Need help with my gearbox.

[Chad15]

So I have a quick question guys, I just took apart my gearbox to replace with a more powerful spring, and I swear this spring will not go in without the anti-reverse latch moving around, or the trigger, its either one of the 2 things that mess up, and when i do manage to put the spring in all the way there is what feels like way to much pressure, its only a 350-380 fps spring. (M4 gearbox btw)

[Yawger20]

are you using a punch or screw driver to push the spring into the box? This will help with the pressure. The trigger spring and AR latch can be a bit difficult to manage at times, but it's more tedious than anything.

[Chad15]

Yeah its mainly the Ar latch and the trigger, its just really annoying. I just not managed to get it in and close the gearbox and a few seconds later i look down.... and theres a bushing... well back to taking it apart.

[tweek17]

http://www.youtube.com/watch?v=6DvVg5y60LM @ 5:30 (watch out music is loud)

Just keep lots of pressure down on that cylinder and spring guide, if it doesnt go in use a micro flathead to move it around until it does

To save yourself from this trouble, buy an ICS with an upper and lower half...its amazing how much easier it is.

[Seabass_9000]

I will second the split gearbox idea... it is rather easy to work on either half. I have loved every ICS M4 I have ever come across because of that.

[Chad15]

Also, once I did manage to put it together all the way, that spring that i put in wobbles back and forth if push on it a little, is that normal?

[jonahm740]

Yeah, the spring should sit in the gear box with a slight bend from my experiences. If it gives a bit when you push it that should be fine as long as it is not wobbling around untouched.

[Chad15]

Alright thanks alot.

[dubbs]

Originally Posted by tweek17

http://www.youtube.com/watch?v=6DvVg5y60LM @ 5:30 (watch out music is loud)

Just keep lots of pressure down on that cylinder and spring guide, if it doesnt go in use a micro flathead to move it around until it does

To save yourself from this trouble, buy an ICS with an upper and lower half...its amazing how much easier it is.

So THATS what the two piece gearboxes are for! Makes a lot of sense.
I HATE it when the AR comes unlatched, that adds a good extra hour of failures until I get it in. Its worse because I have an aug with a two stage trigger that pops out alot too. Does anyone know if they make any v3 two pieces?

[Spectre]

Remember the ICS split gearbox only works in ICS M16 type rifles. I actually learned on an ICS M4, great guns.

Welcome to the world of tech-ing your own guns. All those little pieces makes for an annoyingly complex reassembly. But once you've done it enough times you get a feel for what the easiest way to re-assemble everything. A suggestion from me, use the mounting screw that you use to install your buffertube to the back of the gun as the instrument for installing your spring and spring guide. It has the benefits of using a screwdriver or such for installation but will not fly across the room if you loose your grip or tear apart the threading in the spring guide...

The spring should have a little play from side to side. The spring guide should be mostly stationary.

[colossus]

Like Paul said, use something to keep the spring from popping out of the back. I use a small hex key or a small screw driver to keep it from flying across the room. Use what works for you, as well when you put the gearbox back together you have to remember that there are numerous parts that have to go together just right(Like the gear shafts, anti- reversal, trigger) this may be causing your problem putting it back together. Again use something (dental pick, small screw driver, hex key) to make them stay in place for as long as you need to get the gearbox shell into place.