Hey guys, I am picking up my stevens 320 this week and I have the field buttstock on it. I don't think I'll hate this, but I like having options. Are there any after market pistol grip buttstocks anywhere that fit without modification or with minimal modification? I do not have the tools for heavy mods to be done properly. I heard the 870 ATI Buttstock works with modification but I wouldn't know how to go about doing this. Any help at all would be great!