I couldn't tell you with any certainty how many rounds are down the tube. 500? More than likely less. I'm helping my dad sell this however I have a good amount of knowledge of the rifle. I would guess trigger is approximately 2 lbs. It has a 20 MOA rail but I do not know manufacturer. Rifle as is weighs approximately 10 lbs. Stock is a Boyd's thumb hole but original stock is available if desired. Barrel twist is 1:12 and is 26". Apparently he wants a pistol carbine now so he's gotta get rid of something. Asking $400 because we all love to dicker and negotiate