Direct blowback?! Are they insane? This has been tried many, many times. Any time anyone tries to make a direct blowback pistol for anything larger than 9x18 Mak, it results in frame or slide cracking. Springs simply aren't strong enough to handle it, especially with such a short slide stroke, without it being so stiff that your average person wouldn't be able to rack it. Boberg can engineer all they want, but they cannot change the laws of physics. There is a century of precedent saying this won't work. Without a locking breech, full-power handguns will mechanically fail.