Check out ABARMS hand guard. Fit great in your hand and has the best heat shield going. There are some videos on youtube about them.
The contour in the grips give you a real solid comfortable grip. I tried magpul, but liked ABARMS better.
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US Naval Aviation AMSC 20 years ( retired) ASW/Aircrew Wings, P2V plane capt. Also a Tail hooker, US Naval Academy (DI) Shooting Instructor (Annapolis) NDW shooting team member. VN vet, Bluenose and Shellback.
Alway keep your six covered