Shooting 40S&W in a 10mm Bar-Sto Precision Barrel Shooting 40S&W through a Glock 20 10mm Bar-Sto Precision Barrel. Share this gun video:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)