This one's dear to me as it was my first gun made for a client, Had so much fun with this design as you can see it was influenced by mostly warhammer, but also got some ideas from Spas 12, can't help it but to be obsessed with Spas 12.
I also had the inmense honor to work with Victor Doelradjak https://www.artstation.com/defroeszte as a 3D modeller, he understood perfectly the vision we wanted to achieve and translated my work flawless, even improving my desing thousandfold, please give him a follow.