The Gyre Mod from Avid Lyfe is a hard hitting, mechanical 18650 mod. The Gyre Mod is precision machined with state-of-the-art CNC machines, using Aluminum, Naval Brass, or 110 Copper. The Gyre mod is available in slow twist, fast twist. Each Gyre Mod is meticulously inspected and hand de-burred to ensure durability, beauty and overall premium functionality. Each Gyre Competition Mod goes through a rigorous inspection before leaving the AV facility. All Avid Lyfe products are proudly made in the USA and backed by a limited lifetime warranty!