This is a R&D Cartridge Conversion for the 1851 or 1861 Pietta Navy .36 caliber percussion revolver with loading gate. This cylinder will convert your .36 caliber percussion revolver to use 38 Long Colt cartridge loaded with hollow base or heeled bullets. You can also use 38 Special hollow based wadcutter cowboy ammunition. The cylinders are rated "For Black Powder or Equivalent Loads Only", which includes the current Cowboy Loads on the market. You will need to drill and tap two 6-32 screws and cut the loading groove, complete instructions are enclosed. You must use 38 special hollow base Cowboy ammunition item #AMOU38SHB or 38 long Colt ammunition #AMO38LCB. The cylinder is engraved with naval battle scene. This item must NEVER be used in brass frame revolvers or antique firearms.

(If, after installation, you are unsure of the fit, please take your revolver to a competent gunsmith or contact R & D Gun Shop to make sure you have the cylinder installed correctly.)