I have never heard of Dunhams, however i have owned a G-3 look alike rifle. If the gun they are trying to sell is a Century Arms Cetme do not buy it. I had so many problems with it i gave it away for a 300$ loss(i payed 300$ for it)If it any type Cetme do not buy it. Save your money for an AR-15. Unless that gun is priced over 800$ i doubt it is an H&K. It could also be a FA91 which