PT-111 ribbed trigger guard???

[Twitch]

I have a 3rd Gen pt-111 without an accessory rail. I noticed that the front part of the outside of the trigger guard is ribbed (or has grooves). Does anyone know the purpose of this? Is it there to facilitate a clip-on type laser since there is no rail? Thanks for any responses.

 

[JoeHatley]

It's a non-slip surface for folks who use a forward finger support.

Joe