The USCM – Turret Mod mod introduces the minified USCM UA 571-C Automated Sentry Gun.
The turret is a standalone self-powered turret using long bursts of overwhelming high caliber bullets to devastate your enemies. The turret cannot be built but must be bought to the USCM Surplus Space Traders.
USCM - Turret Mod Review
No doubt the USCM standalone Turret is a very useful defense resource. The texture could use some real improvement though.