The Copper M1P5 Mod from Avid Lyfe is a hard hitting, mechanical 18650 sleeve mod. The M1P5 Mod is precision machined with state-of-the-art CNC machines, using 110 Copper. Each M1P5 Mod is meticulously inspected and hand de-burred to ensure durability, beauty and overall premium functionality. Each M1P5 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!