In regards to my latest comment
here, is it safe to say that those early images (specifically
this,
this, and the other similar ones) are just conceptual/promotional photoshops? (which brings the question of whether these exact handguards and stocks were even made or not). The SIG folks have been doing some 'shop jobs (sometimes poor ones) on later images at least, and heck, they even chose to 'shop the newer stock into the older images in
that video.