View Full Version : ACS Break In

09-07-2007, 11:27 PM
Here is a simple guide to break in your ACS bolt so you stop chopping paint.

I will be using my wife's brand new Pilot ACS to do this. I know of 3 ways to do this & all are shown below. There are a few other ways to do this but these were the first I could think of.


1. You will have to disassemble your marker to get to your bolt. If you are unsure on how to disassemble it, follow Otter's disassembly & assembly guide. (http://www.ottersccustoms.com/assemble.html)

2. Set the marker & internals off to the side out of the way.

3a. Take the bolt in your hand & place your thumb over the front of the bolt. Now wrap your index finger around the bolt pin & pull. Release & repeat. This maybe very boring but will work your finger(s) out.

If that is uncomfertable use your middle finger to pull the pin & wrap the index around the bolt.

3b. Now if you don't want to take the time to compress the bolt time after time you can take a rubber band, I used a hair tie rubber band thingy, put over the bolt pin & pull it to the front of the bolt.

The rubber band may not have enough force or be to long to use so just double it up. Let it set for a while.

3c. If you just happen not to have a rubber band you can use a dresser. Open it up. I put a wash cloth over the back side of the front of the dresser so the bolt tip isn't hurt.

Now close it & walk away.

Once you have broke the bolt in you won't have to worry about chopping. This is what will happen when the ball is half way in the chamber when the marker is fired.

Hope this helps out the new folks with this bolt!!

Remember, happy balls are not busted balls!!

Mods, if yall don't see this guide fit for KUSA feel free to delete it.

09-08-2007, 11:23 AM
Nice guide. Nice pictures.

09-08-2007, 11:35 AM
Thanks, just something I threw together this morning when I was bored out of my mind.

09-08-2007, 12:17 PM
Nice guide, deserves a sticky. Another way is to stick a wood dowel, screwdriver handle, etc. in the feedneck and uncock the gun this will also help break in/weaken the main spring which is usually too strong on a new spyder.

Oscum Guy
09-08-2007, 04:19 PM

09-08-2007, 05:06 PM
i barely broke mine in (compressed it maybe 50 times) and i didnt have problems when i went and played with it. is the bolt supposed to recock itself when it stops a chop? becuase mine doesnt.

09-08-2007, 05:14 PM
The marker will recock itself when a ball is mid chamber. If it doesnt its not fully broke in.

09-08-2007, 07:12 PM
maybe you should compress yours a little more. nice job on the guide!

09-09-2007, 01:16 AM
yep, if it's properly broken in it'll always recock, no matter what. my friends, we stuck a squeegee in it, and fired it full auto and everything, recocked every time. Fired good too, till a worn valvepin started causing weird firing issues.

09-09-2007, 07:03 AM
Nice! i like the last pic. lol you can also break in your bolt by firing your gun with a sqeege in the breech like Nenkitsun did. but i like the third idea you had. nice work!

09-09-2007, 03:50 PM
till a worn valvepin started causing weird firing issues.
Happened to me, what happens is the valve spring wears out and bends causing drag and it gets worse and worse until it wont fire at all. Replacing the valve spring and polishing the pin will fix it.

10-01-2007, 12:00 PM
How many hours/days we must do it to break in the bolt ?

10-01-2007, 01:55 PM
until it is soft and pliable, if it takes no effort to mash it down you are good.