I must be out of my tree for doing this, but I picked up one of these "Claw" clones from hical.ca for my SA20. We have these on our C7A2s at work, but I was never a big fan of them. Some have experienced snagging on their tac vests, others love them. My opinion of these is pretty neutral but lately I've had a bought of OCD and decided my SA20 needed one of these.
https://3.bp.########.com/-towV-YuoYXs/V-VPrLTM3XI/AAAAAAAAj_8/aL48U1UCHN0aVYOjCQKBdusVCaByM0IPgCPcB/s1600/DSC_0012.JPG
https://2.bp.########.com/-5RhRYpDaQwY/V-VPrLODw9I/AAAAAAAAj_8/2DaCTA_dAmE2ZL9_poStmeMYCEIyvUssQCPcB/s1600/DSC_0014.JPG
https://1.bp.########.com/-EtsnqvyAV84/V-VPrCvCLaI/AAAAAAAAj_8/fyyNT40C8rkX9_nBexJ97_O8Q2np6NxIACPcB/s1600/DSC_0015.JPG
https://3.bp.########.com/-byMQ8YhrDk0/V-VPrPkezVI/AAAAAAAAj_8/ELnPKU8RQKErky-XQOpqYMhNt9bta0nmACPcB/s1600/DSC_0016.JPG
It's a pretty easy installation and all you really need is a punch set, a hammer and less than five minutes of work.
Thanks hical for feeding my OCD, lol!