This is a very good spring. I put it in my stock G&G GR16 series M4. The spring shoots very true from the first shot. Not much FPS difference. This spring has put my gun pretty close to 400fps which surprised me because I was looking at getting 350fps to 380fps after installing it. My gun has good compression so that might make a difference. My stock G&G motor could not pull this spring very well. After about 100-150 shots the motor would get pretty warm, so I got a new Systema Magnum motor (awesome motor by the way). Would also recommend getting a good bearing spring guide. This spring puts a lot more stress on stock gears fyi.
No real break in period
Good price (even after 10% discount)
Can't got wrong with Guarder springs
I guess the only thing was that the FPS after installing this into my gun was higher than I thought but that was ok because the limit here is 400fps and this got me much closer than I thought, which is actually good.
2008-06-27 15:07:11 J. CADY verified buyer
For: Guarder SP110 AEG Spring
This spring was too powerful to put in a CA Sportline gearbox.
DO NOT BUY THIS SPRING IF YOU OWN A CLASSIC ARMY SPORTLINE!!!
I can't rate it bad because the spring works fine it's just my gearbox can't support it.
It worked fine in my buddies Systema drop in... but then again I guess it better...
Disclaimer: All airsoft guns are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange. No person may openly display or expose any imitation firearm (replica firearm), in a public place. The term "public place" means an area open to the public or exposed to public view and includes streets, sidewalks, bridges, alleys, plazas, parks, driveways, parking lots, automobiles, whether moving or not, and buildings open to the general public, including those that serve food or drink, or provide entertainment, and the doorways and entrances to buildings or dwellings and the grounds enclosing them. Any person who changes, alters, removes, or obliterates any coloration or markings that are required for by any applicable state or federal law or regulation, for any imitation firearm (replica firearm), or device in any way that makes the imitation firearm (replica firearm) or device look more like a firearm is guilty of violating the state or federal law. By accessing the Site, you certify that you are older than 18 years of age or the age of majority where you live, whichever is older; that you are the owner of any credit card used to purchase on items on the Site; that you are familiar with all local laws in your area affecting your legal right to access airsoft products; that any products you buy are for your own private enjoyment and that you will NEVER share these products with a minor in ANY WAY.