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SIG716 Patrol teardown (lotsa pix and info)

28K views 39 replies 10 participants last post by  Edsel 
#1 · (Edited)
NOTE: if you're reading this sentence, I'm still working on it. I'll delete this note once it's all done. Lots of stuff to sort out so please pardon the mess.
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INTRO: This is the Sig Sauer SIG716(TM) Patrol rifle teardown. I'm always learning so if you have a correction or suggestion on how to do something better, please share so everyone could benefit.

This is what I learned from speaking to various people, including my dealer and Sig representatives. Some of the techniques I use may or may not be ideal or even correct. Please provide your comments where relevant.

Manufacturer's link: SIG716 Patrol

Manufacturer's link to all available owner's manuals: SIG SAUER

Direct hotlink to SIG716(TM) manual: http://www.sigsauer.com/upFiles/CmsContent/documents/SIG716_MiniManual_1800058REV01_LR.pdf

Picture taken by my dealer, recently deceased Jaymie ("gabby") of the now defunct Afton Arms company, RIP:


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SAFETY:

Before handling firearms, I always remove the magazine and clear any round that may be chambered. You can clearly see the gun lock indicating a safe state.


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INVENTORY LIST

This is everything my dealer gave me. He traveled over 100 miles to bring me this so some of the packaging was thrown out to reduce his load. Understandable.



He was kind enough to provide me with a 40" soft case.

Going from left to right you see the item tag, Sig owner's manual, 2 allen hex keys, Ergo Grips, the rifle itself, Mappul MIAD grip and components (optional front strap, 5.56/.223 3 round holder insert for grip which I removed because it's useless for the 7.62x51/.308, normally it's mounted inside the grip, 2 optional rear strap inserts, a rollpin to lock in the rear strap if you so choose), Magpul ACS butt stock with ambidextrous sling mount and 2 5.56 dummy rounds, Magpul PMAG, and 2-point sling.

Link for the Magpul products that come standard with the rifle:

http://store.magpul.com/product/MAG243/PMAG
http://store.magpul.com/product/MAG050/39
http://store.magpul.com/product/MAG370/87

My rifle also comes with the optional AAC Blackout: http://advanced-armament.com/BLACKOUT-Non-Mount-Flash-Hider-762mm_p_450.html

For posterity, a comparison with the .308 round with the dummy 5.56 rounds.


Another view of the right side:



First impression is that the rifle has some heft. Those who are used to the lighter 5.56 rifles will find the SIG716 noticeably heavier. I really feel for folks who have to lug the SAWS around.

It's not unmanageable though. The gun just feels very tight and hefty but very wieldy running around.

On my extremely accurate bathroom scale:


It shows approximately 10.5 pounds empty. Pretty close to Sig specs.


Left side showing the slide release, ambidextrous mag release, familiar thumb safety, and rear sling mount.



Right side showing the dust cover, ambidextrous mag release, rear sling mount, and trigger guard removal. Push the detent spring and the trigger guard should swing out for gloved operation.



Horrible pix but it shows the gas valve, bayonet mount, and front sling mount.



Same view from left side showing front sling mount and better view of bayonet mount.



The front sight is the "A2" style with four indents.



I was quite disappointed that Sig does not include a front sight tool. I procured one fom the local gun shop.




This guy takes way better pictures than I do. Please pardon the external link. He also does do a fairly good job of reviewing all the features as well: http://www.thetruthaboutguns.com/2012/10/melvin-johnson/gun-review-sig-sauer-716-patrol-rifle/
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Now that the formality is over, I'll get right to the point. The owner's manual was written before the design was finalised for production. A Sig representative confirmed this with me: http://www.sigsauer.com/CustomerService/

These are the differences I noticed:

1. The parts diagram shows a firing pin spring; however, the actual rifle does not have a firing pin spring. I saw a couple of other users with the same situation. The Sig rep confirmed with me that the firing pin spring was eliminated from the final design because the engineer felt it added no benefit.

2. The manual states that you should be able to freely turn the gas valve from position #1 Normal to position #2 Adverse; however, the actual rifle requires depressing the detent pin to make any change to the gas valve position. The Sig rep confirmed with me that the gas valve design was changed at the last minute to require pushing the detent pin to make any change to the gas valve position. This change was unfortunately not updated in the manual.

I'll cover these changes in more details below.

I also saw some concern about removing the quad rail for cleaning. The Sig rep's suggestion is that under "normal" use, removing the quad rail is not required for cleaning; however, it is recommended that once every 5-6 cleaning should involve removing the quad rail for cleaning and inspection.

Of course if your rifle is operated in extremely dirty conditions, then you should remove the quad rail for cleaning and inspection.

I'm not going to cover removing the quad rail this time. Maybe in a future update I will.


For the most part the manual does a very good job of explaining all the various features. I'll try to supplement the owner's manual with information that I think is helpful in the order presented in the manual.
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BUTT STOCK

To remove the buttstock, the manual instructs to fully extend the butt stock. While holding the adjustment lever, insert the dummy round into a pinhole and extend the locking pin release towards the bottom of the rifle.



I found that the spring is too stiff and was bending the tips of the dummy rounds. So instead I used a small screwdriver to carefully pry on the locking pin.



Then carefully pull back on the butt stock while prying the locking pin towards the bottom of the gun. The butt stock should come out.





There's some confusion between Mil Spec and Commercial Spec on the SIG716. So I brought the rifle to an authorised Magpul dealer and he confirmed that the SIG716 accept Mil Spec butt stocks.

Please note that the Magpul CTR butt stock was installed for illustrative purposes only to demonstrate the size. It's up to the end user to keep the factory butt stock or to select another one.


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FIELD STRIP

After racking the bolt and let it lock forward, put the safety on SAFE. The manual suggests using the dummy round to push out the take downs, but I found it very easy to push/pull using just my fingers. Push the take down pins from left to right of the rifle.



The very first thing I noticed is that the rear takedown pin has a tensioning plunger. Perhaps that's why the gun feels so tight and not loose.

 
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#40 ·
Sunday Slacking...
 
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