m4 loose top rail

[JBall]

hey my top rail is a bit loose on my kwa m4. Can i just remove the rear pin split the gun a tighten it from there or am i going to have to do more? Iv never opend this gun before but if its simple ill give it ago.

[richardy]

Re: m4 loose top rail

isnt there ascrew on top of the rail ? not that i have one infront of me

[Milkybarkid89]

Re: m4 loose top rail

Should just be an Alan key screw on top...

[JBall]

Re: m4 loose top rail

No theres no screw on the top the only thing i can see is a pin going trough at the front but that looks ok.

[Crash]

Re: m4 loose top rail

Pictures shamefully copied and pasted from KWA technical site. :D


Tools:
A punch size 1/16
A Hammer
A Shim or Spacer, size may vary (for our example we use .2 mm)

Step 1
Separate top receiver from the gun

Step 2
Remove the hop-up and inner barrel out of the gun.

Step 3
Rest the top receiver on it's side, locate the roll pin in the front and drive the pin out with punch and hammer.



Step 4
Remove the pin and keep in a safe place.

Step 5
Pull the charging handle back slightly and push the top rail backward.



Step 6
Once the top rail slides back, you can lift the rail up from the front and remove it from the receiver.



Step 7
Place a shim to act as a spacer in the top front of the receiver. You might need to try different sizes depending on the gap.



You can add a drop of glue to secure the spacer/shim. Optional!



Step 8
Place the top rail back on receiver.



Step 9
Drive roll pin back in receiver, and the rail should be secure.

[JBall]

Re: m4 loose top rail

Thankyou ill give it ago later

[JBall]

Re: m4 loose top rail

Worked a treat it was a bit tight getting the pin back in but that can only be a good thing.

I also didnt have to take the barrel out

I can now re fit my Eotech without having to feel it wobble all day :D