Real Avid Lug-Lok Upper Vise Block Prepper The shirt is machine-washable for

The shirt is machine-washable for minimal maintenance and has a conventional collar and band with included collar stays

and draw efficiency while maintaining a stable

Buy now and take the first step towards ultimate comfort and practicality

helping you stay agile during extended wear

Real Avid Lug-Lok Upper Vise Block Prepper The shirt is machine-washable forTraditional clamp style upper blocks fit poorly and can exert enough inward pressure to damage the receiver when applying torque to a barrel nut or flash suppressor. Thats bad design. So, we designed an upper block that leverages the strongest part of the gun the barrel lugs inside the star chamber. The Lug Lok is precision machined and precisely fits into all Mil Spec uppers. It mates perfectly with the barrel lugs, while allowing you to rotate the