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Posted: 4/24/2020 2:15:32 AM EDT
[#1]
My ps90 lists 10.35 and 20.25
TSC Machine did my conversion with me supplying him a gemtech p90 bilug mount(gsl still sells them). Tros does good work but can take forever. Last adapter I ordered from him took 13 months to get. |
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Posted: 4/24/2020 2:15:48 AM EDT
[#2]
In for the answer. I plan to SBR my rifle this year.
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Posted: 4/24/2020 8:48:07 AM EDT
[#3]
Barrel is 10.4”
OAL is 19.1” I’ve never measured mine, but that’s what he said to use as the official numbers. |
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Posted: 4/24/2020 8:54:37 AM EDT
[#4]
Mine has a CMMG barrel and flash hider and my measurements on my form 1 were 10.4 barrel and 19.9 OAL.
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Posted: 4/24/2020 7:34:19 PM EDT
[#5]
My approved Form 1 showed Barrel 10.3 inches and overall 19.75 inches.
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Posted: 4/24/2020 8:19:38 PM EDT
[#6]
Quote HistoryQuoted: Mine has a CMMG barrel and flash hider and my measurements on my form 1 were 10.4 barrel and 19.9 OAL. Those are the specs for the P90, which is what I thought he said he used for the PS90 conversions? I checked his site and he clearly states 10.4” for the barrel, but I can’t find him mentioning OAL. But I found a post of mine from back in 2014 where I said he told me to use 10.4/19.1 on the Form 1. Dunno. ATF will approve anything around those lengths... |
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Posted: 4/24/2020 8:42:46 PM EDT
[#7]
I have an actual TROS built PS90. My form 3 states 10.3 for the barrel. 19.1 overall.
 Attached File Attached File |
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Posted: 4/24/2020 9:23:43 PM EDT
[#8]
Quote HistoryQuoted: Those are the specs for the P90, which is what I thought he said he used for the PS90 conversions? I checked his site and he clearly states 10.4” for the barrel, but I can’t find him mentioning OAL. But I found a post of mine from back in 2014 where I said he told me to use 10.4/19.1 on the Form 1. Dunno. ATF will approve anything around those lengths...  I used the P90 dimensions when I filled out my forms in 2014. By my eyeball my gun doesn't measure -exactly- 19.9"... it is somewhere between 19.8125" and 19.875" depending on how straight you hold the tape. But that easily "rounds up" to 19.9". I also know that the CMMG flash hider is not an exact 1:1 for the FN part, so the FN part being slightly longer wouldn't shock me. I also wonder about the differing muzzle devices, because a PS90 with a threaded adapter is going to be shorter than a PS90 with a flash hider... and the way I figured it you would have to measure it to the length of the installed "cap piece" as that piece is necessary for the function of the gun (unlike a flash hider on an AR). |
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