The Lewisville Gun Show will be held next on Apr 18th – 19th, 2026 in Lewisville, TX. Come out and Buy, Sell or Trade! This American Gun Show is held at NTX Arena - Lewisville and hosted by American Gun Shows. All federal and local firearm laws and ordinances must be obeyed. The Lewisville Gun Show will be held on Apr 18th – 19th, 2026 in Lewisville, TX. This Lewisville gun show is held at NTX Arena - Lewisville and hosted by American Gun Shows.