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Torch · May 14th, 10:40 AM

My short review of the First version of this bolt is here:
Imagine Derlin ACS Test

This is the Derlin ACS Bolt, Imagine model. Kingman has relased a second version of these bolts.

If your bolt has "steps" on the sides of it, you can send it to Kingman Tech Services and they will send you a new Verson 2 bolt. My turnaround was less than a week, Monday to Saturday.

Anyway, on to the notes.

Here is the first version of the bolt. Note the sides of the bolt. The 'steps' indicate it is the first version.

This, on the other hand is the new version. Notice it has no stepping- The bolt is smooth all the way down its length. This isn't where the changes stop, however.

The air inlet is also different. Perhaps a longer oval-shaped passage will result in less blow-back, which plagued the first bolt badly.

Also, although not visible in the pictures, there are some minor surface cuts and changes.

- The front half of the bolt is slightly larger, probably to seal better. It is so slight a change from the rear half that it is hard to see on the bolt, but it can be felt.
- The bolt has a detent cutout on each side, as opposed to just the single side of the older bolt.
- About 1" from the nose of the bolt, there are two lines cut. It almost looks like they tried to make an O-ring effect out of the derlin itself. There's a line, then nothing, than another line. I can only guess as to the purpose of this, and I think it may be an attempt to seal against the barrel during firing.

Also, on the first Imagine bolt, when it anti-chopped and if it faield to recock, the recocking handle often burried itself inside the bolt, leading to some shaking and poking before you were able to pull on it and recock your gun. On the new bolt, the handle does not fully enter the bolt, so this shouldn't be much of a problem. The ACS spring "feels" lighter as well. I can't test this though, so your results may vary. If so, the recocking problem may just disappear altogether.

The new handle stop position-

Conclusion:
If you have the first version of the ACS Bolt, and are unhappy for any reason, I think this is worth the small cost of sending it to Kingman.

**bobide** · May 14th, 11:46 AM

hmm, looks much better, highly promising, sadly i own a halo and don't need that.

***Spyder-Junkie*** · May 15th, 11:21 AM

Well, at least I get an upgrade when i send my ACS bolt Version 1 back to kingman. The other day, I was out paintballing and my gun just stopped. It didnt shoot, because air wasn't gettign into it and the bolt would not moved. So i went home and took it apart, only to find that a back portion of the Delrin, near the very back, had chipped off and the piece that had broken was jamming the bolt from moving because it was lodged in between the bolt and the gun itself.

I am sending it back to Kingman and Hopefully they send me the New one.

DIAGRAM of what happened:

|.\/.|
|....|
|....|
|....|
|....|
|....|
|....|
|.^.|
|....|
|....|
|.U.| <---A part of the Delrin right here Chipped off.......
|.O.|
-----

The piece was shaped like a U but filled in, so almost like a semi-circle shaped pices, and I don't know what the reason could be for this breaking.

**Viking Kid** · May 15th, 07:06 PM

hey, i have that version of the bolt, i put it on my gun, i started playing one game, and during the game, the bolt wouldn't recock itself, i tried this a few times and the same results. so i go home put on the stock bolt, and it is shooting fine, what is the problem here, is the air seeping past the bolt and it's not able to recock itself? should i send it back into kingman, get a new one? or just sell it, and save for a blue bolt?

Torch · May 15th, 07:16 PM

If it's not recocking, than the hammer isn't hitting the valve hard enough to open it.
Although the blowback these bolts have can be a problem, it has no effect on the
recocking cycle. I'm going to guess that for some reason, the bolt it letting the hammer ride on the ACS spring, like it was trying to prevent a chop, and that's stopping it from recocking. I don't know what the bolt would be sticking on though.

Have a look at it, try moving the bolt forwards and back by hand and see if you notice a stick anywhere. Check the hammer as well. If it works with the stock bolt, I don't think the hammer would be the problem but you never know.

steveomonster · May 15th, 08:40 PM

sweet I really need that 2nd one. is there a 2nd for all spyders, or just the long bolt or short bolt or xtra,e-99 flash open bolt or whatever its called. flush cocking, you get the point.

Torch · May 15th, 09:20 PM

From what I understand, all the versions are covered in the exchange.

**Weever** · May 24th, 09:17 AM

Do anyone have a picture of the top cocking one ? I was wondering if I bought the new version, or the old one...

**conartist2k1** · May 29th, 06:21 PM

i have version 1... do you guys think i should hold it? i have no problems with it whatsoever, and it's workin like a charm. :-P

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