Cheap And Discounts CNC Metal Buffer Tube For BD556/LDT-HK416/TTM/JM 9 M4/SLR/AEG Modification Upgrade Wholesale. Buy Directly From Merchant JYQC Tactical Equipment Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.