Benelli style shoulder stock for Nerf blasters.
Needs a 16mm tube to connect the 2 pieces. Cut it to your desired length so that the stock fits comfortably and glue it in place with epoxy glue. I recommend a tube length between 18 and 25cm.
I included a tighter version of the stock mount since I had to use a couple of pieces of tape to get it to fit snugly.