Latest video of RA Tech features the WE ACE VD Gas Blowback Sniper Rifle. It's a more intensive one this time as they go through the nuts and bolts... "RA Tech tests the WE Ace VD GBB sniper rifle, including bolt weight, air tight, fps,recoil, and CTC accuracy. It's a good product, the only problem is it needs enough space, because it's a very long rifle."