Build a Complete 16 Lightweight Barrel AR Kit. This kit contains everything you need to build your own AR except the stripped lower receiver. - The Kit Contains: - Fully assembled 16 Lightweight Upper with 15 Keymod Palm Handguard - Your choice of either an MBA-1 Buttstock Assembly or MBA-3 Buttstock Assembly - Complete Lower Parts Kit - Add to your build with optional add-on parts such as a Velocity Drop-in trigger or The Lower Enhanc-AR Kit. - This Kit does not come with the lower receiver. You will have to supply a lower receiver purchased elsewhere. We recommend that you look for a Mil-Spec stripped lower. - Includes: - Your choice: MBA-1 Fixed Rifle Buttstock assembly or MBA-3 Adjustable Carbine Buttstock Assembly - LLRPK-1 Complete .223/5.56 Lower Receiver Parts Kit - Assembled Complete 18 Fluted Bull Barrel Upper: - HG-V-15K Palm Handguard Vented 15 KeyMod with Barrel Nut - BAA3-L16 16 Light Weight Barrel - FTT-EA A3 Upper Receiver Assembled - BC-A-223 Fully Assembled Bolt Carrier .223 - BL-04A Carbine Gas Tube - GB-LP750 Gas Block .750 - BL-06-A2 A2 Flash Hider - Lightweight 16 Barrel - Available in 16 - 5.56 mm - 4140 Chrome Moly - Threaded Barrel Thread Pitch 1/2 x 28 - Gas Block Diameter .750 - Gas Tube Length Carbine - 1-9 RH Barrel Twist - 6 Lands and Groves - M4 Feed Ramp - Button Broached