help with identification of a mod

[dmerz]

I was given this by a friend, would like to know what it is. I am having a problem with it firing, it does power on. Would like to research for known issues but need a name, any help would be appreciated

 

[dmerz]

( not sure the other one worked)

 

[Cjax]

Lava tube. Many companies made them.

 

[dmerz]

I adjusted the firing pin? With a paper clip, all is good