If you want to keep it on the cheap side, this
http://www.blueforcegear.com/products/Blue-Force-Gear%C2%AE-Universal-Wire-Loop%E2%84%A2.html
works pretty well except that it can twist. They make short ones and longer ones. A long one around the delta ring works good with a VCAS 2 point type sling.
No way would I fasten anything to any gas block/front sight base that was not pinned.
Last edited by TWR; 05/13/12.
