
This upper is our most budget-friendly option and a DIY enthusiast’s dream. It offers excellent value for those planning to use an optic or customize their barrel length, provided they have a lathe for the modifications.
Note: These are stripped receivers so they will not come with any internal components. MK IV uppers are compatible with all MK IV pistol frames. They are not compatible with MKIII pistol frames.
Being a serialized item, an FFL is required.