New gearbox image - Airsoft Fans!

This is my new gearbox (top) on my M4 I am upgrading from a G&G Gr 16 version 2 blow-back to an Aimtop 8mm Super Reinforced Torque-up gearbox. The gearbox can handle up to M170 springs but I have a M130 spring cause that is my course limit (~410 fps). I haven't used it in combat yet but from simply shooting a can I have noticed a huge power increase. There were some complications switching from a Blowback to a normal gearbox and my charging handle doesn't work anymore but it was worth it for the increase in range.