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12/5/2020 9:49:42 AM EDT
Is there a source for Sig 55x mags? I have a 551A1 I bought years ago. I have some, but I would like to get some more mags for it. Haven’t had any luck at all finding any. Kinda wishing I had bought more from Sig back in the day.

Or otherwise, has anyone found a mag suitable to convert?
12/5/2020 6:01:19 PM EDT
[#1]
As far as I know there are no other alternatives, tough to find under 70 bucks a piece. I lucked out a couple years ago and a LGS had a Sig section and behind the 522 mags
were 30 round 5.56 mags, bought all 4. Gunbroker isn't going to be any better than any other place you may find them, I have noticed they come in spurts, so you may
luck out and get some in the 60 dollar range. Post WTB on EE, maybe someone got rid of their rifle and has some mags still.
12/6/2020 6:51:28 AM EDT
[#2]
Your best bet would be to place a back order with JDI for mags at $65 each for the 20 & 30 round mags and wait for them to show up...
It would be nice if Magpul would start making SIG-550 mags...
12/6/2020 12:44:20 PM EDT
[#3]
I did see West Coast Armory has some 30s, 80 some bucks a piece though.
12/6/2020 1:41:20 PM EDT
[#4]
Pony up and pay for whatever you can find in stock. There is a guy out of Canada who offers a kit to use AR mags in the Swiss mag lower. It consists of an adapter that is installed on the lower receiver’s lip for the magazine’s front locking lug, and a Jig to cut the interface for the magazine catch. But, I don’t believe the kit will work with the 551a1 aluminum lower.


https://www.gunbroker.com/item/881344504
12/6/2020 8:34:24 PM EDT
[#5]
Can Galil Mags be made to fit?

They do fit the Sig 556R - but not sure how much different the 550 series is - Lots of Galil mags out there right now.
12/6/2020 9:23:25 PM EDT
[#6]
Quote History
Quoted:
Can Galil Mags be made to fit?

They do fit the Sig 556R - but not sure how much different the 550 series is - Lots of Galil mags out there right now.
View Quote



Not sure. I’ve never tried. The steel front retaining lug would likely chew up the aluminum lower and would require a steel insert as was done on the 556R lower. One could instead buy a 556R lower to use Galil or 5.56 AK mags.
12/7/2020 10:48:10 PM EDT
[#7]
Quote History
Quoted:
Can Galil Mags be made to fit?

They do fit the Sig 556R - but not sure how much different the 550 series is - Lots of Galil mags out there right now.
View Quote



Hmmm.....I’ll have to try. I have a few polymer galil mags that might just be the ticket if this works.
12/19/2020 9:35:29 PM EDT
[#8]
I picked up a couple of the Pitchfork Systems black SIG-550 mags...
They seem well made and fit my rifle as well as a factory SIG mag...



12/20/2020 12:15:08 AM EDT
[#9]
Quote History
Quoted:
I picked up a couple of the Pitchfork Systems black SIG-550 mags...
They seem well made and fit my rifle as well as a factory SIG mag...

https://i.imgur.com/jjWAID2l.jpg

https://i.imgur.com/PidOU7Tl.jpg
View Quote


I just ordered a couple, thanks for that! How long did they take to ship? Were they in stock or was there a bit of a delay?

That’s a fantastic P556 conversion also.
12/20/2020 12:19:24 AM EDT
[#10]
Quote History
Quoted:


I just ordered a couple, thanks for that! How long did they take to ship? Were they in stock or was there a bit of a delay?

That’s a fantastic P556 conversion also.
View Quote View All Quotes
View All Quotes
Quote History
Quoted:
Quoted:
I picked up a couple of the Pitchfork Systems black SIG-550 mags...
They seem well made and fit my rifle as well as a factory SIG mag...

https://i.imgur.com/jjWAID2l.jpg

https://i.imgur.com/PidOU7Tl.jpg


I just ordered a couple, thanks for that! How long did they take to ship? Were they in stock or was there a bit of a delay?

That’s a fantastic P556 conversion also.


From where are you ordering them?
12/20/2020 1:07:58 AM EDT
[#11]
Hmmm....my searching abilities are failing me. Got a link?
12/20/2020 4:11:37 AM EDT
[#12]
Preston precision

I’ve never even heard of them but they seem to be the US dealer for these, everything else was in Switzerland.
Has to be better than gunbroker! They are about the same price as factory at JDI but are hopefully actually in stock and I wanted to see if they were any better material or at least comparable to factory. Generally the tabs are more annoying than useful as well so some mags without that feature are welcome.
12/20/2020 7:25:00 AM EDT
[#13]
Quote History
Quoted:


I just ordered a couple, thanks for that! How long did they take to ship? Were they in stock or was there a bit of a delay?

That’s a fantastic P556 conversion also.
View Quote


I ordered mine 12/15/20 and had them by 12/18/20 from Tuscon AZ to Nowhere MN...
Our mail has been running well other parts of the country sounds like a cluster fu*k with Christmas packages...
Here's another link to some info on the mags hope it come through translated...
Mag info...
12/20/2020 4:25:14 PM EDT
[#14]
Those Preston Precision mags are the same as have been sold for awhile up in Canada. The rumor was that molds were made somewhere in Asia. The mags are an identical copy of the Swiss in my limited experience (three or four).
12/30/2020 10:33:43 AM EDT
[#15]
I'd try the preston mags but at that price point id rather just get a swiss mag. Maybe we should just beg/please pro-mag to give it a whack. I'd buy dozens easy at $20 a pop even if it had the occasional issue for range use.
1/12/2021 12:30:41 PM EDT
[#16]
@mace2364

I may have a bunch of 55x mags and accessories to sell if the deal on my 551A1 goes thru. They only want the rifle.
1/12/2021 9:40:52 PM EDT
[#17]
Quote History
Quoted:


I ordered mine 12/15/20 and had them by 12/18/20 from Tuscon AZ to Nowhere MN...
Our mail has been running well other parts of the country sounds like a cluster fu*k with Christmas packages...
Here's another link to some info on the mags hope it come through translated...
Mag info...
View Quote



From the link:

The magazine bears the company name Dominion Defense. But if you want to know a little more about the company, you have to dig a little. If you enter Dominion Defense in google, the first result is:

Dominion Defending s e exists in Virginia, USA, as a Dominion Defense LLC, founded in 2013. Although there is a domain, but the site is under construction. What remains is the Facebook profile . According to this, they specialize in reloading supplies such as cases and components. But, if you go through their chronicle, you will also find an AR15 Lower. However, no magazine clones, and if so, then more likely on an AR basis.

The second entry leads us to Asia, because an entry on Bloolmberg refers to:

Dominion Defense & Industries Sdn Bhd, Malaysia. Your line of business is apparently marine and defense products, whatever that means. Dominion Defense & Industries Sdn Bhd. is a subsidiary of Boustead Penang Shipyard Sdn Bhd, which in turn belongs to Boustead Heavy Industries Corporation Berhad. The whole survey is here to find. But they don't seem to have any magazine clones in their portfolio.

If you dig a little deeper into Google, Dominion Arms suddenly appears. Here, too, a website is available, but in fact unusable. The Dominion Arms Grizzly Shotgun is well known, and AR magazine clones can also be found in Canadian shops . However, no concrete trace either ...

... until you dig up a Reddit thread linking Dominion Arms with China North Industries, better known as NORINCO . Or, as the Redditers call it; NORINCO with a little selection. This makes the most sense, as NORINCO is a household name in the handguns and handguns world-wide when it comes to weapon clones. NORINCO Kalashnikovs, P226, 1911s, AR-15s and various hunting shotguns are commonplace on the market. Why not the Stgw90? Or magazines for it?

It is therefore quite obvious that the magazine comes from China.
1/12/2021 11:46:07 PM EDT
[#18]
Quote History
Quoted:
@mace2364

I may have a bunch of 55x mags and accessories to sell if the deal on my 551A1 goes thru. They only want the rifle.
View Quote



@Jodi

I may be interested-sending a pm.
2/5/2021 9:28:57 AM EDT
[#19]
A heads up Preston Precision has black no tabs in stock and thats all they are going to get as the maker isnt making anymore according to their website.
2/5/2021 10:42:36 AM EDT
[#20]
For those magazines to have been viable long term, the price would have needed to be significantly below the factory magazines.
2/8/2021 6:36:03 AM EDT
[#21]
Just saw this was bumped. If anyone has new SP5/MP5 magazines, I have a WTT ad on the EE for brand new recent manf Swiss 55x mags.

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