I have 2 x Kicks Smoke chokes for a 12 gauge Beretta in their new Optima HP fitment. I have just imported these from the States 2 weeks ago.
They have fired 2 shots each before I sold my 692 sporter and I can promise that this is true. These Chokes look amazing and you can't get them in the UK. Google Kicks Smoke chokes to see what they look like or I can email pictures. They extend nearly 2" past the muzzle and are ported. These are both half choke and still in the original packaging.
They cost me around £150 all in so they are a bargain at £100 + £5 for postage.