@ SSHarber..I have the TLR2-s on my G23 Gen 4..for home defense..I have zero issues with firing with the attachment. The added weight has no affect on how the pistol performs. If anything, it helps with the added weight up and under the rail. One thing you may have to deal with is the powder residue after shooting with it. It will collect on the lens of the light. Just wipe it off. My main reason for buying it was for the strobe function, and not the laser. BUT. The laser is a good deterrent . You shouldn't have any probs with the tactical light installed. I never have. 700 rounds and counting. Hope this info helps ya out.