The M4LEP .22 Caliber AR-15 upper maintains compatibility with all the same parts and accessories that fit your full caliber AR's, including the lower receiver.

Comes with non-functional forward assist plug. May be upgraded to fully functional forward assist by upgrade below. Upgrade includes stainless steel forward assist equipped action with Mil-Spec Forward Assist.

- Black Phosphated .22LR Action
- 16 inch W.A.S.P. steel barrel
- 1:16 inch twist
- Mil-Spec 1 or 2x28 threaded muzzle
- Carbon Steel Barrel
- Live Round Extraction
- Anti-Jam Charging Handle
- Firing Pin retained by standard AR15 or M16 Cotter pin
- Mil-Spec M4 Receiver with Ceramic Finish
- Gas Deflector
- Receiver Height Single Rail Gas Block
- A1 Flash Hider

UPPER DOES NOT INCLUDE MAGAZINE