I have the standard carbine https://www.google.co.uk/search?q=carbine+crane+stock&rlz=1C1SVED_enGB533GB533&espv=2&source=lnms&tbm=isch&sa=X&ei=IPKuU8P9O4PfOJ32gYgF&ved=0CAYQ_AUoAQ&biw=1366&bih=643#q=carbine+handguard&tbm=isch&facrc=_&imgrc=-iJY7H0PiqVUZM%3A;mgTWYpfX09oJaM;http%3A%2F%2Fwww.brownells.com%2Fuserdocs%2Fskus%2Fp_100004513_1.jpg;http%3A%2F%2Fwww.brownells.com%2Fitems%2Far-15-carbine-handguard.aspx;400;400 Apparently the holes can...
You'll have to get an ris system on the front or a rail to fit on the handguard for the AFG to mount onto.