Reptilia SR-15/AR-15/M4 Sling Loop for RECC-E Carabine Stock - Rear Black. Driven by the request of a military end user group for an anti-snag low profile quiet M-LOK attachment usable with the Recc-e stock. For them we answered the call. This is a drop-in upgrade for the existing rear QD cup on the Recc-e stocks. Specifications for Reptilia SR-15/AR-15/M4 Sling Loop for RECC-E Carabine Stock - Rear: Manufacturer: Reptilia Color: Black Condition: New Features of Reptilia SR-15/AR-15/M4 Sling Loop for RECC-E Carabine Stock - Rear Usbale with the Reece stock/zhukov Package Contents: Reptilia SR-15/AR-15/M4 Sling Loop for RECC-E Carabine Stock - Rear Reptilia 100-272: SR-15/AR-15/M4 Sling Loop for RECC-E Carabine Stock - Rear Black