This heat treated stainless steel nipple will provide a more even and consistent flow of pressurized gases from the nipple into the ignition chamber. They will virtually eliminate hammer blow back by venting excessive gases through the side ports. (Not recommended for under-hammer rifles or Cap & Ball Revolvers).
For Musket Cap (1/4 x 28 Thread) for most T/C Cap Lock rifles. Uses Musket Caps. (Except Scout, Cherokee, Fire Storm & Seneca).