I grabbed the wrong Trumpeter AR15/M16/M4 family set today at the hobby shop. I bought the M16A2 set (6 rifles) and want to trade it for any other set that isn't one of the M16s (M16A1, M16A2, M16A4) instead I want a set from the M4 or AR15 Family.
Drawing of the M16A2s in my set :

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Evan