The Vltor Weapon Systems A5 Receiver Extension Tube is a purpose-built AR-15/M16 A5 mil-spec buffer tube developed to deliver consistent strength, precise fit, and smooth cycling for modern rifle builds. Designed around the EMOD A5 stock system requested by the U.S. Marine Corps, this receiver extension provides a longer, seven-position adjustment range while maintaining compatibility with standard mil-spec M4-style buttstocks.

This A5 receiver extension tube is ideal for shooters looking to refine recoil management, improve shoulder alignment, and tailor length of pull for range use, training, or general-purpose rifle setups. Its mil-spec construction and carefully controlled tolerances support reliable performance across a variety of AR-15 platforms, making it a solid choice for upgrading an existing carbine or completing a new build. Vltor Weapon Systems’ reputation for thoughtful engineering and durable components is reflected in the clean integration and repeatable performance of the A5 system.

• Manufacturer: VLTOR
• Model: A5 Receiver Extension Tube
• Buffer Tube Type: Mil-Spec
• Firearm Type: AR-15
• Adjustment Positions: 7 Length-Of-Pull Settings