Ive had a Baikal coach gun since 1975! Mine has outside hammers and a cross bolt(kerstin) extra lock . It has been there and done that, it has imp cyl and modified 20 inch barrels and they both hit EXactly over each other. This howitzer throws SG buck shot in 18 inchs or less at 30 yrds from mod barrell. It is the ultimate "luparra". It is as tight as new after 1500(!) full power shells, the triggers are alittle light and the hammers pull back a little heavy.