This is a rare weapon. It's not an easy weapon mod to find, but it's by far the best one I've encountered and used for Fallout 4.
So far in two of my previous mod videos I displayed 2 weapons from the Call of Duty video game franchise. But there is a third weapon from the franchise. And this weapon is from Black Ops 3. This is the L-CAR 9 Auto Pistol for Fallout 4. There is only a MediaFire link I could find leading to downloading this fantastic weapon mod. The link is listed below.
I give credit to a video leading me to the MediaFire link. This weapon is hard to find. But Captainoob deserves credit for his video and the link to the weapon mod. His video you can watch at the link below.
Note: If you're having trouble finding the mod in the game world of Fallout 4,
there is also another video I'm going to credit. Falloutboy 111 deserves credit for this one. His video is listed below. Watch his video if you want to find the location of the weapon in Fallout 4.