I keep reading that the Sig 556 (or the entire 550 series?) is a combination of the AR-15 platform and the AK-47. The main reason given is usually that an AK bolt looks just like a 556 bolt -- and the similarities appear to stop there.
Yes, they're both piston driven, but the AK is long stroke and the Sig is short stroke. And the recoil springs are in different places.
And why is the Sig similar to an AR? Just because it uses a short stroke piston? Because it uses AR mags? Or because they both use a rotating bolt?
Just how meaningful is it that the AK bolt is similar to the Sig bolt? Is something about an AK bolt inherently durable?
Help me out here. How and why is a Sig 556 the lovechild of an AK and an AR?
Yes, they're both piston driven, but the AK is long stroke and the Sig is short stroke. And the recoil springs are in different places.
And why is the Sig similar to an AR? Just because it uses a short stroke piston? Because it uses AR mags? Or because they both use a rotating bolt?
Just how meaningful is it that the AK bolt is similar to the Sig bolt? Is something about an AK bolt inherently durable?
Help me out here. How and why is a Sig 556 the lovechild of an AK and an AR?