Smyth Busters: A Heavy Caliber AR-15 Requires a Heavier Buffer
This guide, presented by Brownells experts Caleb and Steve, debunks the myth that heavier calibers necessitate heavier buffers in AR-15 platforms. It explains that standard 3-ounce buffers are typically sufficient for calibers like 450 Bushmaster and 300 Blackout, as gas port calibration is the primary factor for cycling. Heavier buffers are primarily for tuning recoil or specific operating systems like blowback.













