I have an issue that is leading me to question all I know about AR’s as well as my sanity…
I cannot install a standard ½ x 28 Silencerco Trifecta flash on my PWS barrel! As soon as I start to screw it on, it seizes. I don’t want to force it on or cross thread it, so I stopped.
I took it to a trusted gunsmith and we tried several other trifectas and had the same issue with all of them.
We tried the same trifectas on a Colt barrel and they all went on just fine.
Standard birdcage flash hiders go on the PWS just fine, along with the standard Triad device.
It seems to be a combination of the Trifecta flash hider and the PWS barrel.
I emailed both Silencerco and PWS and both confirm the standard thread of ½ x 28.
For reference, this is the PSW MK107 MOD1 upper: http://primaryweapons.com/store/pc/view ... ategory=44
I have several other AR’s, all wearing different muzzle devices and have never had an issue like this.
What is going on here? Am I losing my mind?!?!?!?!
Issue with Silencerco Trfecta flash hider and PWS barrel
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- ChimeraPrecision
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Re: Issue with Silencerco Trfecta flash hider and PWS barrel
did your smith run a die of the threads to clean them up?
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Re: Issue with Silencerco Trfecta flash hider and PWS barrel
Most likely there both right at the edge of interface. The Trifecta is probably on the lower side of spec as AR barrels are usually under sized…way under sized on pitch diameter. This one is probably closer to normal spec and they are just barely interfering. Silencerco holds pretty tight tolerances and that is why all of them are acting the same. It is the barrel. The birdcage is threaded slightly deeper than the Trifectas that you are using, that is why it will fit. The smith can fix this pretty easy in a lathe in about an hour tops…
Dave
Dave
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- Andrew@Silencerco
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Re: Issue with Silencerco Trfecta flash hider and PWS barrel
If you would like to send the upper and Flash hider in to us we can take care of it for you. Email or call me tomorrow and I can get you the info you need to send it in.
Re: Issue with Silencerco Trfecta flash hider and PWS barrel
I appreciate it Andrew, but I literally just shipped it off to PWS.
I went back to the gunsmith and on PWS’s suggestion, we tried mounting the flash hider on a tap and it went on a fine, but you can really tell the difference between a standard birdcage and the Trifecta. It’s almost like the Trifecta’s grooves are not machined as deep as other flash hiders, which is not a bad thing until you run across a barrel with the same issue.
I think Dave really hit it on the head when he mentioned that both the barrel and the flash hider are at the edge of tolerance. A millimeter off either one at it would probably have fit just fine.
I’ll keep you all updated…
I went back to the gunsmith and on PWS’s suggestion, we tried mounting the flash hider on a tap and it went on a fine, but you can really tell the difference between a standard birdcage and the Trifecta. It’s almost like the Trifecta’s grooves are not machined as deep as other flash hiders, which is not a bad thing until you run across a barrel with the same issue.
I think Dave really hit it on the head when he mentioned that both the barrel and the flash hider are at the edge of tolerance. A millimeter off either one at it would probably have fit just fine.
I’ll keep you all updated…
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Re: Issue with Silencerco Trfecta flash hider and PWS barrel
Too bad you didn't have another barrel of the same make/model to test as well... because sometimes even colt produces lemons like the first brand new M4A1 I was issued in the army that was cross threaded from colt.dan9591 wrote:I appreciate it Andrew, but I literally just shipped it off to PWS.
I went back to the gunsmith and on PWS’s suggestion, we tried mounting the flash hider on a tap and it went on a fine, but you can really tell the difference between a standard birdcage and the Trifecta. It’s almost like the Trifecta’s grooves are not machined as deep as other flash hiders, which is not a bad thing until you run across a barrel with the same issue.
I think Dave really hit it on the head when he mentioned that both the barrel and the flash hider are at the edge of tolerance. A millimeter off either one at it would probably have fit just fine.
I’ll keep you all updated…
Suppressors cost less than hearing aids..
- BigDave@SMDW,LLC
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Re: Issue with Silencerco Trfecta flash hider and PWS barrel
This would suck if you had paid your own money for it… Probably didn't help too much with accuracy if I had to guess either.Pman5KMO wrote:Too bad you didn't have another barrel of the same make/model to test as well... because sometimes even colt produces lemons like the first brand new M4A1 I was issued in the army that was cross threaded from colt.dan9591 wrote:I appreciate it Andrew, but I literally just shipped it off to PWS.
I went back to the gunsmith and on PWS’s suggestion, we tried mounting the flash hider on a tap and it went on a fine, but you can really tell the difference between a standard birdcage and the Trifecta. It’s almost like the Trifecta’s grooves are not machined as deep as other flash hiders, which is not a bad thing until you run across a barrel with the same issue.
I think Dave really hit it on the head when he mentioned that both the barrel and the flash hider are at the edge of tolerance. A millimeter off either one at it would probably have fit just fine.
I’ll keep you all updated…
Dave
http://www.libertycans.net
Dean of "LSU" Liberty Suppressors Underground
Dean of "LSU" Liberty Suppressors Underground
Re: Issue with Silencerco Trfecta flash hider and PWS barrel
Bump.
Any update?
Any update?