Created with Sketch. Created with Sketch.
Toggle menu
Have a question? Live support call 239-848-6757

Shop by Category

  • .223 Wylde
  • .300 Blackout
  • .350 Legend
  • .45 ACP
  • 1911
  • 5.56 Nato
  • 6.5 Creedmor
  • 6.5 Grendel
  • 7.62x39
  • 9mm Luger
  • Accessories/Tools
  • AK-47
  • Anodized Parts
  • AR 5" Inch Builds
  • AR Build Kits
  • AR Lower-Parts
  • AR Upper Parts
  • AR-10
  • AR-15/M4
  • Assembled Uppers
  • Barrels
  • Beretta
  • Bipod's
  • Bolt Carrier Groups
  • Buffer Tubes
  • ButtStocks
  • Cerakote
  • Charging Handles
  • Closeout Specials
  • Combo Deals
  • Gas Tubes/ Gas Blocks
  • Glock
  • Gold Parts
  • Grips
  • Lasers & Lights
  • Lower Part Kits
  • Magazines
  • MCK Accessories
  • MCK Micro Conversion Kits
  • Muzzle Brakes
  • Optics
  • Pistol Braces
  • Rails & Handguards
  • Short Buffer System
  • Shotgun
  • Sig Sauer
  • Sights
  • Silent Recoil Springs
  • Skeletonized Parts
  • Smith & Wesson
  • Triggers

    • Shop by Brand

  • MCS
  • CAA
  • Presma
  • Trinity Force
  • JE Machine tech
  • XTS
  • LUTH-AR
  • Armaspec
  • Northtac
  • Rise Armament
  • View all Brands

    • 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.

    Compare Selected