I have a PS90 SBR. Lately I noticed the muzzle device, in this case an A2 style flash hider, was loose. I can easily unscrew it with my hand so it does work it's way loose during firing.
When I contacted the manufacturer of the SBR, he mentioned that the manual says to torque down the muzzle device to 30 ft./lbs. I re-read the PS90 manual very carefully and could find no such mention.
Does anyone know if 30 ft./lbs. is the correct torque setting? Should it even be torqued at all beyond hand tight?
PS90 Loose Muzzle Device
- panzermk2
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Re: PS90 Loose Muzzle Device
My concern is that he P90/PS90 barrel is SUPPOSED to have play in it.
Who did the work cutting the barrel and/or who supplied the barrel?
Who did the work cutting the barrel and/or who supplied the barrel?
Jay Wolf
Pr. Elite Ammunition
Pr. Elite Ammunition
"Engineers, the oompa-loompas of science!"
Be'ein Tachbulot Yipol Am Veteshua Berov Yoetz
Re: PS90 Loose Muzzle Device
It was TROS; however, the barrel does have play... it's the flash hider that I can unscrew with my hand. Are you supposed to torque down a PS90 flash hider? If so, is 30 ft./lbs. is the correct torque setting?
- panzermk2
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Re: PS90 Loose Muzzle Device
I just wanted to make sure it was not the barrel. YES 30 pounds will work. I would put BLUE loctite on it. That way it will still come off WHEN you want it but not before.
Jay Wolf
Pr. Elite Ammunition
Pr. Elite Ammunition
"Engineers, the oompa-loompas of science!"
Be'ein Tachbulot Yipol Am Veteshua Berov Yoetz
Re: PS90 Loose Muzzle Device
I have your standard torque wrench with a 3/4" socket, but the socket doesn't fit all the way over the flash hider to reach the nut. Is there a special socket one uses, or an alternative method of reaching 30 ft./lbs. I'm not aware of?
- Rapier1772
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Re: PS90 Loose Muzzle Device
Would a deep socket work? I haven't tried it, just asking... Or you could use a crows foot wrench, kind of like these
https://www.harborfreight.com/7-piece-3 ... 94427.html
https://www.harborfreight.com/7-piece-3 ... 94427.html
How to post pics & videos: viewtopic.php?f=3&t=6363
Contrary to popular belief, you CAN fix stupid - it's just illegal.
- panzermk2
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Re: PS90 Loose Muzzle Device
Use a claw foot.
Jay Wolf
Pr. Elite Ammunition
Pr. Elite Ammunition
"Engineers, the oompa-loompas of science!"
Be'ein Tachbulot Yipol Am Veteshua Berov Yoetz
Re: PS90 Loose Muzzle Device
Amazing! Didn't know those existed! Gonna scoop me up a set!
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