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AR Build Kits

MCS Gearup carries a great selection of AR Build Kits. We have low cost kits starting under $79 and premium kits at competitive prices. Many of our AR build kits have everything you need to complete a fully functioning rifle except the lower receiver (and of course a magazine). They’re cost-effective ways to complete a customized rifle on your own time. Customize in your choice of caliber, barrel length, buffer weight, handguard style, gas system, furniture, and much more, in many different colors. We also carry bufferless builds and short build kits for AR pistols, all Backed by our satisfaction guarantee.