Up for sale here is a DMR that began life as a D-Boys Mk12 and has evolved quite a bit since then. The original owner had put in a Systema M150 complete reinforced gearbox and managed to strip out the gears in it prior to my receiving the AEG. In light of this, I had it completely rebuilt with new Systema helical gears and a PDI 170 spring (M120 equiv). The Cylinder, Cylinder head, and piston were all also replaced, and the AoE mod was done do it. The AEG is also double modded to fire in Semi-only mode as it Chrono's over 400fps on average. Internally it has the selector plate modified, and externally it has a low profile grub screw in the body that prevents the selector from going to the auto setting. The AEG also has an A/B mosfet wired in to ease wear on the trigger contacts. It has a Madbull "Ultimate" hop up, and a PDI 509mm 6.03 Steel tightbore.
Externally it comes with a non-brand scope that looks like a generic 3-9x40 but in reality is a 1.5-9x40 which gives a great field of view for airsoft. It also has a Harris style bi pod mounted on to the RIS. I also replaced the flash hider with an offering from G&P that has the realistic suppressor mounting threads on it, and even included an SPR style suppressor that is QD. The AEG overall has a paint job that is blended for the forests of the Midwest USA.
And lastly, what's wrong with it? The AEG cycles and functions just fine, however it needs a new hop up bucking. Due to what was most like user error, it tore the bucking last time I used it, which caused every shot to jam. With a new bucking, this problem should be relieved, leaving you with one beastly DMR.
Right now, I'm not entirely set on selling this so I'm accepting offers. Shoot me a PM if you're interested or have any questions. I'll update this post with some pictures later once I dig them up and get them on to photobucket.
Pics from right after it was painted: