The Ruger 10/22 has no shortage of aftermarket options, but usually, those upgrades come with a weight penalty. If you are building a Steel Challenge rig or a lightweight “rabbit gun” for the bush, every ounce counts. Spectre Ballistics International (SBI) out of Canada has released the Superlite Chassis to address that specific need. It is a minimalist, modular system designed to be as light as humanly possible while still being rigid.
Overview
The SBI Superlite is a two part system consisting of a rear chassis and an optional M-LOK handguard. Unlike traditional stocks where the action sits in a cradle, this chassis essentially clamps onto the rear of your receiver. It replaces the standard receiver pins with threaded ones, allowing the chassis to bolt directly to the action. This creates a very stiff interface.
Specifications
- Material: CNC machined 6061-T6 Aluminum
- Chassis Weight: 195g (6.9 oz)
- Handguard Weight: 130g (4.8 oz)
- Finish: Hard black anodized or “Tanodize”
- Stock Interface: 1913 Picatinny (3-slot)
- Grip Compatibility: Standard AR-15 grips (non-beavertail recommended)
- Receiver Compatibility: Ruger 10/22, SBI C-71, Brownells BRN-22, and most standard clones
- Price: $179 for the lower receiver bit, plus $125 for the forend
Usability
In the field, the first thing you notice is how light and flickable the gun becomes. Because the chassis is so minimalist, the balance point moves forward, which makes for very fast transitions between targets in a competition setting.
The installation is a bit different than your standard drop-in stock. You have to be careful to center the handguard before tightening the action screw, especially if you are running a thick bull barrel. There is a small amount of wiggle room there that requires a steady hand during assembly.
One ergonomic note: this setup puts your cheek rest high. If you are using an optic mount that is integrated into the receiver, you might find that traditional stocks or cheek pieces are too high. I actually had to remove the cheek rest from my Grey Birch stock just to get my eye low enough to see through the very low mounted red dot specific Grey Birch receiver.
Aftermarket and Potential Modifications
Since the rear uses a standard Picatinny interface, your stock options are huge. You can run anything from a lightweight SIG-style folder to a fixed skeletonized stock like SBI’s upcoming pic rail stock.
- Sling Mounts: Neither the chassis nor the handguard come with built-in QD cups. You will need to use the M-LOK slots on the handguard for a forward attachment and something for the rear if you want to carry it on a sling.
- Magazines: It works perfectly with standard Ruger mags. It also plays nice with the SBI magazine adapter for Remington 597 mags, which is a popular choice for Canadian shooters looking for higher capacity.
Conclusion
The SBI Superlite is not for everyone. If you want a traditional “rifle” feel with a full forend to grip, you might find it too sparse. However, for a dedicated speed-shooting rig or a backpack gun where weight is the primary concern, it is hard to beat. It is a well-engineered, Canadian-made solution that solves the rigidity issues of the 10/22 platform without the usual bulk.
