The Luth-AR AR-15 M4 Handguard Cap is a factory replacement round cap engineered to provide a precise, secure interface between your standard AR-15 M4 handguard and the barrel assembly. Built from durable steel with a low-profile round shape, it helps maintain proper alignment of the handguard while supporting the gas block area on .750" journal barrels.

This compact accessory is ideal for new builds or refreshing a well-used rifle where reliable handguard support is essential. Its simple, drop-in design makes installation straightforward for most AR-15 M4 configurations, whether the rifle is destined for regular range sessions, training, or general-purpose use. Backed by Luth-AR’s reputation for consistent, mil-spec-plus components, this handguard cap offers dependable fit and long-term durability.

Key Features:

• Manufacturer: Luth-AR
• Model: AR-15 M4 Handguard Cap
• Material: Steel
• Color: Black
• Bore Diameter: 0.750"
• Compatibility: Standard AR-15 rifles with M4-style handguards