I decided to put a YHM quad rail on my .50 beowulf. This is the YHM-9805 mid-length. I also bought a Tapco handguard removal tool to make things easier. The tool was well worth the $13 that I paid for it. Install went very easy, the tool easily held the delta ring out of the way with one hand while I removed the old handguard with the other. The new slid on, with only a few taps with a rubber hammer to seat the rear. The fit is tight, absolutely no movement. A nice upgrade for 5 minutes worth of work.
The tool, .50 cal Beowulf with old handguard.
Tool in place, ready to compress delta ring.