the battery that comes with it is garbage.. mine died after 2 months.

it could be more serious too, there could have been a compression jam and now your gear is out of sequence with your piston so it's jamming at the back of the gearbox.

Don't keep pulling the trigger, it might cost you a piston... the stock piston is not bad, but it will strip if you aren't careful.

Take it to someone who knows how to fix it if you're too afraid of taking it apart.

What kind of charger do you have?
It's been a while since the last "your battery isn't powerful enough" problem on here lol

I'm using the smart charger that comes with the battery ^^. It charges 500mah per hour.

Alright ! My M14 is working , my battery is dead. I tried my M14 with a friend's battery and it is working. The Airsoft store where i bought my m14 is going to give me a new battery :p
Thanks for your help guyz.

You should be using a large type battery with that gun anyway, since it can fit one.

Im using a 9.6v 1600mag small type battery , is it ok ? Also , could you send me a link where to buy a cheap large type battery.

Most airsoft stores will offer a plethora (of varying magnitudes) of batteries. Check to see if your local store has one; if not, a quick Google should help quite a bit.

As for your battery, if you feel it is enough, go for it. Small-Type batteries are simply known to last a bit less and have less power than large-type batteries (someone correct me if I'm wrong there) because of their larger capacities. mA is milliamps, h is hours, so mAh is Milliamp-hours. It's been calculated that the average AEG consumes ~1mAh per shot, but higher-strength springs like the one you likely have will consume power faster.

Someone is gonna let you play with a 475fps aeg?
And yes its a combo of crappy battery and charger and a way too heavy spring.

I'm playing with friends in a forest field. So there is no FPS limit. Is it safe for my gun if i keep my 475fps spring ?

I hope the field you're talking about is big enough. A backyard forest doesn't count. You wouldn't want a passing pedestrian or car getting hit because the field wasn't remote enough.

On topic, no, it is not good for the weapon. It requires a lot of strength to pull that spring, and unless you really know what you do and finetune the gearbox to withstand the stress, it will eventually fail. I'd recommend bringing it to 400 which is both safer for your friends and your gearbox.

I would like to keep my 475fps spring. Is the gearbox already enought strong to withstand the stress ? beacause it is the M14 MAX series.
It says :
The G&G M14 MAX Series features:
Full Metal Upper and Lower Receiver
Torque-Up Reinforced Gears
G&G High Torque Motor
Metal Ball Bearing Spring Guide
Reinforced Piston
High Compression Metal Piston Head
Reinforced Metal Cylinder Head
Low Resistance Silver Wiring
Tight Bore Barrel (6.04mm)

And if it is not strong enought , what i should upgrade ?

The piston will be the failure point.

i noticed mine had a hard time turning with the spring after i changed it my battery was fine idk....didnt feel like shooting someone with a rifle that was shooting 409......with .28's lol

The only thing "MAX" means is that's a marketing term that some Canadian distributor came up with after they crammed 470fps springs into G&G guns. It's no different than other G&G's.

Also, I am getting in some high quality large type batteries, cost is around $60-$70 depending on capacity, and they're worth it.

Give your rifle to your friend. Tell said friend to shoot you from 5-10 feet, in you arm, back, leg, stomach, knee, groin, etc...then a burst of full auto from knees up to shoulders.

I don't recommend head shots but I can't stop your friend from fully testing your rifle out on YOU!

If you come out without crying for mommy, and only the odd bleeder, I'd say you're good to go with 475fps.