Add to cart Quick view KAK 515-0604-006 Mini Buffer Tube Mil-Spec KAK Price: $29.98 $29.98 When installed, the M4 stock is taken down from just over 6.5" to 5", and the Mini Buffer Tube is only 5.25" long from the receiver's end. The Mini Milspec M4 Stock can collapse completely flush in... Price: $29.98 $29.98 Add to cart Quick view In cart: 0 Quantity: Decrease quantity of KAK 515-0604-006 Mini Buffer Tube Mil-Spec Increase quantity of KAK 515-0604-006 Mini Buffer Tube Mil-Spec Price: Price: $29.98 $29.98 Subtotal: Add to cart