Sometimes frustration can often breed innovation or a new idea on how to do something. That is exactly how our 3D printed jig came to life! This jig has been meticulously designed to help align your ar buffer tube and lower receiver together. This allows you to properly torque and stake your castle nut. Also, our jig allows you to essentially complete your lower build minus your grip parts. This user friendly design allows 360 degree rotation to be able to install parts on either side of your lower. Whether you are a professional or DIY'er, our jig is effective by helping you save time with one single at lower building tool. Our jig gives you the peace of mind knowing your parts are installed correctly and torqued to spec if required. Say goodbye to the hassle of misaligned buffer tube and say hello to a better building experience!

We have a few colors as well  I can print, purple, “clear” teal, dark purple, purple, burnt titanium and gold