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Systema Bucking Help


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#1 Lt. Tony

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Posted 08 October 2008 - 09:18 PM

Hello, everyone I have a problem that I need some help with. I have a KWA M4 and need some help on installing a systema bucking. I can't get that thing in there to save my life. Now I know people said lube it up, but what do I lube the inside or the outside of the bucking. Should I just order another bucking. I'm going to out it in the freezer tomorrow hopefully that will contract it enough so that I can get it in. The stock bucking takes like 2 seconds to reinstall, but this systema bucking has took nearly 3 days. Any help or suggestions would be great

#2 Doctor Kajita

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Posted 08 October 2008 - 11:29 PM

View PostLt. Tony, on Oct 8 2008, 10:18 PM, said:

Hello, everyone I have a problem that I need some help with. I have a KWA M4 and need some help on installing a systema bucking. I can't get that thing in there to save my life. Now I know people said lube it up, but what do I lube the inside or the outside of the bucking. Should I just order another bucking. I'm going to out it in the freezer tomorrow hopefully that will contract it enough so that I can get it in. The stock bucking takes like 2 seconds to reinstall, but this systema bucking has took nearly 3 days. Any help or suggestions would be great

You can try cutting it so it doesn't bunch up or you can try a different bucking.  I was never able to get the Systema or any aftermarket bucking to fit with the KWA hop-up unit.  

To remedy this, I changed out the KWA hop-up with a Marui one.  You also have to change the air nozzle to a Marui one, which requires you to take apart the gear box.  If you're not willing to go that far, I'd suggest just leaving the stock bucking in.

I created a thread about the Marui hop-up mod.

#3 Lt. Tony

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Posted 09 October 2008 - 07:00 AM

View PostDoctor Kajita, on Oct 9 2008, 03:29 AM, said:

You can try cutting it so it doesn't bunch up or you can try a different bucking.  I was never able to get the Systema or any aftermarket bucking to fit with the KWA hop-up unit.  

To remedy this, I changed out the KWA hop-up with a Marui one.  You also have to change the air nozzle to a Marui one, which requires you to take apart the gear box.  If you're not willing to go that far, I'd suggest just leaving the stock bucking in.

I created a thread about the Marui hop-up mod.

Is all of this worth the increase in accuracy, is there a increase in accuracy. I'd be willing to do it if it's worth it. Would a systema air nozzle, and TM stock hop up do the trick?

Edited by Lt. Tony, 09 October 2008 - 07:15 AM.


#4 threadkill

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Posted 09 October 2008 - 07:57 AM

In my humble and limited experience, your accuracy-related money is better spent on a tight bore barrel, and then using the same bucking and hop chamber. Also much easier for a noobie (I am one).

Other than a new barrel, I'm found that a Big Hop H-Nub or similar shaped nub replacement with the stock bucking a better alternative.

Few have successfully installed the Systema bucking, so you are not alone. As far as the increase in accuracy being worth it, heck yes, if it works. Question is whether a stretched an coaxed and trimmed bucking would even be as accurate as stock. My limited testing indicated that it was worse.

Edited by threadkill, 09 October 2008 - 07:58 AM.


#5 Lt. Tony

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Posted 09 October 2008 - 10:02 AM

View Postthreadkill, on Oct 9 2008, 11:57 AM, said:

Other than a new barrel, I'm found that a Big Hop H-Nub or similar shaped nub replacement with the stock bucking a better alternative.

Few have successfully installed the Systema bucking, so you are not alone. As far as the increase in accuracy being worth it, heck yes, if it works. Question is whether a stretched an coaxed and trimmed bucking would even be as accurate as stock. My limited testing indicated that it was worse.

Big Hop H-Nub. What is it?, and where can I get one from. And when I said was it worth it I meant to replace the hop-up with a Mauri one, and a new air nozzle. BTW if I were to replace the hop-up with a Mauri one, could I use a Systema air nozzle?

#6 Doctor Kajita

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Posted 09 October 2008 - 12:06 PM

View PostLt. Tony, on Oct 9 2008, 08:00 AM, said:

Is all of this worth the increase in accuracy, is there a increase in accuracy. I'd be willing to do it if it's worth it. Would a systema air nozzle, and TM stock hop up do the trick?

If you like to tinker and take stuff apart, learn how your gun works, etc, then yeah, it's worth it.

View PostLt. Tony, on Oct 9 2008, 11:02 AM, said:

Big Hop H-Nub. What is it?, and where can I get one from. And when I said was it worth it I meant to replace the hop-up with a Mauri one, and a new air nozzle. BTW if I were to replace the hop-up with a Mauri one, could I use a Systema air nozzle?

Here's an example of a H nub: http://ebaybanned.co...roducts_id=1080

Any Marui compatible air nozzle will work, so basically, any M4/M16 air nozzle, including the Systema one.  The difference between those and the KWA nozzle is a rail on the top of the nozzle that slides into a slot on the hop-up unit.  

Another alternative without having to take apart the mech box is to dremel off the rail on the KWA nozzle, but you'll have to be good with a dremel and sand it down.  This way, you only replace the hop-up unit.

#7 Lt. Tony

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Posted 09 October 2008 - 05:07 PM

Where would I put this H-hop at in my gun, and would would it accomplish?

#8 brooklyn468

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Posted 09 October 2008 - 05:58 PM

View PostLt. Tony, on Oct 9 2008, 08:07 PM, said:

Where would I put this H-hop at in my gun, and would would it accomplish?

You would insert this in the hop- up unit, and it would give your bb an increased spin on the bb over a regular nub. :)

#9 Stealthmaster14

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Posted 09 October 2008 - 08:47 PM

I'm not sure if it is increased spin, I think it is more consistent spin.

#10 Doctor Kajita

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Posted 09 October 2008 - 10:36 PM

View PostStealthmaster14, on Oct 9 2008, 09:47 PM, said:

I'm not sure if it is increased spin, I think it is more consistent spin.

Correct.  It provides two points of contact instead of just one down the middle of the bb.  The result should be a straighter flight more often.

#11 Lt. Tony

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Posted 10 October 2008 - 12:50 PM

How would I install this piece in my hop up. Does anyone have any links to sites that give step by step directions. and will this piece go flawlessly into my KWA hopup

#12 Doctor Kajita

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Posted 10 October 2008 - 02:24 PM

View PostLt. Tony, on Oct 10 2008, 01:50 PM, said:

How would I install this piece in my hop up. Does anyone have any links to sites that give step by step directions. and will this piece go flawlessly into my KWA hopup

This kid explains it pretty well.  It should fit fine.


Edited by Doctor Kajita, 10 October 2008 - 02:24 PM.


#13 brooklyn468

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Posted 10 October 2008 - 04:50 PM

If you prefer a written eplaination of how to install one, take a look at this -

http://www.airsoftre...w...=118&cat=49




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