THE DEFINITIVE GUIDE TO KNIGHTS ARMAMENT SR-15 16 UPPER

Two pushbutton (aka QD or snap-in) sling swivel attachments arrived With all the SR-15E3 and there are ambidextrous holes to snap them into to the SOPMOD buttstock and at 3 places on both sides from the upper and reduced receivers.Also there are the buffer tube mounts for sling swivels (which seem to be a favorite of pat Roberts 6940s ) that don't