SIG Addict got hold of a photo of SIG SAUER’s upcoming SIG 556xi modular rifle that will be available in 5.56x45mm, 7.62x39mm, and .300 AAC BLK. The barrels and bolts will be swappable between calibers. According to SIG Addict they can accept AK and AR magazines (how this is achieved is not specified). The models available will be …

SIG 556xi – Standard model, comes with standard side-folding stock (with removable cheek pad)

SIG 556xi Carbon – Enhanced model, comes with carbon fiber quad rail, and skeletonized side-folding stock

SIG 556xi Russian – Similar to standard model but chambered in 7.62x39mm Russian only, comes with standard side-folding stock (with removable cheek pad)

SIG P556xi – Pistol model, comes with quad rail and SB15 forearm brace