This is a picture of my M5 KAC RAS. Does the M4 KAC RAS come with the part circled in red? I have an M4 KAC RAS that came without one. The front of the top handguard is shaped to accept it like the M5. This part is not described in the installation manual (http://w ww.quarterbore.com/library/pdf_files/kac_ras_inst.pdf).
Thank you
Thank you
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