Jump to content


Some Clarification..

lm4

  • Please log in to reply
19 replies to this topic

#1 dino325

dino325

    Enthusiast

  • Members
  • PipPip
  • 100 posts
  • Gender:Male
  • Location:Hawaii
  • Country:

Posted 14 May 2012 - 08:49 PM

Hey guys,
Just a quick question/ observation after looking at the parts diagram. One, it looks as if the outter barrel is made of two piece construction, meaning the only thing seperating us from a CQB version is the inner barrel length. Is that a fair assumption? With anybody's past experience, does the inner barrel look proprietary, or can it be swapped with other gbb aftermatket inners?

Secondly, I see the reciecer is not made of one piece, but two halves joined together. I've never had experience with this and was wondering if it creates a weakpoint in the gun with so much going on inside the eciever. Thanks for any clarification! Can't wait for mine this week.

Edited by dino325, 14 May 2012 - 08:50 PM.


#2 Outlaw1995

Outlaw1995

    Guru

  • Members
  • PipPipPipPip
  • 1,713 posts
  • Gender:Male
  • Interests:Acting, Piano, Films, Theatre, Firearms, Knives, Airsoft
  • Country:

Posted 15 May 2012 - 05:10 AM

I believe an inner barrel made for the KSC M4 GBB is compatible, but we won't know until someone tries it. I'm planning on being the guinea pig for that one. And yes, you're assumption is right. The barrel looks to be having a two piece barrel design similar to the KM4 RIS. So, if you are too impatient to wait until the LM4c releases and buy that outer barrel, you can simply remove the locktite and unscrew the barrel extension from your LM4.

#3 R_King91303

R_King91303

    Specialist

  • Members
  • PipPipPip
  • 461 posts
  • Gender:Male
  • Location:Canoga Park, CA
  • Interests:Airsoft, Texas Hold'em, Research (learning new shizz)
  • Country:

Posted 15 May 2012 - 05:52 AM

View Postdino325, on 14 May 2012 - 08:49 PM, said:

Secondly, I see the reciecer is not made of one piece, but two halves joined together. I've never had experience with this and was wondering if it creates a weakpoint in the gun with so much going on inside the eciever.

KWA probably had to make the upper split halves to get ATF approval for the exact reason of your concern; it won't be able to sustain the gas pressure of firing a real bullet. With that said I think AEGs gearbox shells sustain much more abuse than the upper of LM4 will endure.


---
I am here: http://tapatalk.com/map.php?401hg0
Posted from my iPhone

#4 Outlaw1995

Outlaw1995

    Guru

  • Members
  • PipPipPipPip
  • 1,713 posts
  • Gender:Male
  • Interests:Acting, Piano, Films, Theatre, Firearms, Knives, Airsoft
  • Country:

Posted 15 May 2012 - 06:45 AM

View PostR_King91303, on 15 May 2012 - 05:52 AM, said:



KWA probably had to make the upper split halves to get ATF approval for the exact reason of your concern; it won't be able to sustain the gas pressure of firing a real bullet. With that said I think AEGs gearbox shells sustain much more abuse than the upper of LM4 will endure.


---
I am here: http://tapatalk.com/map.php?401hg0
Posted from my iPhone
Although the upper may be made from two pieces, I wouldn't make assumptions about how much abuse it can endure. There is a story that during tests, KWA hooked a LM4 mag up to a air tank and blank fired 12,000 rounds in continuous full auto until an o ring broke. Not sure if an AEG can handle that...

#5 R_King91303

R_King91303

    Specialist

  • Members
  • PipPipPip
  • 461 posts
  • Gender:Male
  • Location:Canoga Park, CA
  • Interests:Airsoft, Texas Hold'em, Research (learning new shizz)
  • Country:

Posted 15 May 2012 - 08:35 AM

View PostOutlaw1995, on 15 May 2012 - 06:45 AM, said:

Although the upper may be made from two pieces, I wouldn't make assumptions about how much abuse it can endure. There is a story that during tests, KWA hooked a LM4 mag up to a air tank and blank fired 12,000 rounds in continuous full auto until an o ring broke. Not sure if an AEG can handle that...

Exactly. It shouldn't be a concern for airsoft use; both gearboxes and the LM4 upper are spilt halved designed.


Posted from my iPhone

#6 aaps59

aaps59

    Guru

  • Members
  • PipPipPipPip
  • 1,149 posts
  • Gender:Male
  • Location:New York City
  • Interests:Airsoft, photography, cars, computers.
  • Country:

Posted 15 May 2012 - 12:04 PM

I assume the barrel switches will be very simple. I have faith in KWA that the receiver will still be very strong

#7 Paullouisj

Paullouisj

    Enthusiast

  • Members
  • PipPip
  • 30 posts
  • Gender:Male
  • Location:Hurst, Texas
  • Interests:Airsoft, Real Steel shooting and tactics.
  • Country:

Posted 15 May 2012 - 01:48 PM

Correct me if I'm wrong but this is a training rifle that mimics the real steel down to detail as much as possible. My RS AR-15 M&P 15 ORC and M&P 15-22 MOE both have split receivers so you can disassemble and clean plus change the uppers out for longer barrels or even different caliber round.
  Every M-16 AR-15 and M-4 I have ever seen have split receivers. Hopefully I didn't read Op's post wrong but I would say if your really worried about it don't worry too much it's part of the AR design.

#8 Nitemare

Nitemare

    Enthusiast

  • Members
  • PipPip
  • 129 posts
  • Country:

Posted 15 May 2012 - 01:54 PM

You're right, this platform does feature both upper and lower receivers -- that isn't what they were referring to though. Apparently, the UPPER receiver is more than one piece, which would be different.

#9 jaybirdritenour2

jaybirdritenour2

    Enthusiast

  • Members
  • PipPip
  • 51 posts
  • Country:

Posted 15 May 2012 - 01:58 PM

View PostPaullouisj, on 15 May 2012 - 01:48 PM, said:

Correct me if I'm wrong but this is a training rifle that mimics the real steel down to detail as much as possible. My RS AR-15 M&P 15 ORC and M&P 15-22 MOE both have split receivers so you can disassemble and clean plus change the uppers out for longer barrels or even different caliber round.
  Every M-16 AR-15 and M-4 I have ever seen have split receivers. Hopefully I didn't read Op's post wrong but I would say if your really worried about it don't worry too much it's part of the AR design.



He is talking about the upper only. The upper actually splits in three pieces. And it wasn't for ATF approval as the KSC and KWA Asian version do also. But that doesn't mean anyone will see it split because of use. I believe this will be one of the most reliable GBBR's on the market.

Edited by jaybirdritenour2, 15 May 2012 - 01:59 PM.


#10 aaps59

aaps59

    Guru

  • Members
  • PipPipPipPip
  • 1,149 posts
  • Gender:Male
  • Location:New York City
  • Interests:Airsoft, photography, cars, computers.
  • Country:

Posted 15 May 2012 - 02:03 PM

Nearly all modern AR's have a splitting upper and lower, so this is normal. But the upper itself on the LM4 splits from left to right. I wonder what the purpose truly is...

#11 R_King91303

R_King91303

    Specialist

  • Members
  • PipPipPip
  • 461 posts
  • Gender:Male
  • Location:Canoga Park, CA
  • Interests:Airsoft, Texas Hold'em, Research (learning new shizz)
  • Country:

Posted 15 May 2012 - 02:48 PM

View Postaaps59, on 15 May 2012 - 02:03 PM, said:

Nearly all modern AR's have a splitting upper and lower, so this is normal. But the upper itself on the LM4 splits from left to right. I wonder what the purpose truly is...

I didn't know the earlier version also had the split. It could simply be just for cost purposes, CNC machining is an expensive process when compared to mold casting.


---
I am here: http://tapatalk.com/map.php?uddlou
Posted from my iPhone

#12 Jatodude

Jatodude

    Enthusiast

  • Members
  • PipPip
  • 203 posts
  • Gender:Male
  • Location:Wisconsin
  • Country:

Posted 15 May 2012 - 03:04 PM

Back to the barrel, can you guys tell where exactly it's split?

#13 R_King91303

R_King91303

    Specialist

  • Members
  • PipPipPip
  • 461 posts
  • Gender:Male
  • Location:Canoga Park, CA
  • Interests:Airsoft, Texas Hold'em, Research (learning new shizz)
  • Country:

Posted 15 May 2012 - 03:13 PM

View PostJatodude, on 15 May 2012 - 03:04 PM, said:

Back to the barrel, can you guys tell where exactly it's split?

Based on the parts diagram, it splits about 1-2" after the triangle sight.


---
I am here: http://tapatalk.com/map.php?r4zedb
Posted from my iPhone

#14 Jatodude

Jatodude

    Enthusiast

  • Members
  • PipPip
  • 203 posts
  • Gender:Male
  • Location:Wisconsin
  • Country:

Posted 15 May 2012 - 03:45 PM

View PostR_King91303, on 15 May 2012 - 03:13 PM, said:

Based on the parts diagram, it splits about 1-2" after the triangle sight.


---
I am here: http://tapatalk.com/map.php?r4zedb
Posted from my iPhone

I can't see the split at all though.  It's as if it's under that sling mount or one of the sight post rings.

#15 Slayer750

Slayer750

    Enthusiast

  • Members
  • PipPip
  • 31 posts
  • Gender:Male
  • Country:

Posted 15 May 2012 - 03:53 PM

The splits are for ease of manufacturing, most likely. Its a lot easier to build complicated things out of less complicated parts.

#16 jaybirdritenour2

jaybirdritenour2

    Enthusiast

  • Members
  • PipPip
  • 51 posts
  • Country:

Posted 15 May 2012 - 04:18 PM

Actually it is done because it is alot easier to drill through half of 14.5 inches. Not every machine shop can do what is called gun drilling or deep drilling. It is a specialty machine needed. Instead of sourcing one, just making it in two parts is sometime easier.

Edited by jaybirdritenour2, 15 May 2012 - 04:21 PM.


#17 Paullouisj

Paullouisj

    Enthusiast

  • Members
  • PipPip
  • 30 posts
  • Gender:Male
  • Location:Hurst, Texas
  • Interests:Airsoft, Real Steel shooting and tactics.
  • Country:

Posted 15 May 2012 - 04:40 PM

Whoa really? This is very interesting on the receiver being split 3 ways. I did not notice it on prototype but also wasn't looking for it.  Is there play or gap in the 3rd split?

#18 Outlaw1995

Outlaw1995

    Guru

  • Members
  • PipPipPipPip
  • 1,713 posts
  • Gender:Male
  • Interests:Acting, Piano, Films, Theatre, Firearms, Knives, Airsoft
  • Country:

Posted 15 May 2012 - 04:45 PM

What we're trying to say is that when you break it down, the LM4 has a lower receiver, (1 piece) and the upper receiver is comprised of two halves. (another 2 pieces) to make 3 pieces in total.

#19 dino325

dino325

    Enthusiast

  • Members
  • PipPip
  • 100 posts
  • Gender:Male
  • Location:Hawaii
  • Country:

Posted 15 May 2012 - 07:04 PM

Wow, thanks for the responses. I assume as with any high end gun, well see a large following and hopefully with that a company which will make custom aftermarket receivers with "Colt" trades ;-)..

#20 dino325

dino325

    Enthusiast

  • Members
  • PipPip
  • 100 posts
  • Gender:Male
  • Location:Hawaii
  • Country:

Posted 15 May 2012 - 07:51 PM

Just conducted some research and found the parts diagram for the KSC M4 version. Inner barrel seems to look very similar to current KWA diagram. Also looked at the Guarder 6.02 barrel for KSC just for reference on Hobby Asia and it looks identical to the KWA diagram as well. Only difference I see, which has been mentioned before, is that the KWA hop-up unit has more parts. This makes me happy ;-)

Reference:

http://shop.ehobbyas...k-18-cqb-r.html

http://kwausa.com/fi...B02_LM4_PTR.jpg

Edit:
The same is noted for the outer barrel as found in the Dytac 10.5" barrel marketed for the KSC which appears the same..

http://www.airsoftba...product_id=2011

Attached Files


Edited by dino325, 15 May 2012 - 08:04 PM.






Also tagged with one or more of these keywords: lm4

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users