New here and looking for answers, I apologize if this question has already been addressed. I own an LWRC M6 A1-S upper that hasn't seen a lot of use lately. I would love to have the LWRC Six8 8" pistol barrel and piston assembly installed on my upper by the factory. I have been to the LWRC site but there's no contact info on how to contact to even ask if the conversion is possible and the cost. I assume they want you to go to one of their licensed dealers? I'm looking for a compact truck gun and the 6.8 looks promising. l would appreciate any insight or suggestions.