Cramer's lightning round: Buy Howmet Aerospace

* Cramer reviews five stocks: AVAV, RKT, MP, HWM, ATAI * He gives cautious or negative views on AVAV, RKT, MP, ATAI * He recommends holding or buying HWM as best aerospace play Cramer's lightning round on AVAV, RKT, MP, HWM, ATAI: AVAV "not yet" due to strong niche competition. RKT he won't double-down after past mistakes. MP "makes sense" but no near-term catalyst. HWM "hold or buy" as the cleanest aerospace pick. ATAI lacks enough upside for a speculative bet.