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Discussion Starter · #1 ·
I am trying to decide which way to go with my 556 SBR project and was curious what vendors may carry 552 series lowers? I cant decide weather to take a 556 Classic out of my inventory and part it out for the lower to place the 552 buttstock on or do the whole lower thing which is all Swiss.
 

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Depends on how much you want to spend?

Using your lower would definitely be cheaper, only the cost of the new stock. The real SIG SAN lower would be more accurate. If I could afford the SIG SAN lower that would be my choice, but also keep in mind the cost of mags for a new style lower. CO Gunsales has all that you need in stock, VERY VERY expensive stuff, but if you have the money. Good luck and post photos after you get your approval from the BATF.

PS My latest approval took almost seven (7) months.
 

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Discussion Starter · #3 ·
Thx for the input. I currently have my 556 pistol SBRed and approved but thought I would change out the lower to be able to use the "real" 55X stock.
 

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clubster said:
Thx for the input. I currently have my 556 pistol SBRed and approved but thought I would change out the lower to be able to use the "real" 55X stock.
The cost of a 550/551 lower and Swiss magazines is not worth the cost for just wanting a 550/551 type stock.

You could buy a Classic 556 lower to accept a Swiss folder for less than the Swiss lower switch-out plus cost for additional Swiss magazines.

Besides, the feedback from the field is not favorable for the Swiss Mags:
Can't comment on the Sig 556, but have used Sig 552 Commando for about a year on PSD.

We received the weapons new and mine was zeroed straight out of the box. I think I had to adjust the iron sights once over the course of a year.
Sig 552 was very accurate out to 300m (although fore-sight at that distance obscures Brit Fig 11 Target - Lolly Popping required).
Weapon was very reliable with every nature of 5.56 that we put through it.

Only dramas were the plastic mags, which were sh1t: kept breaking on the 'lips'.
Also we found excessive wear on the weapon's gas plugs, although I never saw this lead to a malfunction.
A few of the tritium inserts in the foresights fell out as well. Bit poor.

If (as google suggests) Sig 556 uses M4 mags you should be onto a winner....

Source

 

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Discussion Starter · #5 ·
Good avice but for what that vendor wants for a lower I most likely will just buy a complete gun and part it out. Just out of of principal! I think I

Well the more I actually think about it I am going to go that route with the 556 classic lower. After all at the end of the day the 556 still is not a 55X so i guess quite pretending right:). Happy Shooting!
 

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clubster said:
Good avice but for what that vendor wants for a lower I most likely will just buy a complete gun and part it out. Just out of of principal! I think I

Well the more I actually think about it I am going to go that route with the 556 classic lower. After all at the end of the day the 556 still is not a 55X so i guess quite pretending right:). Happy Shooting!
I am in the process of doing the same thing, but am having a hard time not wanting to save up for the swiss lower from cogunsales.

then again, I can more readily afford the 556classic lower then buy the 550 stock set from cogunsales, and have a great look to my p556.

there is another provider of 552 style accessories for your 556, mfiap.com is a good source for making your 556 look like a 552. I dont mind pretending, because I have to. ;)
 
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