Some p90s creak or feel flimsy, but this frame is reinforced polymer. It feels rock solid and much more realistic as a result (after modification, feels sturdier than Krytac P90). Features: -Piston assembly, cylinder, gears are V2 compatible (standard) -Extremely strong machined aluminum upper receiver -Crisp selector switch -Lightened trigger spring for better pull -Low profile pic rail -threaded barrel Upgraded with: -Quick Change Spring (go from field to CQB fps in seconds) -Deans/T plug wired, but Tamiya adapter available on request -Reinforced radiused V6 gearbox (similar front profile to V3 gb, which is far stronger than V2 gb) -semi-auto could use an M-trigger -high torque motor