I’m looking to get some thing different for my m14 ebr upgrades include madbull inner barrel shs high speed gears shs pistons with steel teeth shs piston head shs aluminum air nozzle lonex a-2 high speed motor and high speed bushings reshimmed no issues looking for a Barrett 50 Cal or sig 556 or dig 552 or mp5 or another built dmr open to other offers worst I can say is no. Must be located in ct thank you