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 This .177 caliber long-nose bolt is stainless steel with black-oxide finish. The long-nose (often called a probe) pushes the pellet further past the barrel port which creates a better seal between the pellet and barrel. This produces more consistent velocity and tighter groupings. The tapered contour of the nose allows it to work with larger and longer pellets. It's 8-32 thread and fits all the bolt handles we have listed.

 To convert a .22 caliber model to .177 you only need this bolt and a .177 barrel.