GunBuildr
AI illustration of a similar part on the gun.
AR-15 · Upper receiver
San Tan Tactical STT-15L Lite PILLAR Billet Upper
$209
Build with this partOpens the builder with this part fitted. Other parts change only if they have to.
Pros and cons
Pros
- Billet upper at only 6.9 oz
- Keeps shell deflector despite slick side
- Documented clearance for many handguards
Cons
- No forward assist, cannot be added
- Ejection port cover parts sold separately
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
- BCM M4 Flat Top Upper Assembly $160
- Geissele Automatics Super Duty Upper Receiver $185
- Noveske Gen 4 N4 Upper Receiver $300
- CMT UPUR-2 Billet Upper $158
- Gibbz Arms G4 Side Charging Upper $250