The F-1 Firearms 80M-15 Skeletonized is an AR-15 with large amounts of the receiver milled out. It reduces the weight while still maintaining structural integrity.
The upper receiver is an F-1 UDR-15 3G with an F-1 M-lok rail, BCG, ambi-charging handle, mag release and safety.
The lower is equipped with an F-1 skeletonized pistol grip and a Magpul MOE stock.
Also included are 2 X 30 round magazines, an angled foregrip, UTG red dot, extra F-1 handguard, an extra barrel nut, barrel nut wrench, a manual and a hard case.