I wouldn't stress, there are a lot of talented machinists here, there will be a viable solution to add a three lug to the German barrel.
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Thomas Jefferson -
"When government fears the people, there is liberty. When the people fear the government, there is tyranny."
"Those who hammer their guns into plowshares will plow for those who do not."
What HK could definitely do is something along the lines of what they do with MR barrels: Hammer forge the blanks in Germany and then finish them in Newington, NH. Just a thought / option. What is for sure is if they marketed HK 3-lug threaded barrels for the k, they would sell them quicker than they could produce them.
"The problem with socialism is eventually you run out of other people's money" ~ Margaret Thatcher
NRA Endowment - Life
GOA Life Member
I'll take Aubert & Duval steel barrel blanks from HK Germany and have them finished here any day of the week.
"...but just like every other clone, they are copies of the original and copies are never as good as the original."
Contact - Heckler & Koch
I believe that is/was a manufacturing JV of some sort with Wilcox.
Isn't it a pain in the ass to re-barrel an MP5 anyway though? It's not exactly a quick swap, is it?
Nope, it's not. It's do "do it yourself project" for at least 99% of us.