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Put Flash hider adapter for SRD762 QD on 516

This is a discussion on Put Flash hider adapter for SRD762 QD on 516 within the SIG Sauer Rifles forums, part of the SIG Sauer Forum category; Put it on. But the flash portion , as its two pieces,needs to be tightened. Sugģestions?...


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Old 04-04-2017, 09:41 AM   #1
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Put Flash hider adapter for SRD762 QD on 516

Put it on. But the flash portion , as its two pieces,needs to be tightened. Sugģestions?
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Old 04-04-2017, 10:58 AM   #2
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Don't use an AR crush washer, you need to thread the mount on so that the back mates up directly to the shoulder behind the threads. Clean the rifle and mount threads, apply the Rocksett that came with the mount, and torque it down.

The flash hider itself is what gets the crush washer (that came with the mount), just put the washer on the flash hider threads, and tighten down till the flash hider is either bottomed out, or timed to your preference.

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Old 04-04-2017, 11:12 AM   #3
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I really like to hold the barrel with a strap wrench right up next to the flash hider. Makes torquing down quite easy with little to no risk of damaging/marring the barrel.
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Old 04-04-2017, 11:16 AM   #4
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greetings ... attached a copy of the manual which came with the flash-hider QD's ...
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Old 04-04-2017, 12:24 PM   #5
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Quote:
Originally Posted by electricjet View Post
greetings ... attached a copy of the manual which came with the flash-hider QD's ...
I think it may be on wrong then. The super thin washer goes inside for the flash, but look at my barrel, and it looks like the AR15 crush washer was put on.
I had a gunsmith do this..
Still, I should have gotten instructions.
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Old 04-05-2017, 11:11 AM   #6
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Update

Re Installed to Sigs directions.
The armorer stated he did do it the other way do to other Sig people not liking the fact it buts right up to barrel without a washer to protect barrel, and that they (the customers) didnt think the muzzle adapter would be tight enough with just roxcet. They felt the tapered parts didnt fully seat. He as a man of business, will do what the customer wants.
Anyways, would be interesting to see the measurements if the tapered part of break, and barrel taper of barrel mate up to properly secure the adapter.
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Old 04-05-2017, 11:13 AM   #7
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I will put CQB flash hider on later, once I see how to tighten it. Heard there is a tool that fits in there.
Will this work. there are no flats etc on the flash hider to use to tighten. Sig customer service told me to use an armorers wrench.. I said thanks, and moved on.
https://www.midwayusa.com/product/87...ck-to-top-link

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Old 04-05-2017, 03:30 PM   #8
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Put Flash hider adapter for SRD762 QD on 516

@ Steve40th ... STOP .. Do not spend money on that "tool" => buy ammo instead!

IF YOUR GS HAS NOT TORQUED THE QD BASE TO THE BARREL DO THIS:
go to Lowes and get a "crow-foot" 3/4" open-end wrench which you will use with a torque wrench to torque your QD base onto the barrel. => ONLY to 20-30 ft/lb torque.

Insert the crush washer as depicted in the posted instructions, tighten by hand, then use a 7/8" open-end wrench (see picture 2) to "time" your flash-hider to the correct position (see picture 3).
Use the 3/4" wrench to hold the QD base in place. (see picture 1)
If in doubt read the previously posted instruction again

You want the flat portion of any of the 3 prongs perpendicular with the ground to prevent dust/debris to be kicked up.

IF YOU ARE OCD USE A LITTLE PAINTERS TAPE ON THE WRENCH FACES SO YOU WONT SCRATCH THE QD OR FLASH HIDER
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Last edited by electricjet; 04-05-2017 at 04:13 PM.
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Old 04-05-2017, 04:04 PM   #9
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I am assuming you have a SIG STD762TI-QD silencer - right?
A WORD OF CAUTION: as with any silencer MAKE SURE (especially with this particular model) that it is FULLY "twisted" onto the base. This model with the "nifty" press button/latch likes to catch the coarse thread and fool you into thinking it is all the way on => to avoid this and a possible baffle strike, depress the latch until you have a firm/positive resistance against the QD angled face.


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Old 04-05-2017, 04:10 PM   #10
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Quote:
Originally Posted by electricjet View Post
@ Steve40th ... STOP .. Do not spend money on that "tool" => buy ammo instead!

IF YOUR GS HAS NOT TORQUED THE QD BASE TO THE BARREL DO THIS:
go to Lowes and get a "crow-foot" 3/4" open-end wrench which you will use with a torque wrench to torque your QD base onto the barrel. => ONLY to 20-30 ft/lb torque.

Insert the crush washer as depicted in the posted instructions and use a 7/8" open-end wrench (see picture 2) to "time" your flash-hider to the correct position (see picture 3). Use the 3/4" wrench to hold the QD base in place. (see picture 1)

You want the flat portion of any of the 3 prongs perpendicular with the ground to prevent dust/debris to be kicked up.

IF YOU ARE OCD USE A LITTLE PAINTERS TAPE ON THE WRENCH FACES SO YOU WONT SCRATCH THE QD OR FLASH HIDER
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Thanks. I didnt think a wrench would fit. Going to check in a few minutes.
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Old 04-05-2017, 04:11 PM   #11
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Quote:
Originally Posted by electricjet View Post
I am assuming you have a SIG STD762TI-QD silencer - right?
A WORD OF CAUTION: as with any silencer MAKE SURE (especially with this particular model) that it is FULLY "twisted" onto the base. This model with the "nifty" press button/latch likes to catch the coarse thread and fool you into thinking it is all the way on => to avoid this and a possible baffle strike, depress the latch until you have a firm/positive resistance against the QD angled face.


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Yes, that is the suppressor, but not in Ti.
Thankx
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Old 04-05-2017, 04:16 PM   #12
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... done yet ...


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Old 04-05-2017, 04:19 PM   #13
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... done yet ...


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7/8 6 point perfect. But no roxcet..
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Old 04-05-2017, 04:21 PM   #14
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... and you know ... pictures or it did not happen


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Old 04-05-2017, 04:35 PM   #15
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Best I could do on timing.
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