Gto/flx for walther ppq - ArmaLaser GTO/FLX Finger Touch Red Laser Sight for Walther Handguns

I just installed this GTO/FLX on my Walther PPQ 5 inch and it is just want I am looking for. Since the housing is plastic, I had a hard time installing the battery door and installing it on my rail, but I assume it because it was new and I needed to give it a little muscle. After that it goes on and comes off easy. Just to give a FYI, if you have a holster for you PPQ, it will not fit with any laser attached to it. You would use this laser as a stand alone (out of a holster) or find another holster that will fit the pistol with a laser sight attached. Other than that, I love it.