The place in Lovettsville is called minuteman arms. You also have SharpShooters in Springfield. Blueridge in chantilly. There is one more in Purcellville i forgot the name. It is on the same street as Purcell store. It has alot of modern weapons. There was a ton of consignment there 2 weeks ago...
My buddy has both the M240 and the m249. I have shot both. But the saw has broken eveytime we have taken it out. Bolt design sucks and where he got it from has sent him 3 bolts already. Biggest disappointment ever. It also must be kept clean and hates cheap ammo. We have never gotten no more...