Magpul Thumb Shelf Features The Magpul Thumb Shelf gives shooters a consistent reference point for the support hand helping drive repeatable grip placement shot after shot. By offering the thumb leverage against muzzle rise the shelf helps keep the muzzle settled during rapid strings of fire translating into faster more accurate follow-up shots. Its ribbed curved top is shaped specifically to improve thumb contact during recoil giving the shooter a more secure grip than a flat handguard surface alone provides. The shelf also assists when the shooter braces the handguard against a barrier adding stability in supported shooting positions. Designed for octagonal aluminum M-LOK handguards specifically the Thumb Shelf mounts using only a single M-LOK slot preserving the rest of the handguard s rail space for lights slings or other accessories. It is molded from Magpul s proprietary polymer a material chosen for its combination of light weight and long-term durability under repeated use. The ambidextrous design means the shelf works identically for right and left-handed shooters without needing a mirrored part. Finished in Olive Drab Green with a matte texture the Magpul Thumb Shelf is a simple effective upgrade for shooters running compatible octagonal M-LOK handguards. Magpul Thumb Shelf Specifications Manufacturer: Magpul Model: Thumb Shelf Type: Grip Compatible Hosts: Octagonal Aluminum M-LOK Handguards Color: OD Green Material: Polymer Mount Type: M-LOK Finish: Matte Hand: Ambidextrous Length: 1.55 Weight: 0.40 oz Available At: GrabAGun