Don't know about the "AW", but the basic differences in the current production models are as follows:
336A
Walnut finished cut-checkered hardwood with pistol grip.
Blued steel fore-end cap.
Swivel studs.
Hard rubber butt plate.
Screw-adjustable open rear, brass bead front sight with Wide-Scan hood.
336C
American black walnut pistol grip stock with fluted comb and cut checkering.
Blued steel barrel band with integral swivel stud.
Rubber rifle butt pad.
Adjustable semi-buckhorn folding rear, ramp front sight with brass bead and Wide-Scan hood.
336W
Walnut finished cut-checkered hardwood with pistol grip.
Blued steel barrel band with integral swivel.
Hard rubber butt plate.
Padded nylon sling.
Gold-plated steel trigger.
Screw-adjustable open rear, brass bead front sight with Wide-Scan hood.
336A
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336C
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336W
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