The PDW is the smallest version of the MP5 series of submachineguns. PDW=Personal Defense Weapon. There are variations in size, calibers, integral silencers etc. Use the link at the top of the page for firearm photos then link to HK photos.
This series of subguns is the most popular in the Westerrn world.
Just tried the link I was going to send you to but it appears to have disappeared.
Does anyone know what happened to HK Pro? When I bring up the suave.com addy I receive a 404 error.