The LBE ARLGBP is a low profile steel gas block finished in black nitride that comes with a pre-installed pistol-length gas tube. The gas tube is constructed from 304SS seamless tubing. This gas block is designed for AR-15 platform use with a pistol-length gas system. Model: Low Profile Gas Block; Size: Pistol Length; Material: Steel; Finish: Black Nitride. SKU ACC-LBEU-ARLGBP; Mfg. Part Number ARLGBP; UPC 784682014646. This item is not available to ship to California, Illinois, or Washington. Condition: New. Manufacturer: LBE Unlimited.