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CA M24 upgrade issues

2026 Views 7 Replies 3 Participants Last post by  dutton
I have a CA M24 (military). I just installed a 6.03 tight bore and the Classic Army 300% cylinder/spring kit. Thank you, by the way, for the M24 take down guide thread--it made it possible for me to install the upgrades.

The bolt action is much more difficult now. There is also about an inch or so gap between the bolt handle piece and the back (screw down) piece of the bolt.

After installing these upgrades, I was looking for velocity in the 520 fps to 550 fps range using a .20 BB. Instead, I'm hitting about 378 fps ???. This is only a little better than my CA M24 was shooting stock.

I have not yet adjusted the hop-up for the new upgrades.

This doesn't seem right, compared to the other threads I've read in this section.

I'm new to all of this so I would appreciate any and all suggestions/thoughts/"What the hell did you do wrong?" insights.

Thank you, in advance, for your courtesies,

Joe
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My bet would be on an issue with the bucking. Also, could you post pictures of the bolt problem?
Thanks for the suggestion, Dutton. I'll check out the suggested part.

I'm working the photo thing. I thought, worst case scenario, I put in a spacer.
I thought I had purchased the CA 300% kit. Instead, I have the APS-2 Advanced Cylinder Air Spring Kit. Thus, the problem with the bolt piece.

D'OH!

Well, my mistake and I can live with it. Probably. What sort of performance should I be expecting with this set-up and a Mad Bull 6.03 bore?

Sorry for wasting your time, Mosin.

I believe this is the "What the hell did you do wrong?" part of the thread. :-[

Thank you, everyone, for your patience. I'm learning from my mistakes.

Joe
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You can just buy an upgraded APS2 bolt handle and you'll be fine. I chose upgrading with an APS cylinder setup for my M24 over a CA-style one because the boss at the end of the cylinder is longer and a little more stable.

I believe PDI and Laylax make said bolt handle, I'm too lazy to find you a link right now but don't buy it until either Dutton or I have checked it over ifyou do want it because apparently you need someone looking over your shoulder telling you which thing to get heheh
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Embed said:
You can just buy an upgraded APS2 bolt handle and you'll be fine. I chose upgrading with an APS cylinder setup for my M24 over a CA-style one because the boss at the end of the cylinder is longer and a little more stable.

I believe PDI and Laylax make said bolt handle, I'm too lazy to find you a link right now but don't buy it until either Dutton or I have checked it over if you do want it because apparently you need someone looking over your shoulder telling you which thing to get heheh


Good advice about the bolt handle. If either of you folks want to fly in I'll put you up. I can pick your brains about sniping and feed you well.

Thanks for the help, everyone!

Joe
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