Just because it's almost directly on point, I've got a TRS 25-4 (without the gold logo, even!) that I bought because it seemed really cool, I use it the way you're thinking of using it, and I have had no issues with the ILS. It's a range gun, and it's a steel N frame chambered for a non magnum cartridge, and it turned out to be really cool. If you like the TRS 21-4, you should get it.