- Tasco
- TASER
- Taurus USA
- Techna Clip
- TekMat
- Thompson
- Tiger Rock
- Tikka
- Timney Triggers
- Tippmann Arms Company
- Tipton
- Tokarev Shotguns
- Toolman Tactical
- Torkmag
- Tornado Personal Defense
- TPS Arms
- TriggerTech
- Trijicon
- Tristar
- Troy
- TROY Industries
- True Precision
- TruGlo
- TulAmmo
- Tyrannical Targets
- Tyrant
- Tyrant CNC
- Ultradot
- Ultradyne USA
- Umarex
- Uncle Mike's
- Unity Tactical
- US Government
- US Optics
- US Palm
- US PeaceKeeper
- UST - Ultimate Survival Technologies
- UTG
- Vault Case
- Vector
- Velocity
- Venom
- Versacarry
- Vertx
- VG6
- Viridian Weapon Technologies
- VISM
- VKTR
- VLTOR
- Vortex Optics