I do not think those rifles have any US parts at all. The attached post indicates they were modified to exclude adding a pistol grip. nit sure exactly what that nmod is ior how simple to overcome. You can enlarge the mag well for high cap mags. You will need 5 US parts. Fire control group (3) pistol grip (1) if you can figure out how to mount it? and US magazine floorplate and/or follower (2) or all US furniture (3).
http://www.gunsnet.net/linx310/model.htm#992
Here is a 922r worksheet you can fill out to see what you need to be compliant.
http://thegunwiki.com/Gunwiki/BuildAkVerifyCompliance
http://www.gunsnet.net/linx310/model.htm#992
Here is a 922r worksheet you can fill out to see what you need to be compliant.
http://thegunwiki.com/Gunwiki/BuildAkVerifyCompliance