Threaded Barrel Luger DWM 1911 - Need Help

[dancessportinggoods]

Hello all,

We recently purchased a pair of Lugers from a customer of ours and one is a standard Luger that we have pinned down and sold already, but the other one is a bit odd to us. It is a DWM 1911 in relatively good shape with what we believe to be aftermarket grips, but we aren't 100% sure on that. The thing that really bugs us though, is the barrel is threaded on the inside. We can't find any information on a threaded barrel Luger. I'll try to post some pics below. Any information you have is appreciated. The serial on this piece is 8598.