New Spring

spiritseeker · February 25th, 2009, 01:02

Hey, I'm thinking of buying a G&G M4 Carbine (http://buyairsoft.ca/catalog/product...roducts_id=438) this spring, and am wondering about swapping out the spring. I have a Prometheus Non-Liner SPR MS 135 sp (that's what the package says). Would the mechbox be able to withstand the new spring? Would I have to buy any new parts? Is it an easy swap mechbox, or one where I have to open the whole thing to get at the spring? What kind of increase in FPS would I be expecting? Is it worth it to swap the spring?

Sorry for all the questions, I'd like to know about everything to expect.

If I missed anything, let me know.

Shirley · February 25th, 2009, 01:06

You would get about 380 FPS - 390 FPS.
You would need to buy a large battery, and torque up kit.
Also, sorbo mask for the gearbox.

spiritseeker · February 25th, 2009, 08:23

Dang, that's too much work for me. Thanks for the response though.

Shirley · February 25th, 2009, 11:04

Leaving it up to 400 fps is outdoor. 350fps is max for indoors, talk to the hosts in yor local field.
If it's too much work, ask a local gun doctor.. It's not that hard to install a gearbox together.

I'm not even sure if G&G can handle the power, even though it says reinforced.

Azathoth · February 25th, 2009, 13:02

If this is a new G&G gun, that you are buying I would suggest you tear the mechbox apart, clean all the components, reshim the box and relube.

spiritseeker · February 25th, 2009, 21:45

Thanks guys for the input. I'll definitely look into both of those things. I've only ever opened up old plastic gearboxes, and at this point I don't trust myself to be tinkering around with a brand new metal one. If I do decide to upgrade the spring I'll buy whatever is needed and take it to a shop to get it done.

Thanks again!

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February 25th, 2009, 01:02	#1
spiritseeker Trader rating Join Date: Dec 2007 Location: Winnipeg, MB	New Spring Hey, I'm thinking of buying a G&G M4 Carbine (http://buyairsoft.ca/catalog/product...roducts_id=438) this spring, and am wondering about swapping out the spring. I have a Prometheus Non-Liner SPR MS 135 sp (that's what the package says). Would the mechbox be able to withstand the new spring? Would I have to buy any new parts? Is it an easy swap mechbox, or one where I have to open the whole thing to get at the spring? What kind of increase in FPS would I be expecting? Is it worth it to swap the spring? Sorry for all the questions, I'd like to know about everything to expect. If I missed anything, let me know.

February 25th, 2009, 01:06	#2
Shirley A-56 aka Mr.Hitman Trader rating Join Date: Nov 2007 Location: Toronto, ON	You would get about 380 FPS - 390 FPS. You would need to buy a large battery, and torque up kit. Also, sorbo mask for the gearbox. __________________ CANADIAN AIRSOFT PRACTICAL SHOOTING (CAPS) CAPS DIRECTOR # 0047

February 25th, 2009, 11:04	#4
Shirley A-56 aka Mr.Hitman Trader rating Join Date: Nov 2007 Location: Toronto, ON	Leaving it up to 400 fps is outdoor. 350fps is max for indoors, talk to the hosts in yor local field. If it's too much work, ask a local gun doctor.. It's not that hard to install a gearbox together. I'm not even sure if G&G can handle the power, even though it says reinforced. __________________ CANADIAN AIRSOFT PRACTICAL SHOOTING (CAPS) CAPS DIRECTOR # 0047

February 25th, 2009, 08:23	#3
spiritseeker Trader rating Join Date: Dec 2007 Location: Winnipeg, MB	Dang, that's too much work for me. Thanks for the response though.

February 25th, 2009, 21:45	#6
spiritseeker Trader rating Join Date: Dec 2007 Location: Winnipeg, MB	Thanks guys for the input. I'll definitely look into both of those things. I've only ever opened up old plastic gearboxes, and at this point I don't trust myself to be tinkering around with a brand new metal one. If I do decide to upgrade the spring I'll buy whatever is needed and take it to a shop to get it done. Thanks again!

New Spring

Upgrades & Modifications