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Top Dead Centre Mod v. Action Army Hop Up Chamber

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Old December 18th, 2016, 22:03   #1
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Top Dead Centre Mod v. Action Army Hop Up Chamber

For those with sniper upgrade experience,

Does anyone know if their are greater benefits to the TDC mod over the action Army Hop Up chamber?
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Old December 18th, 2016, 22:19   #2
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Better yet: TDC on an action army chamber
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Old December 18th, 2016, 22:59   #3
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I used the stock chamber on my M24 with the TDC mod. Worked like a charm!
After doing that and getting great results decided to save my cash and run the stock chamber. I did have to shim it slightly as it the arm was off center.
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Old December 18th, 2016, 23:46   #4
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Originally Posted by ThunderCactus View Post
Better yet: TDC on an action army chamber
would that work well? the AA chamber looks like the pdi one where the arms are lifted from setscrews in the bottom and tenssion comes from o rings. the TDC would work beter with a stock or laylax unit i think.
i guess if you could put springs under the arms above the set screws and then add 2 smaller TDC mods you could still use the two arm adjustability if the pdi style chamber.
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Old December 19th, 2016, 02:06   #5
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Better yet: TDC on an action army chamber
Would that really work? I hope so.

I believe the AA Hop Up chamber actually botttoms out at some point. In the photo, you can see where the arm extends past the nub holder. I feel like the arm would reach a ledge, rendering a TDC useless. Just my thought.
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Old December 19th, 2016, 09:41   #6
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Would that really work? I hope so.

I believe the AA Hop Up chamber actually botttoms out at some point. In the photo, you can see where the arm extends past the nub holder. I feel like the arm would reach a ledge, rendering a TDC useless. Just my thought.
Same issue would arise from a stock chamber too. It will bottom out the arm with too much travel. A taller nub will compensate if you're not having enough travel.

I've got myself a pdi clone chamber for l96 that I'm working on installing in my javelin m24 (snow wolf rebrand) and I already had tdc done on stock chamber. So I made a new single arm from some key stock and I'll have a spring lifting the arm up, while tdc screw applies pressure/positioning down. I just need to remake my sleeve to bush the hop chamber to the outer barrel.
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Old December 19th, 2016, 10:09   #7
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TDC will work wonderfully on the AA chamber. But it also works wonderfully on the stock chamber, so you might as well save some cash and use the stock chamber. Simply put, it doesn't really matter which chamber you use for a TDC, so you might as well use the cheapest option.
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Old December 19th, 2016, 11:34   #8
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TDC will work wonderfully on the AA chamber. But it also works wonderfully on the stock chamber, so you might as well save some cash and use the stock chamber. Simply put, it doesn't really matter which chamber you use for a TDC, so you might as well use the cheapest option.
I like how you think!

On a side note, I think the dangerwerx Hop up arm is stronger than the AA arm. The TDC mod would apply pressure with less flex in the arm if that's true
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Old December 19th, 2016, 11:45   #9
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I wouldn't worry about that, these arms are all strong enough, you could TDC with the stock plastic arm and it would work fine. If you plant to use an r-hop, don't forget that you will need a flat arm with an m-nub or an arm that can use a large nub such as the prometheus. You could also make do with the male leaf arm.
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Old December 19th, 2016, 13:24   #10
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Same issue would arise from a stock chamber too. It will bottom out the arm with too much travel. A taller nub will compensate if you're not having enough travel.
I double checked my chamber today, I don't think it would bottom out the same way an AA would. I attached a picture that shows the arm could travel freely as far as the bucking and bb will allow.
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Old December 19th, 2016, 13:28   #11
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Yet again, the stock chamber is the best. The others are just gimmicks anyway.
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Old December 19th, 2016, 13:43   #12
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I wouldn't worry about that, these arms are all strong enough, you could TDC with the stock plastic arm and it would work fine. If you plant to use an r-hop, don't forget that you will need a flat arm with an m-nub or an arm that can use a large nub such as the prometheus. You could also make do with the male leaf arm.
Would the dangerwerx arm not be enough? its a strengthened version of the stock arm, but you can buy them with a flat bar or two-prong nub
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Old December 19th, 2016, 14:45   #13
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Depends, if you want to r-hop, ideally you remove the bump completely and use something like an m-nub. Otherwise, the flat bar arm is the best.
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Old December 19th, 2016, 15:23   #14
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I do want to rhop the barrel. So I would ground the nub she off the stock VSR arm, and super glue an m nub to it? I'm confused.
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Old December 19th, 2016, 15:28   #15
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Its a bit more complicated then that.

You also have to cut the m-nub so that it makes FLAT contact with the r-hop patch , since the arm is at an angle. You also might have to position the m-nub slight off center depending on your hop to get it to make straight contact depending on the tolerances of your hop-up unit.... all of which oyu can only figure out once you resembled it... so gluing and un-gluing...tons of fun.
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