Description
A front sling stud is handy, but it only does one thing. The Christensen Arms 4" Bottom Picatinny Rail fixes that by giving you a full MIL-STD-1913 rail surface right where you need it, while keeping a spot to run your sling. It bolts onto the existing forward sling stud location on the underside of your stock forend, so there's no permanent modification needed to add real mounting capability to a rifle that came without a bottom rail.
What the Bottom Picatinny Rail Does for Your Setup
The big win here is the integrated sling mount location. A lot of bottom rails force you to give up your sling attachment point when you clamp on a bipod, and that's a frustrating trade. This one keeps both in play, so you can run a Picatinny-mount bipod up front and still have somewhere to hook a sling. At 4 inches long, there's enough real estate to position a bipod, a light, or a hand stop without adding a bunch of bulk or weight to the front end.
Build and Fit on the 4-Inch Christensen Arms Rail
The rail is machined from aluminum and finished in black anodizing, which gives it a subdued, low-glare look that blends in on most modern rifles. It's a natural match for Christensen Arms stocks like the Ridgeline and Mesa, and because it uses the standard forward sling stud location, it works across a wide range of bolt-action rifles that share that setup. Owners tend to point out that the bottom contour mates up cleanly against the forend and that the width plays nicely with common bipod clamps.
Installation is straightforward for most stocks, and the necessary mounting hardware comes in the box. If you've been wanting to move to a Picatinny bipod or add gear up front without a whole new stock, this is one of the simpler upgrades you can make.
Key Specifications
- Manufacturer: Christensen Arms
- Model: 4" Bottom Picatinny Rail
- Manufacturer Part Number: 8100001000
- UPC: 691328232459
- Overall Length: 4 inches
- Rail Spec: MIL-STD-1913 (Picatinny)
- Material: Anodized aluminum
- Finish: Black
- Weight: Approx. 3.2 oz
- Mounting: Forward sling stud location
- Feature: Integrated sling mount location
What’s Included
- 4" bottom Picatinny rail
- Two mounting screws
- Installation hardware
Frequently Asked Questions
Where does the 4" Bottom Picatinny Rail mount on my rifle?
It attaches at the forward sling stud location on the underside of the stock forend. You use the existing stud position to secure the rail, so there's no need for a whole new stock. Once installed, you've got a full Picatinny surface plus a sling point up front.
Will this rail work with my Christensen Arms Ridgeline?
Yes. This rail is designed to install using the forward sling stud on rifles like the Ridgeline and Mesa. It also fits other bolt-action rifles that use a standard front sling stud location.
Can I still use a sling if I mount a bipod on this rail?
That's the whole idea behind the integrated sling mount location. You can clamp a Picatinny bipod to the rail and still have a dedicated spot to run your sling. It saves you from having to choose between the two.
Does the Bottom Picatinny Rail come with mounting hardware?
Yes, it ships with two mounting screws and the hardware needed for installation. For most stocks the process is straightforward with basic tools. Just take your time getting everything seated snug against the forend.





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