I just got an email through PSA that Federal has a 5 cents per round refund on AR ammo. The rebate is good for up to 4,000 rounds purchased ($200 rebate) but must buy a minimum of 100 rounds
https://www.federalpremium.com/downloads/promotions/FP1417_AE5.56and223promo_web_f.pdf
https://www.federalpremium.com/downloads/promotions/FP1417_AE5.56and223promo_web_f.pdf