Originally Posted by bobski
ive heard many say lump shoe barrel blocks are weak. has anyone ever seen one fail?
i know the m21 block is the strongest made, in comparison.

By fail, do you mean like this? Sure:

[Linked Image from i.ibb.co]

Strongest made? Not according to this guy:

https://vicknairgunsmithing.blogspot.com/2016/01/an-unbiased-look-at-design-of-american.html

Best,
Ted

__________________________________________________________________________________________________
Ever wonder that you don’t know what you don’t know?