Free Tools
Gun Tools & Calculators
Practical, free tools that run right in your browser — for the range, the reloading bench, and the gun-store debate. No login, no nonsense.
Legal & Law
Ballistics
Twist Rate StabilityWill your barrel stabilize that bullet? Compute the Miller stability factor for any twist and load.Recoil CalculatorCompare how hard two loads kick — free recoil energy and velocity, with cartridge presets.Caliber ComparisonCompare cartridges side by side — velocity, energy, recoil, range, and typical use.Muzzle EnergyKinetic energy, power factor, and momentum from bullet weight and velocity.
Optics & Zero
Buying
Ammo Cost-Per-RoundCompare ammo deals instantly — normalize box prices to true cost per round, shipping included.Reloading CostAdd up component costs to see your true cost per reload — and what you save vs. factory ammo.Cost-Per-Round CompareCompare ammo deals side by side by true cost per round — box price and round count don't tell the whole story until you do the math.
Find Your Gun
Legal & Valuation
Powered by the Gun ecosystem — one login across all six sites.
CCW Reciprocity & Gun Laws ↗Where your permit is honored + state-by-state firearm laws, on Gun Transfer.Free Gun Valuation ↗What's your firearm worth? Instant value estimates on Gun Price.Legal Transfer & FFL Help ↗Do a transfer the right way — Gun Transfer walks you through it.Stolen-Gun Check ↗Check a serial number before you buy, on Gun Clear.Marketplace ↗Buy and sell with the community on Gun Share.Your Digital Vault ↗Track your collection, serials, and docs on Gun Vault.
