I always thought having a grenade launcher mounted on my lower RIS would be dandy. I changed my mind when I saw images of a shotgun mounted to the bottom of an M4 instead. From what I believe the setup is called a masterkey, and after some thought and some research I decided to make one myself. Over all it was a very easy processes to do, the simple use of an shotgun with an rail on the top mounted to my bottom RIS rail with little bracketed clamps.
I know its nothing fancy, but to me its like a flower and as the time goes, it will grow and change. Eventually I'll put in a metal body of my fancy and remove the carry handle all together and mount a rear M4 sight only. But its all just ideas right now. But onto the images!
Seen here, is the basic set up, M4 RIS with hurricane 416, 6 position collapsable stock, and simple pump action shotgun mounted on the bottom RIS panel.
Additional images.
With carrying handle riser and Aimpoint mount. I just threw that on there to make it look all fancy. I know its not really needed.
There you have it folks. I just thought I would share it with you for fun. I got a chance to game with it this past weekend. At first its a little awkward to swing around, especially if your in an enclosed area. But eventually you get the hang of it. Unfortunetly it is a bitch to put together with out two sets of hands. Unless your very paitent, it will probly take you a couple of times to get the first braket set on unless you have help. With two people it takes about 2 minutes to set it all up and its very very sturdy. No issues pumping and firing at all.
I like it, its a little bit heavy but with a good sling, its not to bad to navigate.
Anyways I just thought I would share this all with you for fun. Enjoy.