Jump to content


Part No.89


  • Please log in to reply
15 replies to this topic

#1 samtheman

samtheman

    Newbie

  • Members
  • Pip
  • 21 posts
  • Gender:Male
  • Location:Nashville
  • Country:

Posted 16 March 2013 - 07:15 PM

What is it, and what does it do? It randomly came loose during a game and jammed my gun up. No damage was caused, but it prompted me to further investigate the upper receiver. Nothing appeared to be missing so I played the rest of the day with no change in performance or reliability.I don't like having guns in pieces, but is this a part that urgently needs to be replaced?

Edited by samtheman, 16 March 2013 - 07:16 PM.


#2 akiraspeedstar

akiraspeedstar

    Guru

  • Members
  • PipPipPipPip
  • 1,130 posts
  • Gender:Male
  • Country:

Posted 16 March 2013 - 07:22 PM

It stabilizes the upper rail, without it the rail will wobble a little more though it'll still function fine. A couple of users had the rail snap in half though this was with flp to the side magnifiers and what not.

#3 gcw360

gcw360

    Supreme Guru

  • Super Moderator
  • PipPipPipPip
  • 11,591 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Airsoft (Especially repair and customizing), Fly Fishing, Fossils (Especially Dino), Snakes, Photography
  • Country:

Posted 16 March 2013 - 07:32 PM

View Postsamtheman, on 16 March 2013 - 07:15 PM, said:

What is it, and what does it do? It randomly came loose during a game and jammed my gun up. No damage was caused, but it prompted me to further investigate the upper receiver. Nothing appeared to be missing so I played the rest of the day with no change in performance or reliability.I don't like having guns in pieces, but is this a part that urgently needs to be replaced?
It's not going to adversely affect your guns performance.  Rather, it stabilizes the top rail.  How old is your gun?  If it is within warranty you may want to send it in for replacement.  If not, you can buy a new top rail.  You would need to call KWA to do a top rail purchase since it is not listed in the Pro Shop.

Hope this helps.

#4 samtheman

samtheman

    Newbie

  • Members
  • Pip
  • 21 posts
  • Gender:Male
  • Location:Nashville
  • Country:

Posted 16 March 2013 - 07:40 PM

Sadly, my warranty ran out long ago...... I kept the piece which seems fine, I just cant see how to reattach the thing.

#5 jonsun81

jonsun81

    Enthusiast

  • Members
  • PipPip
  • 169 posts
  • Country:

Posted 16 March 2013 - 08:11 PM

Mine finally fell out....I just threw on a madbull rail fix and the top rail is solid

#6 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 16 March 2013 - 10:07 PM

View Postsamtheman, on 16 March 2013 - 07:40 PM, said:

Sadly, my warranty ran out long ago...... I kept the piece which seems fine, I just cant see how to reattach the thing.

Once part 89 falls out there really isn't anyway to re-secure it...between the vibration from the BCG and the jostling of optics on the top rail.


Posted from my iPhone

#7 ky2970

ky2970

    Enthusiast

  • Members
  • PipPip
  • 182 posts
  • Country:

Posted 17 March 2013 - 02:12 AM

Yeah once it's out it's out. My flip to side magnifier wrecked my top rail and split it in half. You'll be completely fine if you don't have any heavy optics attached and are just careful.

#8 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 17 March 2013 - 11:07 AM

View Postky2970, on 17 March 2013 - 02:12 AM, said:

Yeah once it's out it's out. My flip to side magnifier wrecked my top rail and split it in half. You'll be completely fine if you don't have any heavy optics attached and are just careful.

That's exactly why I run a DD Omega rail. It sits close enough to the rail on the upper to give the impression its mono & close enough that I just mount my optics on it; takes rail wobble & part 89 issues out of the equation.


Posted from my iPhone

#9 ky2970

ky2970

    Enthusiast

  • Members
  • PipPip
  • 182 posts
  • Country:

Posted 17 March 2013 - 08:31 PM

I'm running a RIS II. I bought a new upper rail and keep a madbull rail fix on there now.

#10 pingupenguins

pingupenguins

    Newbie

  • Members
  • Pip
  • 18 posts
  • Gender:Male
  • Location:NorCal
  • Country:

Posted 07 April 2013 - 06:36 PM

Could I epoxy the part in before it pops out? Perhaps give it more durability? Trying to make sure my new LM4 doesn't end up with all the typical problems.

#11 gcw360

gcw360

    Supreme Guru

  • Super Moderator
  • PipPipPipPip
  • 11,591 posts
  • Gender:Male
  • Location:New Jersey
  • Interests:Airsoft (Especially repair and customizing), Fly Fishing, Fossils (Especially Dino), Snakes, Photography
  • Country:

Posted 07 April 2013 - 06:42 PM

View Postpingupenguins, on 07 April 2013 - 06:36 PM, said:

Could I epoxy the part in before it pops out? Perhaps give it more durability? Trying to make sure my new LM4 doesn't end up with all the typical problems.
I would play until...if ever...it breaks.  Mine hasn't.  Not all do and it's been reinforced since the launch so you may never encounter the issue.

#12 BeachEMT

BeachEMT

    Specialist

  • Members
  • PipPipPip
  • 533 posts
  • Gender:Male
  • Location:People's Republic of California
  • Interests:Engineering, Emergency Medicine
  • Country:

Posted 07 April 2013 - 08:00 PM

Epoxying something generally isn't stronger than the OEM bond. I think that part 89 is actually embedded into the upper rail during casting. That is much stronger that trying to adhere epoxy to metal.

#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 07 April 2013 - 08:26 PM

Additionally, application of epoxy on top of the part for preventive measures will probably cause more problems...


Posted from my iPhone

#14 BeachEMT

BeachEMT

    Specialist

  • Members
  • PipPipPip
  • 533 posts
  • Gender:Male
  • Location:People's Republic of California
  • Interests:Engineering, Emergency Medicine
  • Country:

Posted 07 April 2013 - 08:57 PM

View PostR_King91303, on 07 April 2013 - 08:26 PM, said:

Additionally, application of epoxy on top of the part for preventive measures will probably cause more problems...

Yeah, I doubt the charging handle with have enough clearance if you add any material under there.

#15 akiraspeedstar

akiraspeedstar

    Guru

  • Members
  • PipPipPipPip
  • 1,130 posts
  • Gender:Male
  • Country:

Posted 08 April 2013 - 10:48 PM

I cleaned it up and added epoxy and that only lasted a couple games before falling out.

#16 ky2970

ky2970

    Enthusiast

  • Members
  • PipPip
  • 182 posts
  • Country:

Posted 10 April 2013 - 06:16 AM

I tried it as well and it fell back out after moderate usage. You should be fine without it as long as you don't put a really heavy optic and shake it around.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users