These are back in stock at JoeBobs, way cheap and another member had a couple on some rifles and they were pretty nice.
http://www.joeboboutfitters.com/Search_a/241.htm?q=matrix+handguard&Submit=
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http://www.joeboboutfitters.com/Search_a/241.htm?q=matrix+handguard&Submit=
Sent from my LG-D850 using Tapatalk