AirMarksman FX Impact M4 Backbone Rail Medium – 30 MOA
Structural Upgrade. Rigid. Aircraft-Grade Aluminum Unit.
Overview
The Backbone Rail from AirMarksman is more than just an extended optics rail. This accessory has been designed to tie your entire rifle together and eliminate tolerance stacking by replacing both the factory optics rail as well as the factory backbone plate with one piece of extra rigid aircraft-grade aluminum. It reduces flex in the entire rifle, creating a more anchored and consistent shooting platform at the cost of only 4 added ounces to the total weight of the rifle.
On top of stiffening the M4 platform, the Backbone features a full 14 inches of Picatinny optics rail, the most useable rail space of any rail system on the market, with 30 MOA of elevation milled into the rail.
Based on input from top NRL Airgun Class shooters, AirMarksman also added a bolt retention detent to this rail that keeps the cocking handle and bolt probe held in the rear position when it’s opened. This feature prevents accidental double feeds and removes play in the cocking handle. The bolt retention detent can easily be removed during the installation process if shooters are looking to maintain the factory cocking handle feel.
100% made in the USA, the AirMarksman Backbone Rail System is the ultimate precision top rail for the M4 platform.
?? Compatible with M4 and prior models.
Key Features
Replaces factory optics rail and backbone plate with one rigid unit
Eliminates tolerance stacking and reduces rifle flex
Full 14″ Picatinny rail — the most usable rail space on the market
30 MOA of elevation milled into the rail
Bolt retention detent prevents double feeds and stabilizes bolt position
Detent is removable for factory-style operation
Precision machined from aircraft-grade aluminum
100% Made in the USA
Performance Advantages
Eliminates tolerance stacking for a more anchored, consistent shooting platform
Reduces rifle flex for improved accuracy at distance
Maximizes usable rail space in a medium-length footprint
Built-in 30 MOA elevation extends effective long-range capability
Bolt retention detent eliminates unwanted play and prevents double feeds
Adds only 4 ounces for minimal impact on overall rifle weight
Specifications
Spec Detail
Weight 1.2 lbs
Rail Length 14 inches
Elevation 30 MOA built-in
Material Aircraft-grade aluminum
Compatibility FX Impact M4 and prior models
Origin Made in the USA
