Finding a new spring

I would like some assistance. I would like a new spring, and necessary upgrades for the spring to work, for my cybergun thompson m1a1. If anyone knows where i could get to the 370-380 fps range, that would be helpful. Thanks.

www.mechbox.com should have some spring upgrading charts...

ok thanks. That should help a lot.

Ok i'm looking at the prometheus m110 spring. That should do the trick. Also i will get metal bushings and a metal spring guide if my gun already don't have those. I may upgrade my battery, but for now just those upgrades. If anyone has any better ideas, i'd be glad to know about them. Also, if anyone could figure out those other upgrades to be compatible with the m1a1, that would be helpful, i am also looking.

Yea the spring guide and bushings should do the trick, but why...

The point of a SMG is to deliver low velocity rounds, in a very fast rate, within a short distance.

Instead of buying a M110 I would get the bushings and spring guide. Then i would get hi velocity motor with the proper high velocity gears, and a 9.6V...your choice.

Well, i guess i will would like to go with the spring. The rate of fire is good for me. I know the real steel version was an smg, but i would like mine to be more of a long range aeg. The smg part will be when i get my mp5k. But i just would like high velocity shots that go far. I will most likely go with a 9.6 battery as well, but that will be a later modification.

I have made my decision.

spring: http://www.airsoftgi.com/product_info.php?products_id=1427

spring guide: http://airsoftglobal.com/product_info.php?manufacturers_id=79&products_id=3066&osCsid=49e51436aa0b3531b606102312fe538f

bushings: http://www.airsoftgi.com/product_info.php?cPath=31_53&products_id=2252

For the battery i will get a 9.6 but i will need to ask m14 double-taps about what he did to his battery.
All parts should work with my version 6 gearbox. Tell me what you think.

A M110 wont put you at your goal at all. With a M110 you will be shooting 350FPS, but thats just enough FPS to put you in the 200ft range; or more. My friend G36 has greater range because of the wonderful Hop-Up. But my other friends m4 at the same FPS(350) can only get 190-200 ft max out of his gun.

The Thompson's Hop-Up is similar to the G36's so you should be good.

sticks

do you suppose the stock spring was an m110? 350-360 fps was where the gun was shooting just stock.

sticks.13 wrote:

A M110 wont put you at your goal at all. With a M110 you will be shooting 350FPS, but thats just enough FPS to put you in the 200ft range; or more. My friend G36 has greater range because of the wonderful Hop-Up. But my other friends m4 at the same FPS(350) can only get 190-200 ft max out of his gun.

The Thompson's Hop-Up is similar to the G36's so you should be good.

sticks

I think it all depends on the gun and the other upgrades... my E1 AK has a STOCK m110 spring in it and a tightbore barrel. I just chronoed it the other day at 390 and that is after it has had several thousand rounds put through it.

I guess I wouldnt totally throw out an M110.

If you want 380-400 and you don't have any other mods that will help get your fps up... then you probably want an M120. Word of warning... this will significantly slow down your rate of fire. Hope you expect this... you will probably want to consider a motor upgrade in the future to help it out.

Oh wait, you said your thompson. my bad...lol...

yea get the spring. lol

ard777 wrote:

I would like some assistance. I would like a new spring, and necessary upgrades for the spring to work, for my cybergun thompson m1a1. If anyone knows where i could get to the 370-380 fps range, that would be helpful. Thanks.

1. Version 6 metal bushing
2. m120 / sp120 / pdi 170 spring
3. metal spring guide with or without bearing... Just check which version (2 or 3) can't rmember.
4. most important the right battery that would have enough power to crank the spring.. an 8.4v sub-c sanyo can do it but using a 9.6v sub-c will give you higher ROF.

5. increase the hole size of the stock piston head by using a drill bit.. choose the small sizes in a bit set. manually rotate the bit in the holes

If you have extra cash.. replace air nozzle with air seal nozzle with 0-ring.