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Issue with front sight and handguard - m4a1


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#1 Erkiii

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Posted 23 April 2014 - 03:32 PM

Hello, im owner classic m4a1 kwa (with plastic handguard) and i got problem. So, my front sight is moving. Actually, its not quite much but it makes diffrence while shooting. I can just move it left and right. Together with front sight, moving is imitation of oven and handguard. Have u got guys some ideas? Thanks for help. Sory for English, im from Poland but i hope you will be able to understand.

#2 Chuck S

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Posted 24 April 2014 - 02:27 AM

Either the front sight post is loose on the barrel (it is secured with two pins) or the whole outer barrel is loose in the receiver and moving.  Have you removed either the front sight post or barrel from the gun?

-- Chuck

#3 Erkiii

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Posted 24 April 2014 - 01:09 PM

Loose is sight, barell is ok. Nope i didnt

#4 Chuck S

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Posted 24 April 2014 - 02:54 PM

A couple drops of red Locktite applied at the edges of the sight base -- so the liquid creeps into the joint -- will secure the front sight base.  Will require heat to remove it again though.  Blue Locktite may hold and is easier to remove.

-- Chuck

Edited by Chuck S, 24 April 2014 - 02:54 PM.


#5 Erkiii

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Posted 26 April 2014 - 01:21 PM

U mean where? Could u mark me in paint where should i put glue? Would be very helpful. Sory but im afraid off changing anything and wanna be 100% sure. By the way the part marked red color is too moving. Thanks for help obviously.


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#6 Chuck S

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Posted 27 April 2014 - 02:13 AM

It's normal for the sling swivel to be loose.

A drop or two of Loctite at the joint between the front sight base and barrel should secure it.  Red is permanent (requires a heat gun to crack), Blue is semi-permanent.  The Loctite will creep into the joint (remember capillary action from high school?).  Wipe off the excess in a few minutes,  Little sample tubes of Loctite are usually at my local hardware store.

Someone may have a different solution so give this a day.

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-- Chuck

Edited by Chuck S, 27 April 2014 - 02:14 AM.


#7 Erkiii

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Posted 29 April 2014 - 07:11 AM

Done! Thanks chuck :)

#8 Erkiii

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Posted 03 May 2014 - 12:00 PM

Well, however my problem seems to not be solved. Front sight is still too skewed in left. Is it possible to move it right?

Edited by Erkiii, 03 May 2014 - 12:00 PM.





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