Silverback Steel variable mass piston body (for SRS & TAC-41)

CNC Steel version of the variable mass piston body, for extreme mass configuration (55.1 grams instead of 19.0 grams for the aluminium version). Compatible with: original SRS piston (SBA-BPS-13), original TAC-41 piston (SBA-BPS-30), variable mass piston for SRS (SBA-BPS-18), variable mass piston for TAC-41 (SBA-BPS-31), original SRS piston end (SBA-BPE-01), original TAC-41 piston end (SBA-BPE-03)