Talk:SIG SG 550

Additional Images

SG 551

SIG SG 551 Closeup of side of the receiver - 5.56x45mm

SG 553

SIG SG 553-1 SP with railed handguard - 5.56x45mm

SIG SG 553 R SB with adjustable stock and 4 rail handguard - 7.62x39mm

SIG SG 553 R LB with adjustable stock and 4 rail handguard - 7.62x39mm

SIG556

SIG-Sauer SIG556 Classic with green furniture - 5.56x45mm

SIG-Sauer SIG556 SWAT SBR - 5.56x45mm

SIG-Sauer SIG556 DMR with Magpul PRS stock and Harris bipod - 5.56x45mm

SIG-Sauer SIG556R - 7.62x39mm

SIG-Sauer SIG556xi Russian SWAT - 7.62x39mm

SIG-Sauer SIG556xi Carbon - 5.56x45mm

SIG522

SIG-Sauer SIG522 - .22 LR

Airsoft

Spring JP Air Sports Combat 912A, an airsoft replica of the SIG SG 550

SG 750

SIG SG 750 SAPK with RIS foregrip, Surefire Universal weaponlight, and M68 Aimpoint red dot scope & 3x magnifier - 7.62x51mm NATO

Specifications

(2009 - Present)

• Type: Battle Rifle

• Caliber: 7.62x51mm NATO

• Weight: 8.0 lbs (3.63 kg)

• Length: 37.8 in (96 cm)

• Barrel length: 18 in (45.5 cm)

• Capacity: 20-round magazine

• Fire Modes: Safe/Semi-Auto/Burst/Full-Auto

• Moved here because the only thing it appears in has been deleted. Evil Tim (talk) 21:59, 16 November 2017 (EST)

Discussion

talk:image

The top image looks like a 552, with the round bar charging handle, instead of a 553, which has a charging handle shaped like the one found on the 550/551. Dover500 19:38, 31 August 2011 (CDT)

Err, drat! I can't find any other images of a 553. D: - Mr. Wolf 23:38, 31 August 2011 (CDT)

The Easier way to tell is that the 552 has fixed iron sights and a removable rail (locks into a lug at the front of the reciever, and a bolt extends into the rear sight), whereas the 552 has a fixed rail that conceals folding sights. Oddly the above picture is the one used on the Swiss Arms website for the 553, so someone there dosen't know the difference either. --commando552 04:08, 1 September 2011 (CDT)

I did think the top one looked funny. :\ - Mr. Wolf 18:21, 3 September 2011 (CDT)

I can't believe it took me so long to notice, but neither of these weapons are actually the SG 553. One way to tell is that the 553 is also fitted with a Brugger & Thomet (same company that makes the rail systems I believe) flash hider that allows for quick mounting of a suppressor. The other much more obvious way to tell is that the gun has SG 552-2 written on the side. I didn't realise this version existed, but apparently it does, and as far as I can tell the SG 552-2 is a flat top version of the 552 with folding BUIS, sa appart from the bolt and flash hider (although that can be switched) is identical to the 553. For example, one can be seen in The Unit before the 553 was released in 2009 (also has the 552 type charging handle). Below is the only non airsoft picture I can find of a 553, which is the semi auto version. --commando552 12:32, 21 September 2011 (CDT)

I'd like to add my 5 cents to this: the designations "-1" and "-2" on the 55x series rifles have nothing to do with the sights. Rather, they refer to the ammunition the gun was designed for. "-1"-rifles are designed for 5.6mm Swiss (known to us as the "Gw Pat 90" or simply "GP90"), while "-2"-rifles are designed for 5.56×45mm NATO. While these two calibers are very similar, GP90 uses a 63gr bullet with a 1:10" barrell twist rate while 5.56×45mm NATO (originally) uses(/d) a 55gr bullet, requiring a 1:7" or 1:9" barrell twist rate. Of course, NATO has since discovered that 55gr is far to light and now (to my knowledge predominantely) uses much heavier bullets (62 to 77gr). In addition, I'd like to note the following on the 552 vs 553 discussion:

- The difference between these two guns is mostly internal (552: gas piston fixed to bolt, main spring behind bolt, 553: separate gas piston, main spring in front of the bolt). Yet, they are still different guns - which is why I'd suggest to list them as such. Rather, long- and short-barrel version should be distinguised (available for 551, 552 and 553). By the way, the 552 ceased production in 2008, the design was - by Swiss standards - faulty. - The flash hiders are not charateristic to the 552 and 553 versions - both the standard Swiss flash hider (as found on the standard issue SIG 550) as well as the Rotex flash hider could/can be ordered for either rifle. For both versions, Brügger&Thomet builds supressors, although it is said that the Rotex versions "fit better". Rotex equipped guns are however known to be VERY loud unsuppressed (and are therefore referred to as "tuning forks" in Switzerland). - Also, both versions could/can be ordered flat-top or with fixed iron sights. --MoustiqueCMD 18.06, 11 May 2014 (CET)

I have a couple of quick points/questions. Firstly, I don't think it is really necessary to add on to pages that it is a short barrel version of the 551/552/553, as the short barrel is the standard version with the LB being the variant (and as far as I know none of these long barrel version have appeared in anything anyway). Also, are you sure that they make a version of the 553 with fixed iron sights, as I have never seen one and to be honest I can't really understand why they would bother. The closest I can find are US "pistol" versions that have fixed sights and label themselves as the 553, but they clearly aren't as they have the 551-A1 lower and I would guess the upper is cobbled from another variant. About the flash hiders you say that you can order either the Rotex or the standard 550 flash hider for the 553, but I do not think that either of these were available on the 552 were they? I think all the 552s had that open pronged flash hider with the tapered back (distinct from the pronged Rotex which is ribbed and has a nut at the back) and this is not used on the current 553, which means that if it appears that is indicative of the earlier 552 is it not? Last thing about the flash hider, on a number of pages you have stated that it has a Rotex flash hider, but it all cases it clearly has the standard 552 one, which isn't a Rotex is it? Or am I misunderstanding what the various flash hiders are called? --commando552 (talk) 18:16, 13 May 2014 (EDT)

Edit: I finally managed to find a pix of a genuine 553 with fixed iron sights, turns out Punjabi SWAT use SG 553 LBs with fixed sights. --commando552 (talk) 18:29, 13 May 2014 (EDT)

BTW, the "XTreme Armor" logo might be the most ridiculous branding I've ever seen on a piece of LE/military equipment. It looks like it belongs on a skateboard or a bag of chips.

--Funkychinaman (talk) 21:15, 13 May 2014 (EDT)

On that: -- short vs barrel version: okay, agreed. Although the difference is profound. -- version of the 553 with fixed iron sights: I guess that was answered before I could upload the scan of the 2009 Swiss arms catalogue. Anyway, on the subject why the bothered: Because the diopter sights are brilliant ;-). -- Flash hiders: I have to admit I misunderstood this. From what I found out, there are four factory flash hiders for the 55x-series: standard, the four-pronged (useless, therefore to my knowledge no longer available), the threed-pronged (replacment for the useless one) and the Rotex one (which makes sense if you want to use a silencer). Note quite certain which version was/is available for which gun - I'll do some more research and update the respective pages accordingly once I find out more. --MoustiqueCMD 17.16, 17 May 2014 (CET)

I unfortunately failed to find out much more about the flash hiders. A 2008 Swiss Arms catalogue I found only mentions the three-pronged one. Famous Swiss gun maker Brügger&Thomet apparently offered shortened versions as well (cut-down 550s, I suppose, which were equipped with Rotex flash hiders. Anyway, I did update the pages I edited accordingly. --MoustiqueCMD 16.24, 25 May 2014 (CET)

SG552/556 uppers

Does anyone know if the uppers for, say, an SG552 and a SG556 pistol are interchangeable? I ask because was looking at the SG553 in Salt, and realised that the upper on it is identical to that of the SG556 SWAT pistol, which has a different front sight and flash hider to the SG553. Furthermore, the gun in Salt has a jet black upper, but the lower is the regualr SIG grey implying that it is built from two different guns. Below is a shot of the gun from the The Specialists Ltd's website, who supplied the guns for this film, and they list it as an SG552, which from the charging handle it definitely isn't. The uppers of the two guns look the same shape, but are there less obvious differences that would make swapping them a no go? Also, would I be correct to assume that a US company would have an easier time fitting a 556 upper to a 550 series lower rather than getting a 553? --commando552 18:01, 10 October 2011 (CDT)

SIG 750

Can anyone find any information on the SIG 750?? --Zackmann08 19:02, 10 February 2012 (CST)

First off, I think it should be "SIG SG 750", same as the other Swiss Arms rifles. I'm not sure if it is in production yet, but have found some figures. It has 3 barrel lengths:

• Standard barrel: 455mm (18in) barrel, total length 960mm, total weight 3.63kg without magazine
• Short barrel: 365mm (14in) barrel, total length 870mm, total weight 3.82kg without magazine
• Long barrel: 520mm (20in barrel), total length 1025mm, total weight 3.96kg without magazine

The magazine holds 20 rounds, weighs 140g unloaded and 480g loaded.

All of this came from here. --commando552 20:18, 10 February 2012 (CST)

Also, SG 750 is the full auto version, SG 751 is the civilian semi auto version. When it was initially designed back in 2005 it seemed to go by either SAPR (Swiss Arms Precision Rifle) for the long barrel version or SAPK (Swiss Arms Precision Kurz?) for the short barrel. I think this distinction has been abandoned and all are now called the SAPR, as there are 5 different barrel lengths available. I think the picture on the main page is of the old version of the SAPK (lower receiver has since changed), but not sure since the barrels are now different lengths. --commando552 04:48, 11 February 2012 (CST)

Here is a new version of SIG 750/751:

SIG SAPR 751 SB assault rifle - 7.62x51mm NATO.

Andrey Karchikyan (talk) 02:47, 27 October 2013 (MSK)

Merc go to gun

Why does it seems this is every gun-for-hire has this gun? And if its not this its a g36 or ak.DRC92 (talk)

Because it's a hell of a weapon. --RedRobinAlpha (talk) 16:47, 23 March 2015 (GMT)

If I had to go into a combat situation or even just serving a high risk search or arrest warrant, I'd want a SIG 552 with a few attachments as my primary. --L.J. Gibbs (talk) 12:59, 23 March 2015 (EDT)

Good choice, a fan of the 551 myself, but I like a longer barrel on my rifles. --RedRobinAlpha (talk) 20:41, 23 March 2015 (GMT)

SG 550 SR

Correct me if I'm wrong but isn't that weapon also named the SSG-550 as well? StanTheMan (talk) 15:09, 9 November 2013 (EST)

New SG560 series

https://www.thefirearmblog.com/blog/first-images-emerge-of-the-sig-sauer-sg56x-family-44815609 --Ultimate94ninja (talk) 19:11, 23 August 2024 (UTC)