I'm sure Kudu (Garin from SF) will step in, but I'm willing to bet that is referring to 5.56.
I believe the 300 SPS is rated to 8", maybe 7". The SF promo video has Barry shooting the Genesis (direct thread version of the 300 SPS) on either a 7" or 8" barrel under a not in production LMT handguard.
ETA: I really hope LMT releases that handguard at Shot Show 2016. It would serve excellent for a dual purpose SPR length rail, and a 300blk SBR with the suppressor tucked under.
Last edited by domestique; 01-13-16 at 23:23.
"When governments fear the people, there is liberty. When the people fear the government, there is tyranny. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." Thomas Jefferson.
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