AGP Arms SIG556 Folding Stock

AGP Arms SIG556 Folding Stock

SKU:
AGP-SIG-FOLDINGSTOCK
$140.00
(23 reviews)
Current Stock:
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Description

Here is the AGP push button side folding stock for use on the SIG 556. If your model has the AR style threaded buffer end of the receiver, this kit will fit.  The stock features a removable end cap that allows for storage in the tube section.  You are able to store your proper paperwork, cleaning kit, batteries, etc in this section. 

The kit comes complete with the stock and hinge and all the billet adapters to mate with your lower receiver, anti-rotation plug.

Optional 1/2" or 1" butt pad.

Length of Pull:

No Buttpad - 11.75"

1/2" Buttpad - 12.25"

1" Buttpad - 12.75" 

Will not fit the newer 'Classic' model that had the hinge built into the receiver. If your 556 has a factory folding stock, this product will not work. 

Available in Black

Instructions

Reviews

  • 5
    Was easy to install and has great fit and quality.

    Posted by Happy Customer on 24th Mar 2025

    This is a great product for adding a folding stock to a Sig 556 with the AR15 buffer tube. The quality is great and it was easy to install.

  • 5
    Was easy to install and has great fit and quality.

    Posted by Happy Customer on 23rd Mar 2025

    This is a great product for adding a folding stock to a Sig 556 with the AR15 buffer tube. The quality is great and it was easy to install.

  • 5
    Folding stock

    Posted by Sig 556 swat on 21st Mar 2025

    Perfect fit good quality

  • 4
    good with only 1 flaw

    Posted by Marshall L on 16th Feb 2025

    the stock feels good with the 1/2inch butt pad but my only complaint is there is no way for the folding stock to latch to the side of the gun and so the stock just falls open when closed

  • 5
    sig 556 folding stock

    Posted by robert pardue on 27th Dec 2024

    easy to install, works great and looks great

  • 5
    Sig 556 folding stock

    Posted by Robert Knight on 31st Jul 2024

    Very easy to install and mounts very solidly. No wiggle or movement once installed. It looks really good too! I'm glad I bought it.

  • 5
    AGP Arms Sig 556 Folding Stock

    Posted by Bruce Taylor on 6th Feb 2024

    Great product, good quality and perfectly matched to the Sig P556. Very impressed with the build quality and timeliness of the transaction.

  • 5
    Very solid. Close to original.

    Posted by Mckenzie on 20th Jan 2024

    Stock is well made, install takes 5 minutes. Feels close to the 552 european folder in length and overall shouldering. Locks firmly in place. No walk or talk at all. Solid! Definately get it with a larger pad. These rifles all have a tight shouldering as is, but it is still a bit short for my stance. Adding a veritcal grip to the handguard does help for anyone experiencing this. The stock folded does not go far enough to lock up on the handguard "nub" on operators right side. I think the proprietary sig ones do, but it is not a dealbrwaker for me. At this price 5 stars. Fast processing and shipping. Would reccomend.

  • 4
    Sig 556 folding stock

    Posted by PB on 19th Nov 2023

    Great snug fit and very easy to install. Would recommend!