Thanks for your time putting that together.

Great thread. The duramags are where it’s at. Sgammo has some 20 rounders right meow.
I’m put about 1500 suppressed rounds through my PSA complete upper without issue. And I can only count one FTF when I was helicopter hog hunting and shooting a lot.
I have a friend wanting one and I will use your thread and parts suggestion for his.

Some guns will run with M4 extensions

Some people/manufacturers open them up.

I think Olympic started with the cup cut

Attached File


Most just open them up a bit

Looks like Black Rifle Arms pulled the 7.62x39 barrels from their site.  Does anyone know if they will be making more or if anyone has them in stock?  

Looks like I can subscribe on KAKs website.  I am hesitant to jump into the diamond cut YHM because I would have to chop that barrel and not sure how much meat would be left in those cuts for threads.  At that price I just dont want to bother with that.  Am I missing any other name brand  verified .311 bore manufacturers?

Thanks and please @ me with any ideas so I can quickly follow up.  I know things are often forgot or missed in the sub forums.

I just use standard M4 extensions but I'm also using an MGI lower that uses unmodified AK mags/drums.