RSOV.com now has in stock the ACM Troy TRX-style 9in BattleRail for US$73.99. Made for M4 airsoft guns, the BattleRail is a free floating rail with rotary locking system. The original Troy TRX BattleRails are made of aircraft grade aluminium and coated with Teflon. We're not sure the material made for the ACM replica, but assume it's not the same as the real deal.