2014 STS Arms, LLC., all rights reserved.
ST4 Micro-Tac Short Barrel Rifle (NFA only):

STS Arms, LLC ST4 Micro-Tac Short Barrel Rifle has the following specifications:

Barrel:  1x8 or 1x7 twist, 4150 steel, salt bath nitride (Melonite) or chrome lined, 11.5 barrel, low pro gas block
Front Sight:  MBUS flip front
Muzzle device: Primary Weapons Systems FSC556 brake
Caliber: .223 Wylde or 5.56mm NATO
Bolt Carrier Group: M16 carrier, chrome lined, HP/MPI bolt, Microslick coated
Upper and lower receivers: 7075 forged aluminum, A4 flat top upper, mil-spec dimensions, Microslick coated interior
Trigger guard: Magpul MOE
Trigger: JARD adjustable or non-adjustable LE model
Rear sight: MBUS flip rear
Charging handle: BCM Mod 4
Buffer: Enidine ARrestor, red Cerakote coated action spring
Grip: Magpul MOE plus
Stock: Magpul MOE
Hand guards: Midwest Industries 9" or 10" SS gen 2
Magazine: Lancer L15AWM with steel feed lips or Pmag
Note:  Rifle shown with 11.5" barrel in Flat Dark Earth and Foliage Green accents, Pmag.
ST4 Basic Short Barrel Rifle (NFA only):

STS Arms, LLC ST4 Short Barrel Rifle has the following specifications:

Barrel:  1x8 or 1x7 twist, 4150 steel, 10.5 or 11.5"
Front Sight:  A2 FSB
Muzzle device: A2 flash hider
Caliber: 5.56mm NATO
Bolt Carrier Group: M16 carrier, chrome lined, HP/MPI bolt, Microslick coated
Upper and lower receivers: 7075 forged aluminum, A4 flat top upper, mil-spec dimensions, Microslick coated interior
Trigger guard: Magpul MOE
Trigger: Mil-spec trigger
Rear sight: None
Charging handle: tactical latch, forged
Buffer: CAR buffer, red Cerakote coated action spring
Grip: A2
Stock: M4
Hand guards: M4 Carbine
Magazine: Lancer L15AWM with steel feed lips or PMag
MSRP:  $2399
MSRP:  $1449