AGM MP40 fully overhauled - picture journal

Update

First up a quick look at the revised internals, Opened it up again to change it over to a silent piston head.



Internals, so much more room now!



Then came the real work! Stripping finest Chinese paint to get down to the bare metal. SO much hassle

NITROMORES FTW! Was doing a mates AKMS at the same time



Results



The steel wouldn't give up its paint so I had to wire wheel it.



Wanted a full bolt so cracked out the Dremel and got grinding (took two cutting wheels and 3 stones)

Results



Then I cracked out the cold blue Before (left) and after (right)



Didn't want a perfect blue as I wanted an antique/work horse look. so i applied it quite slap dash

Then did the Ali parts with aluminum black



Then it was just a case of oil and assemble





More in a mo

THE HOP UP MOD - I know it's a big thing with this gun.

Firstly for this you'll need the following (Assuming you've removed the unit from the gun)...

Firstly remove the hop slider, hop arm and barrel spacer and put in a safe place.

Then make a radial cut here



this part of the hop unit should come loose now (i've left the collar on here. It's better to remove it first)



Now you need to GENTLY persuade the hop unit off the the end of the barrel :whistle:



After tapping off the hop you'll be greeted with this. You'll need to find the c clip that's been glued in and remove it with a small bladed screwdriver.



Here it is with the c clip and rubber removed



Right. now you need to cut down this bit of plastic on the end off the barrel. You're gonna use this as a spacer for the new barrel. see below



Now on my tm barrel it was a tight bugger and needed filing. This build relies on friction to hold it together so be careful taking out too much material. (you can always use glue if you mess up) Make sure the groove in the underside of the barrel lines up with the grove in your spacer (you'll see it)

Now pop your choice of hop rubber on. I like to give it a damn good wrap in PTFE for a bit more air seal



Now you need to carefully re assemble the unit by sliding the barrel with collar into you unit (oo er missus) check that the lip of the hop rubber doesn't protrude to far into the feed part of the chamber. best way to do this is shine a light in the nozzle opening and look down the feed tube.

Put the front of the hop unit back on and the barrel collar too. Re assemble the hop arm too. I found that the cut out for the nub was poorly made so I filed off the flash before fitting a H nub.





Like I said this mod uses friction to hold it together. You can use glue but I like to have the option to strip and re build. I will do a full AK hop conversion next. If only to make another guide! Sorry the photo's are a little sparse but I was doing this at 11pm the night before a game!

Post game results were good. I got lots of long range hits and grouping was tight. I did however get some hop creep but i put that down to sub zero conditions and grease migrating from the freshly built cylinder into the hop unit.

Any Qns just ask

and watch this space for the TM ak hop mod

Thanks

Dave

That's for certain. It would be nice when you finish if you tell us how it shoots. FPS and accuracy.

absolutley amazing! i applaud you! great work!

Looks like a very good job but need a follow up. How tuff is it, whats the range and chrono with 25s really cool though great job. I just got rid of selector switch and bondo it.