KMRNL V2.1 Bag Rider for Sig Sauer Cross Rifles

Why It Exists

The factory rear section of the Sig Sauer Cross is compact and lightweight, but it was not designed as a dedicated rear-bag interface.
When shooting from bags, packs, or field supports, the rear of the rifle can shift, roll, or settle inconsistently depending on bag fill, pressure, and shooting position.

The KMRNL V2.1 Bag Rider was created to give the Sig Cross a more defined rear support surface.
Instead of using a plain flat bottom, the V2.1 uses a full V-shaped bottom that helps move bag media apart and guide the rifle into a centered position.
The result is a more planted feel, improved rear-bag control, and a more repeatable shooting position.

This design builds from the earlier KMRNL V2 Bag Rider geometry and refines it with a seamless full-length V-bottom profile for better bag engagement and improved shooter control.

Key Benefits

• Full V-bottom control: Uses 45-degree side geometry from front to back to create a defined rear-bag interface.
• Improved media displacement: Helps part and move rear-bag fill instead of simply compressing the bag from the top.
• More centered support: The V shape helps the rifle settle into a consistent position on compatible rear bags.
• Reduced lateral movement: Designed to help limit side-to-side wander during recoil and position adjustment.
• Repeatable rear-bag position: Helps the shooter rebuild the same support position from shot to shot.
• No incline or ramp: Built for centered bag control, not forward/back elevation ramping.
• Purpose-built fit: Designed around the Sig Sauer Cross platform, not as a generic universal add-on.
• Tested by professional users: Field-tested and evaluated with PRS, NRL, and Hunters.

Design Details

Flat bag riders can work well for smooth tracking, but they may ride on top of soft bag media depending on fill and pressure.
The KMRNL V2.1 takes a different approach by using a full V-bottom to help the rider settle into the bag.
This gives the shooter a more defined rear support point and helps the rifle feel more centered behind the shot.

The V2.1 is especially useful with rear bags that allow the V-bottom to settle between the support surfaces.
It can also help when using softer bags or field supports where bag fill movement can affect consistency.

V-Bottom vs. Flat-Bottom Bag Riders

The V2.1 was designed for shooters who want a more locked-in rear support feel than a standard flat-bottom rider.
It is not intended to replace every flat bag rider use case, but it gives the Sig Cross a more defined rear-bag interface for supported precision shooting.

Fitment

• Platform: Sig Sauer Cross rifles
• Product type: Full V-bottom rear bag rider / rear support surface
• Use: Rear bags, shooting rests, packs, and field supports
• Best suited for: Shooters who want a more centered and repeatable rear-bag interface

Use Case

The KMRNL V2.1 Bag Rider is intended for shooters who use rear bags, packs, or field supports and want a more centered rear support position.
It is especially useful for prone shooting, precision field shooting, hunting rifle setups, range work, and supported positions where rear-bag consistency matters.

The goal is simple: center the rifle, control the rear support, and build a more repeatable position behind the shot.