View Full Version : ACP terminus bolt

06-15-2010, 08:02 AM
i have an ACP terminus bolt and its made of a plastic material with two
o-rings. a guy that works at the paintball field i go to said im not supposed to oil the 0-rings because its a plastic bolt and not metal. is this true because ive been oiling it since i got the bolt.

06-15-2010, 10:15 AM
It is probably made of a low friction material called Delrin. Delrin is not supposed to be oiled because it can swell. If you notice that the o-rings are becoming dry, take them off, oil them separately, and put them back on. This will ensure minimal contact between the oil and the Delrin.

slim and shady
06-15-2010, 11:22 AM
exactly what he said. you can get a small amount on the bolt just dont cover it. When you put a few drops of oil in the ASA and shoot it a few times it should be plenty to oil your system.

Hob Hayward
06-15-2010, 08:19 PM
Meh, I've never observed delrin expanding with oil. That's just me though.

Not saying I would go to town oiling the bolt, it's a low friction material already and heavy oiling would likely increase friction. Just oil the o-rings or put a few drops of oil in the ASA as slim and smurf said.

06-15-2010, 08:44 PM
thanks for the replies guys. is using alcohol best to remove excess oil from a delrin bolt?

Hob Hayward
06-16-2010, 02:47 PM
eh I wouldn't risk it.. don't want to damage the delrin (probs wouldn't but just in case). Wipe it down with a paper towel and it should be fine.

slim and shady
06-16-2010, 05:09 PM
or run it under water and let it dry good.

06-25-2010, 08:35 AM
How does that bolt work Zombie? Better than the stock?

06-25-2010, 09:51 AM
How does that bolt work Zombie? Better than the stock?

Its an Anti-Chop bolt. When a ball isnt completely loading into the breech but the marker is fired, the bolt tip will stop but the back half of the bolt & striker will (should) finish cycling.

Boston Paintball Products made the first one for cockers. Jam Bolt used that design for years. I had a Jam bolt for my TL+ for a long time. Back in 2002/2003 a small time machinist made an ACB for Spyders. He went by BR Machine Co. Shortly after he came out with his & before I found out about it, I had the idea for one. The funny thing is that the Terminus bolt looks a whole lot like my last drawing. I would really love to get ahold of one just to compare it to mine.

06-25-2010, 11:49 AM
Shocker lube, or whatever they call it now, slick honey - those kinds of lubes are what I used on my delrin bolts - just on the orings, not on the bolt itself. Never saw any swelling on any of my bolts, except the tigershark which didnt have orings and never got oiled. Not sure why that happened.

06-27-2010, 01:53 PM
How does that bolt work Zombie? Better than the stock?

i got my pocket chronograph in the mail a couple of days ago and tested my gun today. i have a velocity thumb adjuster installed on the mr2 for easy adjustment. with the ACP bolt i was shooting around 120-140 (adjuster's lowest setting). when i cranked the adjuster all the way up, i get around 140-155 (adjuster's highest setting). i tried the stock bolt and i was shooting 140-150 (adjuster's lowest setting) and then 160-190 (adjuster's highest setting).

so i think i messed up my ACP bolt by using too much oil and cleaning it with alcohol :( . so now im just using the stock bolt from now on. i wish i knew oil and alcohol can mess up a derin bolt when i bought the ACP terminus :mad: .

06-27-2010, 08:08 PM
Technically, oil and all that is not what's wrong with bolts that tend to swell. It's the material they're made of. If it swells chances are the one that made it cheaped out and made it with a material that contains some form of nylon. I got that straight from my bud Dave who is a partnered owner of New Designz. It is easy to tell the differences in bolts made by New Designz and others made with the cheap nylon material. The nylon material is soft. So soft you can prolly dig your fingernail into it. You cannot do that with the NdZ bolts. The delrin is strong and has a hard texture to it -