Academy's policy is they do not sell "Assault" style weapons to anyone under 21. AR-15's, SIG-556, etc (I wonder how they treat the R-15 and R-25 since they are marketed as hunting rifles...shit I work there and am not sure) are unfortunately are included in that category. They will also not sell the Mossberg 500 that comes with the pistol grip(the Persuader) to anyone under 21 either. Nor the modified tacticool Remington 597 to make it look like a quasi AR. Part of Academies issue is they have some corporate policies that go above and beyond Federal law.