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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; ... good job ... it looks like you can tighten the flash-hider just about another few mm ... (looking at the picture it appears there ...


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Old 04-05-2017, 06:11 PM   #16
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... good job ... it looks like you can tighten the flash-hider just about another few mm ... (looking at the picture it appears there is still a little space to "crush" the washer a little bit ...
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Old 04-05-2017, 06:29 PM   #17
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I will try 8n the morning. Is there a torque, besides the torque for other piece?. Directions dont say
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Old 04-05-2017, 07:41 PM   #18
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Nope ... no torque ... once you screw the flash-hider portion hand tight onto the QD, you should have approx 1 1/2 full revolution to time it correctly.


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Old 04-06-2017, 04:23 AM   #19
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Nope ... no torque ... once you screw the flash-hider portion hand tight onto the QD, you should have approx 1 1/2 full revolution to time it correctly.


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So tighten it by hand, then turn it to time it.. Got it.
I am going to get some more crush washers too, any idea what size before I call Sig, as I will be doing another one on the 300Blk rifle, and I crushed it already too far. I dont want to loosen it and re tighten.

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Old 04-06-2017, 04:34 AM   #20
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Put Flash hider adapter for SRD762 QD on 516

Call SIG and request new ones from them unless your GS has some of the SAME material


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Last edited by electricjet; 04-06-2017 at 05:45 AM.
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Old 04-06-2017, 04:46 AM   #21
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Call SIG and request new ons from them unless your GS has some of the SAME material


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Sig is sending me a few extras as a courtesy. I guess being registered with them is good.
I did take the flash off and the crush washer looked like it did prior to putting it on. So, for training purposes, I tightened it and then timed it. Not going to shoot it till new crush washers come. Seems like it isnt real tight. You would think it would loosen up after use..
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Old 04-06-2017, 05:47 AM   #22
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I just messed with my FH .. since I had a couple of crush washers ... once hand tight you have a lot of "wiggle room" to adjust/time ... be brave - be bold


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Old 04-17-2017, 07:36 PM   #23
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Ok. Did the crush washer thing. It will not time correctly. Once i put it on till it touches crush washer I hand tighten, then I try to tighten it with wrenches to time flap at 6 O'clock. Wont frickin budge. So, took it off, and without washer it bottoms out exactly same spot where I cant move it. So, i took two used crush washers, same thing, its bottoming out into brake adapter..
Now, I can time this by hand, maybe comes out to 10 to 15ft/lbs torque, like Sig said at CS and a video on youtube, and they said it wont come off.
Thoughts
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Old 04-17-2017, 07:47 PM   #24
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I used the Precision Armament Accu-Washers on mine and they worked great.
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Old 04-18-2017, 03:16 AM   #25
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I used the Precision Armament Accu-Washers on mine and they worked great.
The instructions show no washer on barrel side, as the brake adapter on Sig barrels is tapered, so that is how they mount. The flash hider goes into the brake mount using a super thin copper crush washer. see attached picture of already used one next to penny. I dont know if I am doing something wrong, Silencershop and Sig say it goes on hand tight to time. I cant believe a crush washer can put enough tension on it to stay.
I may take it to the my gunsmith and ask him..
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File Type: jpg Crush washer.jpg (875.3 KB, 8 views)
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Old 04-18-2017, 04:10 AM   #26
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I see. The gunsmith may be the best option then.
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Old 04-18-2017, 05:57 AM   #27
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Went to range, and after 30 rounds it backed off. At gunsmiths now.
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Old 04-18-2017, 06:56 AM   #28
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Gunsmith has done a few of these. One he hard timed the brake with a standard AR crush washer, then put the flash on to time it. So, we did measurements, and the flash hider was bottoming out on the inside shoulder. Barely. So, we put a flat thin copper washer, and a new crush washer, and a little Rocksett, and torqued it to 20ft/lbs and timed. So, that is my solution for the time being. Hopefully it will work
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Old 04-18-2017, 04:16 PM   #29
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Glad you figured it out. Keep us posted on performance.
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Old 04-18-2017, 04:50 PM   #30
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Glad you figured it out. Keep us posted on performance.
I am going to take it shooting on Thursday.. I guess we shall she how bad arse this Rocksett is...
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