Nice little henry rifle. Judging from the lack of an insert thats one of the front-loading swiveling barrel type, likely in .22LR or .45 Long Colt. However given the diameter I'd suggest it being a 22, however the 22 model typically comes with an integral forestock, while the 45 does not.

A matching brass Volcanic repeating pistol lies tucked between her cleavage.

I think my nerd glasses just grew 10 pounds after that statement.

Real cool! =3