6 model

Free

Sentry Gun Level 2 From TF2

Thingiverse

Free

Sentry Turret

MyMiniFactory

Free

Team Fortress 2 Sentry Gun.

Thingiverse

Free

Sci Fi Sentry Gun 20mm scale

Thingiverse

Free

Aliens: AGDitC - Sentry Gun

Thingiverse

Free

Sentry ADS-B Puck Mount for PIVOT iPad Case

Printables