Before I retired, we carried S&W 4006's, and had redguns for training. I carried a Safariland leven 2 holster, and the redgun would not fit into it unless I really backed off the little screw. Then I had to re-adjust it for my "real" pistol. I did not like that. I would prefer one of the bright yellow fake barrels that you replace your real barrel with. Same weapon, same weight, same holster fit, easily seen to be a safe weapon...