Support Arm Endcap With MMB V2.0 For ERCFV2's mod ERCT Buffer
Support MMB V1 & V2
The author remixed this model.
Remix this with https://github.com/Enraged-Rabbit-Community/ERCF_v2/blob/master/Recommended_Options/ERCT_Buffer/CAD/STEP/Support_Arms/%5Ba%5D_Support_Arm_Endcap_With_MMB.step