Upgrading a Marui MP5 SD6
 

I'm planning on Upgrading my Marui MP5 SD6

Can you guys please comment on the bellow listed items?

thanks :)

Systema Complete Mecha-Box (GBMP-12-X) For MP5-A4 / A5 / SD5 / SD6
Includes:
- M120 Spring
- Reinforced Gearbox with 7mm Bearing
- Teflon Cylinder Set
- Torque Up Spur Gear Set
- Low Resistance Switch Assembly
- Selector Plate / Tappet Plate / etc.

Systema Long Type Magnum Motor
- High-Torque Motor
- Utilizing Neodymium Magnet for higher torque and speed
- CNC Machined End Bell
- Case and End Bell with Ball Bearing installed
- Hand-Wound Rotor
- Newly designed Brushes

Intellect-1400mAh-9.6V Battery
- Mini Type
- Ni-MH Battery
- Modification and Fusedbox Removal Required For Some AEG

Overkill?

Go for a lower spring like a M100, metal bushings, maybe a spring guide. That's all you need, and is FAR cheaper.

I think he should upgrade his piston to if hes gonna get the magnum cause i think his stock will get ripped into pieces from the upgraded ROF

but piston/metalbushins/spring guide/M100 should be fine for most occasions :)

He should STAY AWAY from the magnum as you can get. You would need a bigger battery anyway. If you think you are going to go through pistons use stock or you will replace your mechbox. Stick with your M100 or M110 an EG1000 will give you plenty of firepower and even then your are jeopardizing your gun. Keep the mechbox simple! If you are trying to get a little boost on ROF try wiring some LARGE capacitors between your battery and motor. this will buffer your power supply and give your motor a more consistent power and raise your ROF. Check out the article at http://www.airsoftmechanics.com/articles.php?aid=11

And keep in mind that reinforced V2 mechboxes are like standard mechboxes, except that it takes a 3000-5000 rounds longer to break (yes, they DO in fact break the same as stock ones) with a heavy spring, even one that puts out 350fps.

86 your entire setup...

systema 7mm gear box, Bearing spring guide, m100-m120 spring depending on desired power output, high speed or standard ratio gears, silent aero head set, nozzle, tappet plate, shims, 6.03 tight bore, and last put not least 11.1v 1800mah battery!