ATI sells them.
I got the ATI Heat Shield. Needed a little finessing around the front end but a little Dremeling along the edges and it seems to fit just fine. Taking the barrel off and putting it back on take a few seconds longer as you have to move the barrel out/in as you unscrew the Cap, but it's no...
Old timer who has more guns than sense. Picked up a Shock Wave for fun and games and as a hallway sweeper, if needed. Fired a box of birdshot and enjoyed it; no problems except reinstalling the trigger housing. Live and learn.