Today we are going to show you how to upgrade your M4 to a metal body. If you follow our instagram you will see custom engraved guns. From custom engraved pistols to engraved metal bodies for M4 / M16’s. Well today we will show you how. Yes this will cost you a good amount of money by the time you are done but it will add a great amount of value to the gun itself. It will also get rid of the dreaded M4/m16 barrel wobble. The whole project should only take about 1 hour. Before you get started, take your metal body off of your gun and or hand gun all the way down to just the body. Then take it to the mall and go to “things remembered” in the mall. They will engrave it for you, just remember to tell them its for a toy and not a real gun. They charge you per image and word and have a set up fee that was like $16. The total for this gun to be engraved was $5 per word $9 for the image and $16 for the set up($30). The metal body was $65.
To get started you will need these items: M4, fresh engraved M4 metal body, long screwdriver, tiny screwdrivers, allen wrench (not for all models ), channel lock pliers or M16 tool, sandwich bags, and a radio.
Step 1) Start with the stock by removing the adjustable shoulder pad. To do this simply pull down on the leaver as shown in the picture. Now slide it all the way off.
Step 2) Remove the small screw at the end of the buffer tube as shown in the picture.
Step 3) Remove the cover plate and place in a sandwich bag along with the small screw. Now get your long cross tip screw driver(Phillips) and remove the screw inside the buffer tube. Once removed slide off the buffer tube then remove the metal plate at the back of the body then also place in the sandwich bag.
Step 4) Now move to the grip and remove the 2 screws on the bottom then place in a separate sandwich bag.
Step 5) Now disconnect the red and black wire. Now lift the motor. Now place the motor in the bag. Now the next 2 screws are a little tricky. Use a magnetic screwdriver and remove the 2 screws at the base of the grip, then place in the sandwich bag. Using a magnetic tip will help hold on to the screws so they don’t fall into the mech box. If they do fall it is a pain in the butt to get them out. If you do drop them just wait until you have the whole mech box out then pull out the screws with a pair of fine tweezers or just shake them out.
Step 6) Now remove the mag catch lever, just unscrew the small screw and the whole assembly will come out, then place in sandwich bag. Now remove the fore grip and disconnect the wire harness/fuse then set aside or in a sandwich bag.
Step 7) Now remove the 3 body pins. starting with the small pin in the center of your body. Now remove the rear pin then the front pin. Place them in a sandwich bag.
Step 8) Now slowly slide the top receiver from the lower receiver about half way then stop. Now pull the charging handle back a little then slowly tip the lower receiver down and away from the top. There is a tiny nub of metal that gets caught on the charging handle so just take it slow. Also the wires should come out nice and easy So don’t pull the receivers apart too fast.
Step 9) Now that the lower receiver is separated remove the mech box from it. (TIP) Tip the mech box forward then up and out of the body. Now just drop it in your new Metal body then set aside.
Step 10) Now slide out the hop up/barrel. Remember to do this operation slowly so that you don’t lose the small spring at the top of the Hop up unit. This is super important.
Step 11) Take the upper receiver and remove the barrel nut. To do this remove the hand grip ring and spring, this will free up the nut. Now use either the M16 tool (shown below ) or a pair of channel lock pliers. I used the M16 tool and I used the section of the tool with 3 teeth(shown in the picture below). Just turn it counter clock wise then unscrew it by hand. Once off just transfer it to the new upper receiver. Now screw on the barrel nut and tighten with M16 tool or pliers.
Step 12) Once your barrel is attached to the new upper receiver, just add your inner barrel/hop up unit to it. To do this place the spring on the unit and stand it up. Now lower the upper receiver onto the barrel. This method will help you keep the spring in place.
Step 13) Now marry the upper and lower receiver together. Simply slide the lower receiver in the upper receiver from back to front. Now stop half way (as shown below )
Step 14 ) Place the wires under the hop up and through the barrel nut. Do this before completely sliding the lower receiver into place. This may prove a little tricky, if so just use some tweezers to help the wires through. Once through, slide the lower receiver into place.
Step 15) Now add the body pins starting with the front pin. Now the small in the center of the body and then the large pin in the rear.
Step 16) Now add the pistol grip. Place the red wire in the front wire hole then the black in the rear wire hole then slide forward to the body. Now add the 2 screws at the base of the grip.
Step 17) Now orient the wires so that that are at the rear of the grip and not blocking the motor hole in the center ( as shown in the picture below) Now drop in the motor. Now place the black wire on the motor post first and then the red wire because the red is longer. Once complete place the motor plate back on with the 2 small screws. Now attach your wire/fuse harness and test your gun. If it doesn’t work you probably placed the wires on the wrong post. It happens. I did it while I was writing this post.
Step 18) Now just add the small metal plate at the base of the buffer tube then add the buffer tube. Use your long screw driver and add on the long screw. Now add the small cover plate and small screw. And lastly add your stock.
Step 19) Now take lots of pics and tell us at airsoftactionfield.com how you did and what you got engraved. Enjoy!
Special announcement. This week we will be at 911 airsoft sports on 31 OCT 2015 from 1000 to 1500. We will be highlighting local teams and their load outs on next weeks post! So get in on the action and we’ll see you there.
Raffle Update: As of today we are at 30. Keep up the good work and tell your airsoft friends. If you want to sign up for the free AEG just scroll to the bottom of the home page and fill out the contact info, that will enter you in the raffle.