I recently bought an all matching 42 "byf" Mauser Luger known to some as the "Black Widow" model. I want to shoot it, but I fear breaking one of the all matching parts in the toggle assembly. I found a complete original 42 DWM toggle assembly online and was wondering if it has a chance to just drop in and function. I've read some snippets here and there that people swap the assemblies to prevent original parts breakage, but I want to make sure before I order it.