OT Firearms 10.5" Ballistic Advantage Upper Receiver Group - 5.56 / .223

Old Testament Firearms
$439.00 $379.99
Current Stock:

Old Testament Firearms offers this phenomenal 10.5-Inch AR15 Rifle Upper Receiver Group! Built upon a Ballistic Advantage Modern Series Barrel chambered in 5.56 NATO (.223) with carbine gas system for reliable operation suppressed or unsurpressed. It provides exceptional reliability and durability! Regardless of how much you shoot, you should never have to worry about your firearm functioning properly and with our OTF Upper Receiver Group - You won't have to. Our Gen2 Free Float M-LOK Handguard (NO LOGO) is 9.85" in length to allow attachment of your preferred suppressor mount or to run the A2 Flash Hider without damaging the rail. Our handguard locks up solid with anti-rotation tabs and offers M-LOK slots for mounting of your weapon lights, foregrip or grip panels.

It is built with quality, made in the U.S.A. components to provide reliable function even after thousands of rounds! We don't strive to sell the lowest price upper receiver groups, but we do aim to provide the best value for the money without sacrificing any quality or reliability.


This 5.56 Upper Receiver Group consists of the following components:

  • 10.5" Ballistic Advantage Modern Series AR15 Barrel, Salt Bath Nitride Finish, 1:7 Twist 
  • 10" Free Float OT Firearms M-LOK Gen 2 Handguard (9.85" Top Rail Length)
  • OT Firearms Forged 7076-T6 M4 Upper Receiver
  • Nitride Finish Low-Profile Gas Block
  • Nitride Finish Carbine Length Gas Tube
  • A2 Flash Hider


Concerned about quality? Don't Be! Old Testament Firearms stands behind their products! All Complete AR15 / LR308 Assemblies and Firearms come with a LIFETIME WARRANTY against manufacturing defects and workmanship! Our components are meant to be put to work!