sig 522 conversion?

[tshaw]

anyway to make it shoot 5.56/.223 ?

[bdavison]

nope...sorry.

And its highly unlikely that there ever will be.

For one, .223 needs a gas or piston system...which the sig 522 doesnt have.

Also, the ejection port isnt big enough and would have to be enlarged, a whole other bolt system would have to be designed with locking lugs to the barrel...and thats assuming that the gun could handle that kind of charge.

If you want a dual caliber gun, you'd be better off going with a AR chambered for .223, and then get a CMMG .22 conversion bolt for it.