With its 18” match-grade, cerakoted, stainless steel barrel at the heart of its design, the M15TAC18 blends rugged durability with exacting precision. The tactical handguard’s slim, octagonal profile sports a full-length MIL-STD 1913 12 o’clock rail for sights and accessories. The adjustable gas block allows the user to tune the rifle for their preferred ammunition and/or suppressor use. It comes standard with Magpul MBUS flip-up sights.