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Yes, basically all the stamped serial numbers (bolt, bolt carrier, magazine, receiver, stock, trigger group, and rear of the receiver cover). The EP'd numbers are useful too (extractor, gas piston, gas tube, sometimes the bayonet).
Then some detail shots of the right side of the bolt carrier, the rear receiver cover takedown lever, gas tube takedown lever, the barrel lug, bayonet lug, gas block, and left/right stock @ the crossbolts would likely get us there.
Between the two we would be able to compare fonts, look for odd should't-be-there features, and give you as good an opinion as photos would allow.