Bipods: HBL 9"to13" HBLS 9"to 13" Swivels HBLM 9" to 13" with notches HBLMS 9" to 13" with notches and swivels HBR 6" to 9" Bench Rest HBRS 6" to 9" Bench Rest Swivels  HBRM 6" to 9 Bench Rest with Notches HBRMS 6" to 9" with Notches and Swivels HBH 13 1/2" to 23" HB25 12" TO 25" HB25S 12" TO 25" Swivels HB25C 13 1/2" to 27" HB25CS 13 1/2" to 27" Swivels