AR15 Rifle and Pistol Lower Receiver Parts Build Kits

We have a large selection of rifle and AR pistol Lower Parts Build Kits for your lower receiver. Lower Build Kits come with everything that a lower parts kit (LPK) comes with but they also include a Stock and a buffer tube kit or an adjustable pistol brace for AR pistol builds. Our lower build kits come with everything that you need to complete your stripped lower, other than the lower itself. All of our RTB branded build kits come with mil spec 7075 buffer tubes and mil spec lower parts. Our RTB pistol lower build kits come with either a 7075 pistol tube or an adjustable mil spec buffer tube. The base components that we use in our kits are sourced from military contractors and everything is made in the USA!

Shop our selection of lower kits that include all types of Magpul, SB Tactical and Mission First stocks and braces. Our rifle lower kits come with adjustable 6 position buffer tube kits and our pistol lower build kits come with 7075 robust pistol buffer tubes and pistol stabilizing braces. With all of our lower build kits you will have the option to select an upgraded round oversize Magpul MOE trigger guard or similar upgrades. You will also have the option of upgrading the grip! Shop with us today and find the exact lower build kit that you need to complete your AR rifle or AR pistol.

The Rifle or Pistol Lower Build Kits that start with RTB utilize our true Mil-Spec components that are sourced from well established .mil contractors. Right To Bear branded Lower Build Kits come with industry leading LPK components along with premium fire control group components. The price differences between our RTB kits and the other kits is due to the premium parts used. There's a night and day difference in look, feel and durability between our triggers and the other NON-RTB kits, such as Palmetto State Armory kits.
The Lower Build Kits that are not labeled "RTB" are still good kits and are comparable in quality to other major brands, such as PSA and Anderson Manufacturing.