Cart “5.56 Extension Tube” has been added to your cart. Continue shopping Remove item Product Price Quantity Subtotal Remove MRP/AR15 BUFFER TUBE KIT $100.00 Increase quantity MRP/AR15 BUFFER TUBE KIT quantity Decrease quantity $100.00 Remove 5.56 Extension Tube $55.10 Increase quantity 5.56 Extension Tube quantity Decrease quantity $55.10 Coupon: Apply Update cart Subtotal $155.10 Shipment Shipping costs are calculated during checkout. Total $155.10 Proceed to checkout