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Outers, Inners, and FPS. DMR?


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#1 kwaispro727

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Posted 16 January 2014 - 10:51 AM

What outer barrels (if any?) fit the LM4?  I'm assuming due to the hop-up system that it's different than all the after market AEG outer barrels?  

I read and asked briefly about the Falcon 509mm barrel.  I would like to get some more FPS to punch through brush with heavy BBs out of the gun, but after doing the rocket valve mod, I don't really want to sacrifice any more gas per shot because of cool down and efficiency.  Does anyone have a guess or some sort of crude formula for length/bore/FPS for the LM4?

With the rocket valve mod, I also saw much more consistency in FPS after doing the mod.  I'm not sure if it's because I used a valve bought from Evike for the mod instead of the stock one, or the shape of the head now being more flat than cone-like, but it's much more stable.  Within 3 or 4 FPS on most shots.

I would love to make a DMR out of this gun... if anyone has ideas to get more range and accuracy out of it that are more complicated I'm willing to undertake it.

#2 netpoc

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Posted 16 January 2014 - 07:10 PM

I've copied this from one of my past posts:


Although I'm shooting quite a bit faster (~2.6J), I can confirm a combat effective range of around 200 feet with a ~1 foot grouping, with a max range of around 300 feet with around a 2 - 3 foot grouping (Shooting ~415 fps w/ .32).
From my testing it seems that the increase in range came from the 6.01 363mm RA-Tech barrel, as I initially tested the barrel with the stock hop up bucking and arm, with the greater accuracy coming from the EVOII kit (including the maple leaf bucking).

#3 kwaispro727

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Posted 19 January 2014 - 02:13 PM

What is the EVOII kit exactly? I did some research but I still don't understand.  Also, I'm assuming you did the rocket valve mod?

#4 General Pickle

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Posted 19 January 2014 - 04:31 PM

http://www.airsoftta...oods.php?id=760

The kit includes all the parts you'll need to get MASSIVELY increased hop up. The tension arm is stronger, the bucking is a harder polymer, and the sizes of those parts are slightly different so not all parts from the stock LM4 hop up will be cross compatible, but that kit there includes everything you need.

#5 akiraspeedstar

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Posted 22 January 2014 - 11:18 AM

Not sure if its in stock but AirsoftOutletNW also carries it.




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