AJ Posted December 13, 2004 Report Share Posted December 13, 2004 Its the latest .204 Ruger cartridge. Its been available in a variety of guns for a while now. Basically anything with a OAL similar to the .223 Rem can be had on an AR upper. I just saw an add offering the new 6.8mm Rem made by DPMS. Quote Link to comment Share on other sites More sharing options...
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