Lower Receiver Parts

SIONICS H3 Buffer

SIONICS H2 Buffer

SIONICS H Buffer

SIONICS Receiver Extension Nut

SIONICS 6-Position Receiver Extension

SIONICS Lower Completion Kit

SIONICS Lower Receiver Extension Kit

SIONICS Premium Lower Parts Kit

SIONICS Enhanced Lower Parts Kit

SIONICS QD Receiver End Plate

SIONICS Enhanced Mil-Spec Trigger Assembly

SIONICS Enhanced Two-Stage Trigger Assembly

SIONICS Ambidextrous Selector

SIONICS Builder’s Lower Parts Kit