[harrison]

What are HK Thread Pitches & Locking Pieces for suppressed HK91, HK53, MP5 .40 S&W

Title says it all, or asks what I want to know.



TIA- Thanks In Advance!!

 

[jdonovan]

there is a guide to locking pieces here: Guide to HK Locking Pieces

barrel threading on the rifles should be 15x1 RH, and the MP5-40 was not generally a civilian offering in the US, and I've seen a few different pitches as well as 3-lug's on the MP5 10/40's. Factory pitch would be 14X.75 RH.

 

[JTinIN]

The thread tip on the 9mm "Navy" three lug's tend now days to be either 1/2 by 28 or 1/2 by 32 (standard for Colt 9mm etc.)

 

[mt162]

Colt 9mm is actually 1/2 x 36

 

[axehole]

PDW HK barrels are 1/2 x 32 after market offers both threads.