This is what you need to put a pistol grip and brace on a shockwave. Comes with a high quality folding buffertube attachment by hera arms. Magpul grip as well. If you have a normal Mossberg shotgun this will also work but you will not need the brace. The brace was a little long for my frame size so i trimmed the threds a little, you can still adjust the brace to any length you want. the side folding unit was 110$ the brace kit was 160$ a d the magpul grip was 20$ i will also include the stock grip the brace came with.