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Old 03-14-2020, 10:53 PM   #1
Young Gun
 
Join Date: Sep 2016
Location: Western Slope, Colorado
Posts: 26
A&K m24 range loss

I bought an a&k m24 in 2016 up until recently it was great. My setup was
Stock barrel lapped
Maple leaf 70 degree autobot
Custom hop arm
Properly done TDC
AA m150 spring
Some delrin spacers I made for fps fine tuning.
Clocked in at 2.9J.
Setup this way since 2016, range and accuracy have been great. But starting about a month ago I began losing range each time out. At first I lost about 50', then 100, and so on until the rifle had a Max range of roughly 100'. Airseal was still perfect and still shooting 2.9J.
So of course I stripped everything down thinking bucking but it looks fantastic, changed it and cleaned barrel just to be sure, no change. All parts look great, inside the cylinder, hop, everywhere looks perfectly fine.
So I rebuilt her, now she has
ML crazy jet
New ML autobot
New AA 150
Still maxing at 100' or so, still shooting proper velocity literally new barrel tried 3 different buckings and I can't figure it out.

At 150 bucks my next step is just buy a new base rifle and put the upgrades in that. Before I order up a new one and start fresh does anybody have any idea what's happening or how to resolve it.
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Old 03-14-2020, 11:41 PM   #2
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What do you mean you "lost range." Are the shots dipping after 100 feet, or are the just inconsistent?
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Old 03-15-2020, 12:24 AM   #3
Young Gun
 
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I mean It went from 300 to 250, then the next weekend 250 to 200 and so on. 100' or so is where it's at and where it's staying
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Old 03-15-2020, 08:47 AM   #4
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Quote:
Originally Posted by Shockkandawe View Post
I mean It went from 300 to 250, then the next weekend 250 to 200 and so on. 100' or so is where it's at and where it's staying
So.... Again, do you mean that the bb is unaffected by hopup and will be drawn by gravity to drop to the ground at 100 feet?
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Old 03-15-2020, 12:41 PM   #5
Young Gun
 
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Location: Western Slope, Colorado
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Everything works as it should but in a drastically scaled down fashion. I can still hop a .43 to the moon, but it carries nowhere near the range.
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Old 03-15-2020, 12:45 PM   #6
Sodium   Sodium is offline
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This makes no sense at all. Please give us a more vivid description of the difference between past and present. If they bbs are achieving the same accuracy, power, and hopup, then they should be getting the same range...
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Old 03-15-2020, 07:09 PM   #7
Young Gun
 
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Location: Western Slope, Colorado
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I am aware of that, which is why I'm posting here. It makes no sense to me at all. I am truly being as descriptive as possible, all metrics remain the same, it feels the same when you get hit, it chronos the same on a madbull Chrono. I have used multiple of each part in the system as a test and nothing changes it. But this rifle has been a long range champ for 4 years and it nosedived over the past month and a half.
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Old 03-15-2020, 08:02 PM   #8
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Quote:
Originally Posted by Shockkandawe View Post
I am aware of that, which is why I'm posting here. It makes no sense to me at all. I am truly being as descriptive as possible, all metrics remain the same, it feels the same when you get hit, it chronos the same on a madbull Chrono. I have used multiple of each part in the system as a test and nothing changes it. But this rifle has been a long range champ for 4 years and it nosedived over the past month and a half.
Ok, I don't know how to make this any more clear. Range is a very VERY ambiguous and broad term. We can't help you diagnose the problem because we can't tell what the problem is. So please answer this question: Does the bb just stop flying after 100 feet, or does it just become inconsistent. In other words, are you physically unable to hit a target after 100 feet because the bb just can't fly out that far? That would probably be a problem regarding the hopup not engaging in the barrel if your energy output is the same. If your bbs are just less consistent, than that is also a hopup problem most likely, but more so with an inconsistent engagement each shot. I can't give you more specifics cause I don't have enough experience. Please please PLEASE be more specific with how you define "range."
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Old 03-17-2020, 01:13 AM   #9
Young Gun
 
Join Date: Sep 2016
Location: Western Slope, Colorado
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They stop flying after 100 or so feet. Though I am relatively sure this isn't a hopup problem as I maintain functional hopup control. It is effective enough to send a BB 90 degrees from the barrel. The entirety of the flight pattern looks as it did when it was 350 feet but scaled down to 100. There is no air loss, the problem persists through 4 brand new buckings, 2 barrels, 2 separate cylinders and all their components.

It is still a 2.9j rifle, it hurts like one inside of it's max range of 100 feet. It simply no longer pushes the bb anywhere near as far as even a jg m4 might.

It was a progressive problem that happened in noticeable chunks from week to week. No corners are cut, no bullshit diy fixes. All parts in the entire system are pristine, lubed, and assembled properly.
I am fully aware this makes no sense. None whatsoever, yet, I am having the problem.

Lastly it is worth mentioning, this isn't a guessing game on the range, this is a rifle that fired a measured 350, that now fires a measured 100 feet.
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Old 03-17-2020, 03:52 AM   #10
Fynn64   Fynn64 is offline
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So your rifle shot 350 feet and now only shoots 100?
And it’s shooting 2.9J and can overhop your bbs?

Have you tested with different bbs?

This is indeed super weird. If your bb leaves the barrel at 2.9J and can be properly hopped, it shouldn’t stop at 100feet.
Maybe your external forces changed. But they would have to change a LOT to bring your range down 250 feet...
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Old 03-17-2020, 06:33 AM   #11
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Yeah that's weird. Thank you for clarifying. If worst comes to worst, the A&K M24 is cheap enough to buy another...
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Old 03-17-2020, 12:58 PM   #12
Young Gun
 
Join Date: Sep 2016
Location: Western Slope, Colorado
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Different BBs do preform slightly better at times, however, not enough to be considered a fix, maybe +20'.
I'm gonna try a new base rifle and see if that fixes anything.
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