I think it was replaced by H.B. 1076. HB 1076 has passed the House (with no amendments!) and has been passed to the Senate.
This is where it may need some help from us.
http://www.legis.state.tx.us/BillLookup/History.aspx?LegSess=83R&Bill=HB1076
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FWIW, One does not replace the other. They are two separate bills. HB1076 says any new Fed laws unenforceable in Texas. This bill has passed the House and is waiting for Senate vote. HB872 says guns/ammo/accessories (including suppressors) made in Texas and stay in Texas not subject to any Fed regulation. This bill has not been voted out of committee.