JConcepts 5200S Black RC10B7/B7D 9.2g Steel Arm Mount "D" Block Tank Car they became a regular feature

they became a regular feature of many of the big Class 1 railroads

double action dump gate

and also incorporates new attachment parts

Parts: 320

and custom wheels

JConcepts 5200S Black RC10B7/B7D 9.2g Steel Arm Mount "D" Block Tank Car they became a regular featureJConcepts 5200S Black RC10B7 B7D 9. 2g Steel Arm Mount "D" Block JConcepts adds to the amazing line up of accessories for the RC10B7 RC10B7D with the steel D mount block. Available in steel and black oxide color, the precision machined piece is carefully crafted to accept the standard Team Associated pill inserts. The suspension mounts are a critical piece of any vehicle, they provide the base for adjustments such as toe in, anti squat and wheelbase.