If you're looking for the absolute best GBBR package money can buy, this is it. This rifle shoots FAR! And it's very consistent and accurate with its upgrades. It's a wonderful showpiece and collectors item plus it's one of the best preforming guns our there. Not only is this collection extensive and all in one place, it has a lot of essential and rare discontinued parts from FG Airsoft that make this set up outstanding. There's a lot to go over, here's the short of it: it can run on propane or HPA (these aren't your everyday HPA taps, they hold air in the mag, even after it is disconnected), it is very air efficient getting 1.55J at 50psi with the short barrel, everything is in near perfect condition, and you won't find anything like this again! Two barrels and HPA means you can change your power output and BB weight to change from Rifle to DMR to LMG (AUG HBAR with the Bipod) in just seconds. It's basically three guns in one. Now let's get into the breakdown. Here's what's included: •GHK AUG A2 ($440) •Custom HPA Tapped G&G Drum ($150) ••14" and 20" complete barrel sets each with upgraded TNT APS-X hop/barrel systems. (Original brass inner barrels and hop-ups included) ($320) •GHK Tactical Handguard Scope Top Rail Kit (installed original scope/handle included) ($55) •GHK AUG A3 Rail System and Sling Mount ($85) Recoil guide rod springs upgraded with additional half spring in each rod to increase blowback return which is a bit sluggish stock ($20) •Spare FG-Airsoft Adjustable Nozzle (NPAS) (Stock high power nozzle installed) $50 •3x 36rnd gas magazines with FG-Airsoft HPA taps installed and FG-Airsoft mag base plates with pre-cut hole for the tap (these taps are $25a pop and come with a check valve allowing you to use either HPA or fill them with green gas) ($240) •HBAR Bipod ($20) •8 x stock mag base plates with no HPA tap holes •8 x stock nuts to replace the HPA taps if you want to revert back to gas only •1x spare FG-Airsoft HPA tap ($25) •1x Main line with Foster male QD on one end and FG QD connector to fit the tap ($30) •2 x spare magazine output valves and spare o-rings ($30) •spare magazine gas inlet valve ($15) •1x spare set magazine feed lips ($10) •Spare recoil guide rods with one extra spring. ($75) Retail this package is around $2,000 and doesn't include finding all of the rare and discontinued parts that make this set up one of a kind and incredible. No trades on this one, unless it's an American PTW, or something extremely rare. I might consider parting some of the parts if you send me an offer. In addition, I can make more of these HPA Drums for $150 each if you're interested. Price is shipped and includes fees!