Estimate likely muzzle velocity ranges by caliber family and barrel-length bucket.
Estimated muzzle velocity
2,650-3,025 fps
Load profile: 62gr (M855)
Range varies by ammo load, chamber, temperature, altitude, and chronograph method.
Longer barrels often retain more velocity, though gains are load-dependent.
These values are normalized estimate ranges by barrel bucket for the selected caliber slug and load profile. They are intended for directional planning only.
Load impact model: each caliber has up to three common loads with one default. The selected load applies a conservative offset to baseline velocity ranges; lighter loads usually trend higher and heavier loads usually trend lower.
| Barrel bucket | Estimated velocity range |
|---|---|
| 10.5 in and under | 2,320-2,695 fps |
| 11.5 to 12.5 in | 2,450-2,825 fps |
| 13.7 to 14.5 in | 2,550-2,925 fps |
| 16 in | 2,650-3,025 fps |
| 18 in and over | 2,740-3,115 fps |
Found an issue or have a feature idea? Submit feedback through our public tracker so we can triage and respond transparently.
Barrel length tradeoffs explained
A neutral guide to how barrel length affects velocity and handling, how profile changes weight and heat management, and how twist rate stabilizes different bullet weights.
How gas-system timing relates to barrel length
A neutral explanation of gas system length tradeoffs, port pressures, and how these design decisions affect reliability, recoil, and parts wear.
Muzzle device behavior by use case
A neutral overview of how flash hiders, compensators, and brakes work, what each is designed to do, and the tradeoffs in recoil, flash, and concussion.
Suppressor-host muzzle device considerations
An examination of muzzle device options for suppressed AR-15s, covering thread pitch standards, mount systems, alignment considerations, and the tradeoffs between direct-thread, QD, and taper-mount interfaces.