Haenelistklasse Posted November 30, 2019 Report Share Posted November 30, 2019 I was just wondering if anyone on the board has actually changed the barrel on their MP40. I would like to know what the process is and what all is involved. I just want to stress that this is for my information only as I would not want to change my own barrel. I would send it to an expert like Bubba Naess to do it for me. Thanks for any responses. Link to comment Share on other sites More sharing options...
RoscoeTurner Posted November 30, 2019 Report Share Posted November 30, 2019 I've changed barrels on MP40s numerous times, it is a very simple procedure if you are using complete barrel assemblies. All you have to do is loosen the barrel nut, remove the barrel and reverse the procedure to install the same barrel or a different one. Link to comment Share on other sites More sharing options...
huggytree Posted November 30, 2019 Report Share Posted November 30, 2019 Ive fully dissembled my mp40 If your new barrel has the sights on it , its a 5-10 min job. No need to send it to anyone Everything is simple on a mp40. Have no fear Link to comment Share on other sites More sharing options...
TSMGguy Posted November 30, 2019 Report Share Posted November 30, 2019 Changing the barrel itself rather than the entire barrel assembly is a bigger job involving the removal of the resting bar and the front sight base. The original pins are easily drifted out. Bergflak sells original pin sets for the whole gun or just the pins needed. The pins are of a rather special design, with each one countersunk on the ends to make flaring easy on reassembly. The barrel is notched for the front sight base pin, so a drill press will be needed to form the notch on the new barrel. The same pin holds the front sight hood on. Fitting and alignment are critical, so if the gun isn't a beater, I'd leave this job to the experts. Link to comment Share on other sites More sharing options...
Haenelistklasse Posted November 30, 2019 Author Report Share Posted November 30, 2019 The barrel assembly that I bought is not quite complete. It looks to be 100% original but unmarked and is missing the front site hood, the resting bar and the barrel nut. It does have the trunnion though. I bought it because I have never seen a bore so minty and clean. This barrel came out of a 50+ year collection so I am pretty certain it is a very late war barrel. I figure the barrel that I have on my beater blaster MP40 has all the parts I need they just need to be taken off. Does the trunnion need to be cut off the replacement barrel and the one in the gun is brazed to the replacement barrel? Just curious... Link to comment Share on other sites More sharing options...
Petroleum 1 Posted November 30, 2019 Report Share Posted November 30, 2019 Post a pic of the barrel Link to comment Share on other sites More sharing options...
huggytree Posted November 30, 2019 Report Share Posted November 30, 2019 (edited) A barrel nut holds it in the trunion The front part is soldered on You can heat it up and remove and place on new barrel. Takes a torch $25 and flux. Medium skill level required. I did my own Gun smiths are 6-12 months out. Its easier and cheaper to find a barrel with the front part soldered on Edited November 30, 2019 by huggytree Link to comment Share on other sites More sharing options...
colt21a Posted November 30, 2019 Report Share Posted November 30, 2019 Send it to Ohio Ord they still work on MP-40'S i am sure. and if the few i know are still there. one knows MP-40s real well. He built them and barreled them. good luck in whatever you do. And get it done right maybe one day i will tell the tale of the post MP40' that was the disaster from hades. Made IT right almost by somebody who by the end did not care.RON K. Link to comment Share on other sites More sharing options...
Haenelistklasse Posted November 30, 2019 Author Report Share Posted November 30, 2019 OK, I am ready for your story about the post MP40. I have plenty of time today as I am snowed in. It is blizzard weather here. Can't wait to get back to Arizona soon! Link to comment Share on other sites More sharing options...
huggytree Posted December 1, 2019 Report Share Posted December 1, 2019 Ohio ord was one of my smith horror stories. The had myMp40 for months. No quote. Finally told me 6-9 months to get to it and $2700 to fix after multiple phone calls. Sent it to another smith. $600 and done in a month. Looks like new. Only needed refinishing and minor welding on tube to tighten twist . Owner was arrogant and nasty. Charged me $100 extra beyond return shipping just to make me more angry. Link to comment Share on other sites More sharing options...
Haenelistklasse Posted December 1, 2019 Author Report Share Posted December 1, 2019 May I ask who your other smith was? Just curious... Link to comment Share on other sites More sharing options...
huggytree Posted December 1, 2019 Report Share Posted December 1, 2019 (edited) Local Smith here in WI. He does samples Pm me for his name For big name smith Id use Andrewski. Local smith made my gun rock solid. Edited December 1, 2019 by huggytree Link to comment Share on other sites More sharing options...
Petroleum 1 Posted December 1, 2019 Report Share Posted December 1, 2019 OK, I am ready for your story about the post MP40. I have plenty of time today as I am snowed in. It is blizzard weather here. Can't wait to get back to Arizona soon!We got our blizzard in colo last tues Im ready for AZ too...heading back on Tuesday. Ha Link to comment Share on other sites More sharing options...
TSMGguy Posted December 1, 2019 Report Share Posted December 1, 2019 (edited) ... Does the trunnion need to be cut off the replacement barrel and the one in the gun is brazed to the replacement barrel? Just curious... This might be a question of nomenclature. The trunnion should be brazed into the receiver. Some very late guns have a big crimp. Either way, the barrel just slides into the trunnion, and is secured by the barrel nut. The nut is torqued and then locked in place by staking the thin steel locking ring. A true original MP40 armorer's spare barrel will have all normal inspection and proof marks, but will lack a serial number. I know they exist, but I've never seen one. Invariably, what someone refers to as an armorer's spare is a serial numbered barrel from another gun, making the gun a mismatch. I had a true armorer's spare NOS MP40 bolt, complete, with no serial number. It sold for big bucks. With that bolt in place, a nice bolt mismatch gun was turned into one with no mismatched serial numbers. Edited December 1, 2019 by TSMGguy Link to comment Share on other sites More sharing options...
huggytree Posted December 1, 2019 Report Share Posted December 1, 2019 (edited) Front sight base or whatever you want to call it is soldered on I had to remove mine. I heated up and removed mine off my old barrel and added flux to the new barrel, heated it up and pushed it on. Its on and wont come off, so my swap worked without adding new solder If you know someone who is handy and can use a torch its a 10 min job. Edited December 1, 2019 by huggytree Link to comment Share on other sites More sharing options...
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