If you've ever stared at a parts list trying to decide between a 7", 9", 12", or 15" handguard, you already know the question isn't just cosmetic. Handguard length affects how your AR-15 balances, how it mounts accessories, how it handles heat, and even how it performs with a suppressor. So does AR handguard length actually matter? Short answer: yes — and the "right" length depends entirely on how you plan to use the rifle. This guide breaks down exactly what changes when you go longer or …