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  1. Technical Discussions & Troubleshooting
    Hi all, I am new to the forums, but have been the owner of a 556 since I purchased a 1st-gen rifle back in 2007. To be clear, this means the original version of the rifle with fish gill grips and adjustable (NOT folding) stock. So far, I've kept all of the factory equipment on the gun (I know...
  2. Non-FFL
    SIG SAUER threaded stock adapter gives shooters the ability to install a AR style stock with buffer tube on your 556 rifle/pistol. These are about $90 with shipping from Sig, this adapter has never been installed while fired, like new condition, will also include end plate. Make me an offer...
  3. Uppers, Lowers, Barrels and Parts
    i am looking for a sig 556xi folding stock for mr rifle, bought it from a buddy with an m4 adapter and would like the original look!
  4. Uppers, Lowers, Barrels and Parts
    Has anyone tried mounting one of the telescoping PDW stocks on a SIG556? Sig sells the 1913 stock mount base plate on their website now, so if the telescoping arms are wide enough to get around the upper receiver, it should technically work... Even if it doesn't, the MCX skeleton stock should...
1-5 of 5 Results