I see some Cimarron BP revolvers are labeled with acronyms "CH", "FS" and "CFS". I believe "CFS" stands for "cut for stock". Anyone know what the other two mean? I'm thinking maybe "CH" is "case hardened" and "FS" is "fixed sights"? The reason I ask is because I see the same Uberti models for sale (specifically 1851 Navy and 1848 Walker) on the same website but just with these different acronyms. Figured someone on here would know before their customer service.