[kylem_8]

Hello:

I am going to assist anyone that is considering replacing the Clear Plastic Lower Receiver with a Metal Lower Receiver. The following is information on the problems that I experienced when converting the KJW M4 to a full metal gun.

Firstly, if you don’t know anything about GBBR or their real steel counterparts when it comes to the trigger mechanism, DON'T ATTEMPT TO DO IT YOURSELF. There are many small pieces and springs in the trigger mechanism that if you disassemble (which is very easy to do), you may either loose the piece, or forget how it goes together.

If you do know how to work with the trigger mechanism, then you'll do just fine transferring it over to the new metal receiver.

The issue came about when trying to remove the buffer tube from the clear receiver. There is a steel ring that holds the buffer tube securely into the lower receiver. This piece could not be removed without damaging the plastic receiver. It is made by the forces of God himself to make sure that your buffer tube never leaves the Clear Lower Receiver. Absolutely every attempt was made to try to simply unscrew the brass buffer tube from this steel ring with it turning 1/4 of a turn. All sorts of tools were used with no success. Even using chemistry (heating and cooling the parts for expansion and reduction of their overall size) did not work. The chemistry method was used because of the suspected use of Red Locktight (which was confirmed later on). I was hoping to crack the glue. That didn't happen.

So, with me frustrated out of my mind I was left with only 1 option. To cut it out of the receiver. THIS WILL RUIN YOUR PLASTIC RECEIVER. But, who cares. You now have a metal one. Why do you need the clear plastic receiver?

Once you have the steel ring removed from your Clear Lower Receiver (the brass buffer tube is still attached), the issue remains of unscrewing this steel ring. There is only 1 option (Which is very easy to do). You must use a Dremmel with a cutting tool to CAREFULLY grind down 1 of the notches. You will know that you've gone far enough because the steel ring actually snaps open. That’s right, the reason you have such a difficult time unscrewing the brass buffer tube is because the steel ring is pressed onto the buffer tube.

Now that you finally have just the brass buffer tube in your hands its time to screw it in to the Metal Lower Receiver.YAY. But, this will most definitely take some muscle to do. KJW has painted over the threading so you need to just keep working the buffer tube in to the receiver so the paint comes loose and gives way.

At this point I must let you know that you must screw it in all the way until the greyish silvery piece that actually holds the buffer piston (I think that’s what its called), inside the buffer tube. If you do not screw it to that part, when you cock your weapon, it will only come back half way. The issue was that the Bolt Carrier got stuck on this piece. Which meant that I had to unscrew the brass buffer tube and push down on that greyish silvery piece so the bolt could move fully forward.

So, now you should have a full metal KJW M4 in your arsenal.

Hope this helps when you get your metal receiver.



Kyle

EDIT* DON'T MESSAGE ME ON WHERE I GOT MY METAL RECEIVER