AR15.Com Archives
 Thread Pitch on Mini 14. 580 series Tactical Flash hider?
JRCmx  [Member]
8/3/2011 5:49:34 PM
Anybody know the thread pitch on this rifles flash hider?
I am looking to replace it with something that looks like an M1A FH.
BrowardMason  [Team Member]
8/3/2011 7:57:56 PM
9/16" x 24tpi

Or so my brother says...I called him––he has one.
ManyFNs  [Member]
8/3/2011 10:35:33 PM
It varies, latest is 1/2"-28tpi. Best way to be sure is measure it on your particular gun after you remove the FH. A 1/2" socket drive Torx T-60 bit fits into the front opening of the FH
bw77  [Member]
8/8/2011 9:33:25 PM
Mine is 1/2 x 28.

I believe after 2010 they were 1/2 x 28. You could call ruger and I'm sure they could tell you for sure.
wesmerc  [Team Member]
8/16/2011 11:45:21 AM
Originally Posted By bw77:
Mine is 1/2 x 28.

I believe after 2010 they were 1/2 x 28. You could call ruger and I'm sure they could tell you for sure.


All of the new flash hiders use the standard 1/2 x 28 pitch. I made 700 last week.