My camera’s on the fritz so I found this stock photo online (which took me forever to find) This is the set up I have which came with my BCM upper and am purchasing a VCAS. I’ve never used a sling on my AR so I’m interested in using this attachment point or perhaps another one that can be replaced simply but effective. Any other suggestions? My BCM is a 16" M4 carbine length with MOE handguard so I’m not interested in any alterations to the handguard. A quick release possibly? Need some help. 
Thanks. Also, for the rear sling mount I have a VLTOR SASE slot. Any suggestions with the rear as well?