First of all:
http://www.airsoftsniperforum.com/43-longrange-aegs/892-holy-grail-building-your-dmr-aeg.html
So if you're going to be going for SDM then you want to be able to reach out pretty far right? If you're running a M4 with a standard box you might want to get a bore up set. I imagine you have a v2 gearbox in there right? SHS Bore-Up One-Piece V2 Cylinder Set - $40.00 : BRILL ARMORY, Quality Airsoft parts for the discerning consumer. Something like that would be good. Most DMRs are made using guns with extended gearboxes: SR25, SVD, M14, etc. Your v2 is only standard, but with a bit more cylinder volume you can get a better cushion of air for your BB to ride. Also along with that you should r-hop a well-made barrel like a prommy
http://www.airsoftsniperforum.com/43-longrange-aegs/892-holy-grail-building-your-dmr-aeg.html
So if you're going to be going for SDM then you want to be able to reach out pretty far right? If you're running a M4 with a standard box you might want to get a bore up set. I imagine you have a v2 gearbox in there right? SHS Bore-Up One-Piece V2 Cylinder Set - $40.00 : BRILL ARMORY, Quality Airsoft parts for the discerning consumer. Something like that would be good. Most DMRs are made using guns with extended gearboxes: SR25, SVD, M14, etc. Your v2 is only standard, but with a bit more cylinder volume you can get a better cushion of air for your BB to ride. Also along with that you should r-hop a well-made barrel like a prommy