Check out this overview of the affordable Golden Eagle G36K, available at Zulu Tactical Armory. This replica features a foldable stock, Picatinny rails, and an adjustable hop-up chamber. Shooting at 320-340 FPS, it measures 750mm folded and 970mm unfolded, weighing 3400g.  Upgraded with improved finishes, materials, a new hop-up chamber, and spring-retaining pins, this version uses a Version 3 gearbox and comes with a Ni-Mh battery and charger (Lipo compatible with recommended MOSFET installation), a 3x scope, bipod, plunger rod, high-cap polymer magazine, test BBs, and manual.