The open trigger guard would bug me too. When I carry my G27 I use the clipdraw with the Raven Concealment Vanguard trigger cover with the lanyard cut down and looped to my belt.

https://www.clipdraw.com/store/index.php?rn=392&action=show_detail

http://raven-concealment-systems1.mybigcommerce.com/original-vanguard-holster/