Among many excellent Lezyne products we've discovered, the Trigger Drive is a great CO2 inflator:
CNC machined aluminum dispenser with brass internals. Trigger Valve Operation for easy and controlled inflation. Twin Chuck head threads on to Presta and Schrader valves. Neoprene sleeve insulates hand from cold during discharge. Compatible with threaded CO2 cartridges, comes with one 16g cartridge.