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AI illustration of a similar part on the gun.
AR-15 · Upper receiver
BCM M4 Flat Top Upper Assembly
$160
Build with this partOpens the builder with this part fitted. Other parts change only if they have to.
Specs
| Fa | Yes |
Pros and cons
Pros
- Forward assist and dust cover installed
- Laser T-marks for repeatable optic mounting
- Dry film lube inside, Type III hardcoat
Cons
- Tight barrel extension fit may need heat to install
Other upper receiver options
- Aero Precision M4E1 Stripped Upper Receiver $135
- Aero Precision AR15 Stripped Upper Receiver $100
- Palmetto State Armory PA-15 Stripped Upper Receiver $70
- Geissele Automatics Super Duty Upper Receiver $185
- Noveske Gen 4 N4 Upper Receiver $300
- CMT UPUR-2 Billet Upper $158
- San Tan Tactical STT-15L Lite PILLAR Billet Upper $209
- Gibbz Arms G4 Side Charging Upper $250