I'd suggest reading the non fiction book; One Ranger.
J Jackson, a former NRA board member & retired Texas Ranger(LE version), packed a 1911a1 Commander .45acp with Stag Grips.
He goes into detail about sidearms, pistol grips, duty gear, etc.
He even acted as a set consultant for actor Nick Nolte on the action drama:
Extreme Prejudice.
www.imdb.com