Here's a few pics of the Night Fision sights on one of my VP9's.
Short, fat but fairly friendly to shirts and skin AIWB (much better than HD's in that regard).
I really like the colored insert instead of paint, I think it'll be more durable long term (i've had Ameriglo front sight paint lose flakes several times).
Are you going to get HD XR precision out of them? No.
Will your T-shirts look like you have a rat infestation? No.
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