STS Arms ST4 for Sale
Founded: 2010
HQ: United States
The STS Arms ST4 is a semi-automatic, gas-operated AR-15 carbine with a mid-length gas system, chambered primarily in 5.56×45mm NATO. Its standout feature is a Microslick ceramic treatment on the bolt carrier group and internal receiver surfaces for low-friction cycling and corrosion resistance.
No active auctions for STS Arms ST4.
