Conventional belt holsters--something to carry a favorite revolver or semiauto in for a day of hunting or working on the ranch--share many qualities with both belt scabbards and range holsters. Knowledgeable old-timers usually choose leather for a reason: it molds to the body, is quiet and none-abrasive when banged against the tractor seat. A sturdy holster that keeps the gun snug and prevents it from flopping around is desirable, and it certainly needs to retain the gun should you take a tumble. For revolvers, a classic western (not Hollywood) style rig with a hammer loop works well. Typical thumb break rigs are good for semiautos, along with myriad other types.
Basic Rules: Concealed Carry Rigs
A good holster must be made for your pistol. Generic, one-size-fits-many models don't do a good job of retaining your pistol and are generally not very comfortable.
A good holster should be molded tight enough to retain your pistol without straps or tension screws, and it should cover the trigger guard. It should also have a reinforced mouth that keeps the empty holster open for easy one-handed re-holstering. The holster's belt loops or slots must match your belt so the holster stays put for all-day comfort and a sure, speedy draw.