2014 STS Arms, LLC., all rights reserved.
Basic Rifle:

STS Arms, LLC ST4 basic rifle package has the following specifications:

Barrel: 1x7 twist, 4150 steel, salt bath nitride (Melonite), 16 M4 contour, A2 FSB F marked
Muzzle device: A2 flash hider
Caliber: 5.56mm NATO
Bolt Carrier Group: M16 carrier, chrome lined, HP/MPI bolt, Microslick coated, improved chrome silicon extractor spring (red)
Upper and lower receivers: 7075 forged aluminum, A4 flat top upper, mil-spec dimensions, Microslick coated interior
Trigger guard: Magpul MOE
Rear sight: none
Charging handle: 7075 forged aluminum, tactical latch, Microslick coated
Buffer: Microslick coated carbine weight, red Cerakote action spring
Grip: A2 mil-spec
Stock: basic M4, five position
Hand guards: M4 double heat shielded
Magazine: 30rd standard capacity Pmag (California model with 10 rd).
MOE rifle:

STS Arms, LLC MOE rifle has the following specifications:

Barrel: 1x7 twist, 4150 steel, salt bath nitride (Melonite), 16 M4 contour, A2 FSB F marked
Muzzle device:  Primary Weapons Systems FSC556 brake or Triad flash hider
Caliber: 5.56mm NATO
Bolt Carrier Group: M16 carrier, chrome lined, HP/MPI bolt, Microslick coated, improved chrome silicon extractor spring (red)
Upper and lower receivers: 7075 forged aluminum, A4 flat top upper, mil-spec dimensions, Microslick coated interior
Trigger guard: Magpul MOE
Rear sight: Mapgul MBUS flip up, dual aperature
Charging handle: 7075 forged aluminum, tactical latch, Microslick coated
Buffer: Microslick coated Enidine AR-restor hydraulic buffer, red Cerakote action spring
Grip: Magpul MOE
Stock: Magpul MOE
Hand guards: Magpul MOE
Magazine: Magpul Pmag 30rd standard capacity (California model with 10rd aluminum).
MSRP:  $1399
MSRP:  $1699