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Sirio R4 Frame Kit

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Low Profile Kit:
Spare Arm:


The AVANT Sirio R4  is a  lightweight 4" Stretched X Racer is designed to support the micro sized camera such as Runcam Micro Swift V1/V2 and the new Runcam Micro Swift V3 with mounting pattern 19mm-19.5mm. Standard sized camera will also fit but with a set of custom made 3d printed mount. New improved features with  3.5mm thick chamfered arms,  2mm chamfered top plate, 2mm camera mounting plate, 2mm chamfered bottom plate and 2mm mid plate for much better rigidity and durability.  Standoffs are secured on top of the press nuts  with only 12 screws to complete the frame assembly.  All press nuts come pre-installed for simple assembly. Kit comes standard with 25mm long standoffs with plenty of space mounting the FC stack. Optional 22mm Low Profile Kit is also available.  Air frame + hardware weighs 51g.



        "Free DHL upgrade will be offered when purchasing (Frame Kit + Motors) OR (any 2 Frame kits), please choose standard shipping USD5.00 when proceeding checkout"  



  • Weight (Airframe + Hardware): 51g (+/-3g)
  • Motor to Motor diagonally: 182mm
  • Arm Thickness: 3.5mm
  • Bottom Plate Thickness: 2mm
  • Mid Plate Thickness: 2mm
  • Top Plate Thickness: 2mm
  • Camera mounting plate thickness: 2mm
  • FC mounting pattern: 30.5 x 30.5mm (M3 mounting holes) and 20mm x 20mm (M2.5 mounting holes)
  • ESCs: 20a-35a
  • Motor Size: 14xx - 15xx (Fits Brotherhobby Avenger 1507 motor without overhanging)
  • Motor mounting pattern: 12mm x 12mm
  • Prop Size: 4"
  • Lipo: 4S 800mah - 1100mah



  • 4x    3.5mm 3K Twill Weave carbon fiber arm (Chamfered)
  • 1x    2mm 3K Twill Weave carbon fiber bottom plate (Chamfered)
  • 1x    2mm 3K Twill Weave carbon fiber mid plate (Chamfered)
  • 1x    2mm 3K twill Weave carbon fiber top plate (Chamfered)
  • 2x    2mm 3K carbon fiber camera mounting plate
  • 4x    25mm aluminum textured grip standoffs
  • 8x    M3 high quality stainless steel press nuts (pre-installed on mid plate)
  • 4x    M3*6 high tensile steel screws
  • 4x    M3*10 high tensile steel screws
  • 4x    M3*14  high tensile steel screws 
  • 4x    M3*15 nylon screws
  • 4x    5mm hex nylon standoff
  • 8x    M3 nylon nuts
  • 1x    XT30 connectors
  • 1x    Avant battery strap


         "This frame kit is not applied for 40% off on the replacement parts"


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