I have a 32 inch .40 cal. drop in rice barrel on an Investarms stock. I have tang mounted peep sights. The hook breech fits the tang snugly. The stock could fit better. I shoot 50 yard bench matches with it. It will shoot as many 10's as 9's. For cleaning I remove the barrel. I am thinking that bedding the barrel to the stock will make the barrel fit the stock the same after cleaning. Anyone with rifles with tang mounted sights let me know what you think.