F.A.S.T. LR Max Chassis for Surgeon 1581-XL-R-LAP Action by Accurate Rifle Systems

Introducing our newest F.A.S.T. chassis LR Max by Accurate Rifle Systems.

This chassis is made for the Surgeon 1581-XL-R-LAP action.


  • Surface Finish: Graphite Black Cerakote (Cerakote # H-146)
  • Adjustable bag rider with elevation
  • Billet Cheek Piece
  • Billet Pistol Grip

The chassis comes with our proprietary BipodeXt horizontal bipod extender built in for a more integrated and lighter set-up to stabilize the weapon and better manage and mitigate recoil.



Available on backorder

UPC N/A SKUFAST-G2-ARS-SGN-1581-XL-R-LAP Categories,
Product Specs
Surface Finish

Black Hard Anodized, Multicam Camo, Sandstorm Camo

  • Extended state distance from recoil lug to bipod’s attachment point: 29.5”
  • Contracted state distance from recoil lug to bipod’s attachment point: 14.5”
  • Adjustable at any distance between contracted and extended states
  • Adjustable length of pull
  • Adjustable cheek pieces
  • Adjustable butt pad height
  • ARCA Swiss rail along bottom of fore-end built-in
  • M-LOK ports on barrel channel
  • Rear bag rider and mono­pod adaptable
  • Materials: 6061 T-6 Aluminum and 3K carbon fiber