These are the ones i have..
Naroh Arms KeyMod Handstop, $36.50 shipped.
IWC KeyMod Handstop, $34.95 plus shipping.
Both have the same weight, which is 0.2oz.
The Naroh has 2 screws while the IWC only has 1. Both are well made and work great.
Naroh is longer while the IWC is much simpler and shorter designed. As you can see from the pics shown, both models will fit and look nicely plushed on 4 different KeyMod rails.
If i were have to choose one? I'd def choose the Naroh Arms. Why? I feel more comfortable with it. But i assure you won't go wrong with either one.
In the future, i might try this Lanco Tactical, $39.95 plus shipping?