Description The CMMG 55DA38D Low-Profile Gas Block is an essential accessory for any firearm enthusiast looking to customize their AR with a free-floating rail system. Material and Design Constructed from 4141 Chrome Moly Steel, this gas block stands out for its high resistance to wear and corrosion, ensuring a lasting lifespan for your AR setup. Its low-profile design makes it an ideal choice for a free-floating rail system. Installation With included installation screws, setting up the CMMG 55DA38D Low-Profile Gas Block is a breeze. Compatibility This low-profile gas block is compatible with .750 diameter barrels. Product Comes With: CMMG 55DA38D Low-Profile Gas Block made from 4141 Chrome Moly Steel Installation screws