Basically. Other Hammer Extensions work much better on the model 94 if you have a scope on it.
They are simply machined to inexact tolerances and are ill fitted. Since the Model 94 has a "Drill thru" hole on their hammers...this is the proper spot for mounting one of these, one that GOES THRU THE HOLE for safety and tightness. These Hammer Extensions have a allen nut on the extension side only that you tighten down against the hammer.
Very poor design and actually not all that safe. Find a "drill thru tye that fits right thru the Hammer hole...and you will be much happier and safer!
Pros: It should be a safetey and comfort issue with a lever action Model 94.
Cons: They don't fit the hammers all that well, and if you have a scope, you must be VERY VERY careful on the use of these. I had to remove mine because it brushes the scope and it is easy to slip off your thumb because of the poor fit.
This review was written in the old system and had content requirements that are different than reviews written today.