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Systema Non-Linear Irregular Pitch Airsoft AEG Upgrade Spring (Power: M120)
23 Customer Reviews
by Mathew D. on 12/30/2008
"***-Experienced users only.*** Definitely but awesome spring for upgraded guns.
by David H. on 11/24/2008
"ya it may look slow but you need to crono it before you dis it its systema you probly didnt install it right it dos do 450-500 475 is the middel ground that most people get
by Matt B. on 05/29/2008
"With this spring, a Tight bore barrel and the gasket mod I have seen this spring shooting 380 with .20's in my M16. Before these mods it was only putting out 315, couple that with a 9.6v battery and a high speed motor and you can expect 22 rounds a second
by Thomas S. on 09/03/2023
"Review for Systema Non-Linear Irregular Pitch Airsoft AEG Upgrade Spring (Power: M130) & M120 & M110
While the spring are high quality, they are way way over powered. An M130 generally means 130 meters/second with a 0.20g bb (guarder SP are tested with a 0.25g bb). 130 meters / second with a 0.20 is roughly 1.7 joule. However, the M130 I tested was getting up to 1.9/2.0 joule on quite a few guns I was testing, so it wasn't the guns but the spring. The same could be said for the M120 and the M110 I tested.
Knowing this, if you need an M120 I would recommend buying an M110. If you need an M130, I would recommend buying an M120. I took off a star because even after months of use, the spring still had the same amount of power. If you end up in the situation where you are 0.1 joule over your field limit, and have a rotary tool, just short stroke your sector gear by a tooth and you will be within your power limit.
While the spring are high quality, they are way way over powered. An M130 generally means 130 meters/second with a 0.20g bb (guarder SP are tested with a 0.25g bb). 130 meters / second with a 0.20 is roughly 1.7 joule. However, the M130 I tested was getting up to 1.9/2.0 joule on quite a few guns I was testing, so it wasn't the guns but the spring. The same could be said for the M120 and the M110 I tested.
Knowing this, if you need an M120 I would recommend buying an M110. If you need an M130, I would recommend buying an M120. I took off a star because even after months of use, the spring still had the same amount of power. If you end up in the situation where you are 0.1 joule over your field limit, and have a rotary tool, just short stroke your sector gear by a tooth and you will be within your power limit.
by Vlasto S. on 08/07/2020
"Got this for my G&G TR16 MBR 556. I chronod my gun before the spring and it was shooting 305fps average.Then with the systema M150 I am getting a consistent 398 to 400fps. Did not get anywhere near 500 to 550. Which is what I'm looking for.
I ran it with a 11.1V lipo and my motor was pulling it without a sweat and was getting 16 RPM
Pros,
Gave me 100fps more
Cons,
Not as stiff as I was expecting
I ran it with a 11.1V lipo and my motor was pulling it without a sweat and was getting 16 RPM
Pros,
Gave me 100fps more
Cons,
Not as stiff as I was expecting
by Julio L. on 05/27/2015
"I got this and install it on my biodynamic m4 .. awesome !! Shoots 493-503 .. real good..
After three games it shoots 470-480. . I hope it stays there..
After three games it shoots 470-480. . I hope it stays there..
by jesse a. on 09/29/2008
"its alright probably not 450- 500 fps because it looks alot slower when you fire it maybe 390 fps over all pretty good if you got the matrix m14 you need this
by Joseph W. on 02/14/2020
"Put this in my AM-013 with a 575mm barrel, only getting a consistent 430fps with this. Could be the extra long barrel?