Accuracy International Chassis Systems

 

Mile High Shooting is the largest Accuracy International dealer in the world and the only AI Certified Service Center in the United States, carrying the full lineup of AI chassis systems including the AT-X AICS, the exclusive MHSA x Raven Rifles Lurk 5280 AT-X.. Every AI chassis system is built from the same battle-proven polymer and alloy construction that Accuracy International uses in their precision rifle platforms, providing the rigidity, strength, and adjustability that competitive shooters and serious long-range shooters demand.

AI Chassis Models at Mile High Shooting

Mile High Shooting carries three distinct chassis configurations in the AI lineup. Understanding the differences between them helps narrow the right choice for your action, intended use, and budget before purchasing.

AT-X AICS

The AT-X AICS is the current-production Accuracy International chassis designed for competition and field use with Remington 700 short action and Rem 700 footprint clone actions. This model is available in two forend configurations: a 13-inch short upper and a 16-inch long upper. The 13-inch forend suits shooters who run a bipod close to the action; the 16-inch forend provides a longer rail section for forward-positioned bipod and ARCA attachment.

Specifications:

  • Action compatibility: Rem 700 SA only
  • Forend configurations: 13-inch short upper, 16-inch long upper
  • Stock: Fixed with adjustable cheekpiece and butt plate (toolless)
  • Rail system: M-LOK (current production)
  • Coating: Cerakote ceramic polymer
  • Available colors: Black, Dark Earth, Sage Green, Fire Red, Tungsten
  • Weight: 4.6 lbs (13-inch), 4.7 lbs (16-inch)

AT-X AICS Lurk 5280

The Lurk 5280 is an exclusive Mile High Shooting collaboration with Raven Rifles, featuring a custom Cerakote pattern applied to the AT-X AICS platform. It is built on the same chassis as the standard AT-X, with the same fixed stock, adjustable cheekpiece and butt plate, and Rem 700 SA compatibility. The Lurk 5280 is available in three configurations: a 13-inch forend only (no bridge), a 13-inch forend with short bridge, and a 16-inch forend with long bridge. The bridge versions include a top rail section forward of the action for optic or accessory mounting in front of the receiver. This is a Mile High Shooting exclusive and is not available through other retailers.

Specifications:

  • Action compatibility: Rem 700 SA only
  • Forend configurations: 13-inch (no bridge), 13-inch with short bridge, 16-inch with long bridge
  • Stock: Fixed with adjustable cheekpiece and butt plate (toolless)
  • Rail system: KeySlot
  • Coating: Custom Raven Rifles Cerakote (MHSA exclusive finish)
  • Available colors: Custom Cerakote pattern (not available in standard AT-X color options)
  • Weight: 4.7 lbs

Choosing the Right AI Chassis

The three AI chassis options at Mile High cover different use cases and price points. Here is how to match each to the right buyer.

For PRS and NRL Competition

The AT-X AICS is purpose-built for competitive shooting. The choice between KeySlot or M-LOK forend and AR-compatible grip interface align with the standardized accessory ecosystem most PRS and NRL competitors are already running. The adjustable cheekpiece and butt plate allow toolless LOP and comb height changes between stages. The 13-inch forend keeps weight down for field-position shooting, while the 16-inch forend suits shooters who prefer a longer chassis for supported shooting off bags and ARCA-compatible tripods. Either configuration drops a Rem 700 SA or Rem 700 footprint clone action in without gunsmithing.

Action Compatibility Notes

All AI chassis at Mile High Shooting are built for the Remington 700 footprint. This covers a wide range of Rem 700 clone actions that share the same trigger, recoil lug, and action screw geometry, including actions from Zermatt Arms, Bighorn Arms, Impact Precision, Lone Peak Arms, and others. Savage, non-Rem-700-footprint actions, and most factory rifles require a different chassis solution. If you are unsure whether your action is compatible, call or email Mile High Shooting before ordering.

Accuracy International Chassis FAQs

What is an AICS chassis and what rifles does it fit?

AICS stands for Accuracy International Chassis System. It is a drop-in precision chassis that accepts a Remington 700 short or long action (depending on the model) and converts it into a fully adjustable, modular AI-style platform without custom gunsmithing. All AICS models at Mile High Shooting fit the Remington 700 footprint, which includes Rem 700 actions and a wide range of aftermarket precision actions that share that geometry.

What is the difference between the AT-X and AX AICS?

The AT-X AICS is the current-production competition-oriented model, available for Rem 700 SA only. It uses a KeySlot or M-LOK forend rail system and is designed with a minimalist, field-portable profile. The AX AICS is an older, discontinued chassis system that is no longer available.

Are AI chassis compatible with Remington 700 footprint clone actions?

Yes. All AI chassis at Mile High Shooting are designed for the Rem 700 footprint, which covers a large number of aftermarket precision actions from manufacturers including Zermatt Arms, Bighorn Arms, Impact Precision, and Lone Peak Arms. Some clone actions may require minor fitting depending on tolerance variation. Contact Mile High Shooting with your specific action model before ordering to confirm compatibility.

Does Mile High Shooting service AI chassis?

Yes. Mile High Shooting is the only AI Certified Service Center in the United States, covering both AI rifles and AI chassis systems. For service or questions about AI chassis modifications and accessories, contact MHSA directly through the Accuracy International service page.