View Full Version : acs bolt

01-05-2007, 05:19 PM
while breaking in my bolt i have noticed that in the diagram it shows the bolt having 2 o rings on it but my bolt does not what is up with that why dont i have o rings on it and does it need them there really is no place for them

01-05-2007, 07:05 PM
there are no orings on an acs bolt. that is one of hte few reasons to change it. bolts with orings seal better and keeps blow back from happening

01-05-2007, 07:11 PM
do u have any suggestions

Hob Hayward
01-05-2007, 08:44 PM
Its not supposed to have o-rings, the design doesn't work with o-rings. Why? The o-rings create drag if they seal well, the drag causes the acs bolt to compress as it moves forwards just enough so that it doesn't cup the ball, you'll get major blowby issues and possible unexplainable chops caused by turbulence.

01-06-2007, 04:14 AM
Bandit Bolts Paintball sells delrin bolts with o-rings for low pressure and high pressure set-ups, that don't swell with oil. There are no ACS bolts with o-rings available from any manufacturer. Alamo also has o-ring bolts made from delrin. Check out my review of the Bandit:


Alamo bolts:


01-06-2007, 08:11 AM
There are 2 types of ACS.....plastic and metal. Maybe the one you saw w/the o-ring was made of metal -

01-06-2007, 09:43 AM
The drawing that Kingman sends out with the 05 Pilot ACS is of the Pilot. It does not have an ACS bolt. If you look closely at the drawing you will notice a few other differences; bolt, trigger frame, barrel and drop forward are all different.

01-06-2007, 12:22 PM
if there isnt a place for the o rings then dont worry about it millions of people have the pilot acs like me and fine;)