Madbull M120 AEG Spring[M03A11][02458 / MB SP120]
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Upgrade your AEG's fps to 380 to 410fps. It is highly recommended to upgrade plastic bushings and spring guide to metal bushings and spring guide with this product. Also, it would be wise to upgrade plastic pistons to polycarbonate piston; plastic piston heads to duracon piston heads; and standard gears to reinforced steel gears. Finally for best results a battery upgrade is also recommended.
- Manufacturer: Madbull Airsoft
- Color: Green
- Material: Metal
- Package Includes: One (1) Spring
This madbull m120 spring is powerful, I was recieved consistent fps around 450-465 with my kwa km4 ris. I have a madbull 6.03 509 mm barrel, systema cylinder and cylinder head. bravo toughness piston and the bravo thrust piston head to aid the fps. Still even got consitently between 23-25 bps.
Hard spring and looks cool
Great spring for custom AEG's
Can be tough to install if your not strong enough to compress the spring and put it in the gearbox.
-Great spring, bought it for a VFC M4 that was shooting about 360 stock. The spring pushed the FPS to a perfect 400, was not expecting it to be so close to the mark.
-Perfect FPS increase
-Slight loss of ROF, but that's kind of expected
Good spring. Installs fairly easily in my VFC M4. Brought my FPS up from about 365 to a perfect 400. I expect it to drop about 10fps as the spring breaks in but I'm about 1000bb's in and it's staying a consistent 395-400
-Perfect speed for a field gun
-Works well in a Ver. 2 Gearbox
-A bit expensive for a twisted piece of wire
- 400fps out of the box, probably means it will drop a bit before it settles down
||Will this be good?||0 answers
if I use this spring with my M4 which shoots 370-380 fps, do I still have to upgrade the internals?
I am not very experienced at working with airsoft gun internals. I want to upgrade the spring, but i am trying to avoid messing with the internals too much
2662 days ago
(I have this same question)
It should be fine
2660 days ago