Re: Front QD sling point
On my Troy TRX handguard, I've got one of these:
http://store.troyind.com/Troy_Q_D_SWIVEL_w_TRX_Cooling_Hole_Low_Pro_Mount_p/srai-trx-herp-00.htm
Works great and is pretty low profile. Install was simple. Not sure if it will fit any other rails though.