I hate to say this but the Mtac, Ctac holsters are junk in my book. I own one and inspite of using it for months, just could not get comfy with the plastic sticking into me all over the place. I picked up a Crossbread Supertuck for my 40fs and have never looked back. It's an amazing holster with the wide leather backstrap to spread out the weight and give a nice feel against my skin should my t pull up. I just ordered 3 more Crossbread holsters.
2 for my 1911's and 1 for my J frame pistols..
Happy Holidays