The Topper 88 was designed as a shotgun. If somehow the barreles do fit, I would not fire it unless my medical and life insurance were paid up.
No. HBAR is an acronym forHeavy Barrel. Also, referred to as a bull barrel. These are common barrels used in match or competition model rifles.
Check the receiver and barrel
rifle barrels may have a different external diameter. A rifle that is carried for hunting will usually have a "sporter" barrel- slender, to save weight. Target rifles will have more massive, stiffer barrels for accuracy. Those are "heavy" barreled rifles.
Same as most US Rifles; barrel, receiver group.
marlin made 1993 rifles and 1889 rifles, barrels are about $75 if good, the rifles are about $250 to $500 , all calibers are about equal.
The receiver is the frame of a firearm- in modern firearms, it is the part that the barrel connects to. Antique firearms, such as muzzle loading rifles, did not have a receiver- only the lock, stock, and barrel. (Yes, that is where the expression came from) On a modern firearm, if it has a serial number, it is stamped on the receiver. By US law, a receiver IS a firearm- everything else is parts.
The longest rifled barrel is probably the US Navy 16 inch rifles mounted on battleships-with barrels 66 feet long. Land based- the M65 Atomic cannon- with a 42'9" barrel. For shoulder arms, many muzzeloading black powder rifles used barrels in the 46 to 48 inch range. The Barrett .50 cal sniper rifle has a 29 inch barrel- and most civilian sporting rifles are 26 inches or shorter. Longer does not always mean better or more powerful.
Remington uses "hammer forged" rifled barrels on all production rifles. Their custom shop uses mostly "button rifled" barrels unless the customer specifies a barrel made by a custom barrel maker who uses the "cut-rifled" process to install rifling into a barrel blank.
They are just as accurate as any other power system in air guns. A lot of it has to do with the design and length of the barrel. Rifles barrels are much more accurate than smooth bore barrels.
ALL rifles have barrels that contain "rifling". This is usually in the form of spiral grooves cut into the inside of the barrel- a few have a non-round barrel, with flat surfaces that twist as you go up the barrel. At one time, ALL shotguns had smooth bores- no rifling. However, SOME shotguns now have barrels with rifling, used to shoot slugs. They are still not rifles, as they are meant to shoot shotgun shells.
Yes
You will need a gunsmith.