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User Panel
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Posted: 10/13/2020 2:01:01 PM EDT
[#1]
No - it would need to be bored out.
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Posted: 10/13/2020 2:01:22 PM EDT
[#2]
No the outer diameter of a 9mm is .355/.356”. All of the A2 FH I’ve measured have a smaller ID, which would cause the front of your barrel to become toast / scrap metal.
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Posted: 10/13/2020 2:26:58 PM EDT
[#3]
That's what I was thinking.
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Posted: 10/13/2020 2:28:52 PM EDT
[#4]
that's why they originally did 1/2x36 for 9mm threading on pccs/ars so people couldn't do that. i buy or recut all mine to 1/2 x 28 so it fits my suppressors (9mm)
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Posted: 10/13/2020 3:02:58 PM EDT
[#5]
Yes, one time only though. Stop and think a 9mm is .355 and a 5.56 is .223. Now you tell me.
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Posted: 10/13/2020 3:56:04 PM EDT
[#6]
Square peg. Round hole. Just no. Don't do it but if you do, video it.
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Posted: 10/13/2020 4:23:25 PM EDT
[#7]
Quote HistoryQuoted: that's why they originally did 1/2x36 for 9mm threading on pccs/ars so people couldn't do that. i buy or recut all mine to 1/2 x 28 so it fits my suppressors (9mm) This. They won’t interchange without machining. On a side note. A .380acp (9mm too I guess) will chamber and fire in a .223/5.56 chamber. About .22 of the bullet will exit the muzzle leaving the rest in the chamber/throat, however I don’t recommend doing that. |
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Posted: 10/13/2020 4:25:39 PM EDT
[#8]
el Oh el
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Posted: 10/13/2020 5:24:30 PM EDT
[#9]
If it is a cheapo birdcage style, then I say yes, because I have done it before. Both 1/2" threads.
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Posted: 10/13/2020 7:05:09 PM EDT
[#10]
So get the preferred .223 flash suppressor bored/threaded for the 9MM barrel. This one is pinned/welded, too, since the barrel was shortened from 16" to get that XM177 look I wanted.
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Posted: 10/22/2020 8:28:03 PM EDT
[#11]
Quote HistoryQuoted: Yes, one time only though. Stop and think a 9mm is .355 and a 5.56 is .223. Now you tell me. Or how about you just consider that 9mm is 3.44mm larger than 5.56mm |
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Posted: 12/12/2020 10:46:04 PM EDT
[#12]
I have a 10 inch upper for my M11 subgun, and stupidly swapped out the FH with a .223 birdcage. I can't even remember why I did it. First mag dump didn't sound right and I could have sworn I felt something like sand hitting my arms. Did another mag dump and the same thing, then I realized what I did. No damage to anything. I couldn't find any rounds in the berm, but I guess the jackets, 115gr FMJ, were being stripped off and the lead core was disintegrating to some extent.
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Posted: 12/13/2020 12:44:56 AM EDT
[#13]
Quote HistoryQuoted: Or how about you just consider that 9mm is 3.44mm larger than 5.56mm What is your point? 
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