Don't have the G&P, but yeah Eihger is pretty much spot on. According to
Redwolf the G&P features:
- 8mm bearing complete gearbox (GP857A)
- Metal Air Nozzle (SR-25)
- M120 High Speed Motor (GP561)
- Precision Inner Barrel
Compared to the stock A&K which comes with 7mm bushings, (at least i think so, i didn't measure) a <1J spring, a fairly low torque motor, and a 14.5 in 6.08mm inner barrel, the extra $90 or so is well worth it down the road seeing as CQB barrels are selling like hotcakes and at $53 at that.
In regards to my Masada, I purchased mine from RSOV immediately after discovering ASGI's ludicrous price margin. I took advantage of the 12% discount to shave off $24~ bringing the total in (shipped!) at about $225. Came in a week or so after I had ordered complete with the orange flashhider and everything. (which comes off easily with a few blasts of CLP :D)
Now, since from what I've been told A&K has been cleared by Magpul PTS to manufacture what have been called "sportline" Masadas by guys on Arnie's, we should be seeing some more being released in 2010. This doesn't exactly apply to the G&P customs I would imagine, however.
But all that aside, Eihger, Masadas in FDE are still in stock at
UnCompany. If FDE isn't exactly your cup of tea then.. i dunno.