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adams-arms-556-base-upper
Click for larger view.

This particular upper was designed with a midlength gas system, which gives you multiple advantages over the more traditional carbine length gas systems. A midlength gas system is longer by 2” allowing a longer sight radius between front and rear sights for easier target acquisition and also giving you more available rail space to attach tactical gear. The extra length also means you can have a more comfortable shooting stance because it allows you a longer reach. These tactical uppers retail for $999.

These uppers come equipped with:

-16” midlength chrome lined government contoured barrel
-1:9 right handed twist
-Midlength free floating quad rail
-Adams Arms midlength piston system
-Adams Arms receiver – with M4 feed ramps
-A2 flash hider

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Click for larger view. This particular upper was designed with a midlength gas system, which…