THis is marked 3" mag. 28" tubes marked mod. and full a dime will not go through the mod. barrel, single trigger, dosn't have an auto safty but does have a recoil pad. around 95% wood and metal, I shoot mostly 7/8 reloads of 8's no mal functions yet. I can't find much info on the net shoot mostly 16 yds. and universal trench just seems toget the job done. The blue looks like black chrome.