You are bidding on a Bowers silencer. Bowers cans are great cans and they have many different one available. This one is the CAC-9. Meaning it is a 9mm can. Comes with a 1/2x28 thread adapter. According to the ATF paper work Bowers is the maker for this Silencer. It is our goal that you are 100 percent satisfied with our products and transaction. The buyer will have a 3 day money back inspection period after these items are received to your FFL. This will transfer direct to your Class III dealer tax free from our inventory on a form 3 efile. Comes with a SN S725