I've been looking at picking up a BRN-180 and saw that 17design also makes some lowers for it.
https://www.brownells.com/rifle-par...157.aspx?avs|Make~~Model_1=Brownells__BRN-180
https://www.brownells.com/rifle-par...157.aspx?avs|Make~~Model_1=Brownells__BRN-180