These are standard Mil-Spec bird cage flash hiders that are threaded 1/2x28. Bored out center for a 9mm round to safely pass through. These will not work on RRA, CMMG, YHM, or Colt 9mm's as their threads are 1/2x36. Please Verify the threading that you need. Crush Washer Is Included
Posted by Unknown on 28th Jan 2017
As my title says...
Posted by Unknown on 3rd Jan 2017
I found out that the 9mm barrel I ordered was 28 TPI and not the 9mm standard of 36 TPI. After searching around, I found this Spike's tactical A2 Birdcage in 28 TPI bored for 9mm and with the crush washer! This was prefect for my build and definitely the right price. Fast shipping from 9mmAR as well. Installed without issue on my barrel and looks great!
Posted by Unknown on 29th Dec 2016
I bought an ar9 barrel knowing it had a goofy thread pattern (1/2x28 for a 9mm barrel?) but already planned on putting an A2 style flash hider on it. Glad someone makes this product as it saved me from having to drill one out myself. Fast shipping and delivery even right around Christmas.
Would buy again.
Posted by Unknown on 27th Feb 2016
I got a good deal on a barrel with out realizing the threads were 1/2 x 28. 9mm AR to the rescue. Fast, good tracking on the shipping, no complaints. FWIW the picture looks like the slots encompass the flash hider but the one I received the bottom is full, like a normal A2 flash hider. But I like that better so win win.
All prices are in USD