Samson Enhanced Low Profile AR-15 Gas Block. Includes four 10-32 set screws two tangential clamping for added clamping. Will allow for attachment of any Evolution accessories without compromising free-floating barrel. Available for standard AR-15 barrel diameters of 0.625" & 0.750". Extended sleeve option covers barrel scars from front sight base. Specifications for Samson Enhanced Low Profile AR-15 Gas Block LP-GB: Mfg Item Num: LP-GB Type: ACCESSORIES - GUN ACCESSORIES - GUN PARTS AR-15 Parts: AR-15 Parts made in specialized factories: made in specialized factories Tactica: Tactical Master Model Header: Enhanced Low Profile AR-15 Gas Block The Samson Enhanced Low Profile AR-15 Gas Block LP-GB is a quality addition to the Samson lineup. For more great deals on AR Gas Blocks by Samson please browse our Samson Gun Parts page. Samson Enhanced Low Profile AR-15 Gas Block