Had a bunch of PM inquiring about a comment I made about the 930 Mossberg..I said that I had a choke installed on the barrel, a barrel to shot tube support and a shell holder That I installed to the reciever...The choke work was done by a great Master and said he would never do another,,due to how hard Mossberg barrel metal was..The support I believe I picked up from brownells..Love it full choke shoots both 00 and slugs...Just heavy..DD