Reptilia Corp just restocked their website with their excellent, low-profile sling mount – the Socket M-LOK QD. This compact mount orients the front sling attachment that makes sense for the direction you are typically pulling the sling, makes the attachment point more snag-resistant, and protects the button on the swivel from being pressed inadvertently.
This latest run of Sockets also includes a new clear anodized version that is exclusive to Q. It is available directly from the Q website: LiveQorDie.com
Aluminum QD mount for $50? Hard pass..