My 30+ yo old Mossy isn't tapped, so I use an old Weaver mount. Put a camo'd TRS-25 on her and love it! Many, many boxes of turkey loads through it without a problem. And great battery life. Also use TRS-25's on my old No4Mk1 303 Brit and K31 7.5x55 Deer rifles. Having successfully hunted with them in all weather conditions, rain, snow, freezing temps, I am more than impressed. A great value product in my experience.
Be well