I've got TLR-7A's on P365XL's with TD rails and aside from my minimalist holster (Raven Vanguard) setup it really doesn't carry any larger with the light than in a holster without it. It adds no additional length and almost no added girth/bulk. The sub should be a little lower profile. On a P365 yes it's going to stick out.I'm a fan of Streamlight products. However, I'm not a fan of buying a tiny sub compact handgun, then putting stuff on it that makes it bigger.