Referenced product: RM400-16B-TRD
The M400 Tread has a 1 in 8" twist and the gas system is mid-length.

Referenced product: SOR52010
The only difference (that we're aware of) between the Romeo5 Tread and the regular Romeo5 is the Tread logo on the taller base. They also have slightly different packaging. Aside from that, included items and s...