The Yankee Hill AR-15 Lightweight Upper Assembly is a drop-in part that will attach to virtually any standard AR-15 lower assembly. Comes complete with charging handle, Mil Spec bolt and bolt carrier assembly, it is ready to pin to a complete lower assembly with no modification. Barrels feature Yankee Hill's Diamond fluting which reduces weight and increases cooling. Uppers come complete with Yankee Hill Lightweight free float 4-rail handguards which increase versatility and accuracy without adding too much weight.
- Upper Receiver Type: Forged 7075-T6 Aluminum A3 Flat-Top
- Barrel Length: 20"
- Barrel Contour: Medium, Diamond Fluted
- Barrel Material: 4140 Chrome Moly Steel
- Muzzle Thread Pattern: N/A
- Chrome Lined: Yes
- Barrel Finish: Parkerized
- Twist Rate: 1 in 7"
- Chamber: 5.56x45mm NATO
- M4 Feed Ramps: Yes
- Muzzle Device: N/A
- Gas System Length: Rifle
- Gas Block Diameter: 0.750"
- Handguard: 12.5" Free Float Lightweight Quad Rail
- Sights: N/A
- Extras: 2 Yankee Hill Mini Scope Risers