lighter pellet.
A pellet clip is the same as a bullet clip except for pellets. It fits in the breech of a pistol or rifle and holds the pellets that are waiting to be fired. Some clips are in the handle of the pistol.
You will need a .177 caliber cleaning rod to push the pellet back into the loading breech from the barrel.
Neither. Each performs as intended. But the pellet pistol will have more accuracy and power.
See the link below (NO)
Beeman makes the single pump pneumatic .177 pellet pistol called a P3 there are several variations of this German pistol like the "Marksman 2004" made in China and a few other less valuable and less quality.
It was manufactured in 1979
It will shoot pellets or bb's. They normally use an air cartridge.
The Beeman P-17 is a Pellet Pistol not an Airsoft Pistol. Airsoft shoot 6MM plastic BB's. The P-17 shoots .177 caliber Pellets at 410 Feet Per Second. (FPS) considerably faster and deadlier than any airsoft pistol. Do not shoot anyone else with a pellet pistol it could cause serious injury. If you are not sure how to shoot a pellet pistol find someone who understands shooting to teach you. Pellet pistols are beyond BB guns so the P-17 is NOT a BB gun. Be safe.