Part number: AR-HG Ventilated match handguard. Side vents narrow at the bottom to be more comfortable in the hand. Slotted for a handstop and rotates around the barrel to enable the handstop to be canted under the rifle.....$80.00 Part number: AR-HGL (4" longer).....$90.00 Part number: AR-HGV Ventilated with the same pattern as the "TAWS" handguards, but mounts the same, with the canting ability and handstop slot as the matching handguards......$100.00 Part number: AR-HGVL (4" longer)......$110.00 (Please specify color, see color chart). Part number: AR-GBA Adjustable Gas Block has a "bleed-off" valve to help slow action cycling and reduce residual barrel pressure available in .750", .812", and .937"......$85.00