if that face part is indeed causing a firing hazard, i would recommend buying a replacement part to swap out. buymilsurplus.com
does sell the bits and pieces of the mosin nagant rifles, and could be the solution to the problem.
i know some mosins front face can be misshapen and have been known to cause issues, i just wanted to rule out the first case i knew.
If zombies, i have gone for big guns, will return soon !
if your here to take away my guns, please note you will be in range of said guns
current guns projects : Howa GK 1500, TM15 custom