Description
The A1 stock is one of the original AR silhouettes, and CMMG's take keeps that classic look while ditching the dated internals. Instead of a foam filled core like the vintage stocks used, this one is molded from modern high strength polymer, so it holds up to knocks and hard use without the guesswork. It runs a touch shorter than the more common A2 stock, which is a length of pull a lot of folks find sits just right when they shoulder the rifle.
What Sets the CMMG A1 Stock Apart
This is a fixed stock through and through, so there's nothing to rattle loose or adjust. The build is clean, the black finish matches the rest of your furniture, and there are no soft spots or cheap feeling seams. It slides onto a rifle length buffer tube and locks down solid, giving you that no nonsense feel the platform was designed around from day one.
Storage and Sling Setup on the A1 Assembly
Tucked into the rear is a storage compartment, which is a handy spot for a cleaning kit, batteries, or a spare bolt and a couple of small parts. There's also an integrated sling mount, so you can hang a two point or single point setup without adding hardware. It's the same practical layout that made the original A1 and A2 stocks so easy to live with.
Fitment for AR-15, AR-10, and LR-308 Builds
The A1 Stock Assembly is meant for any AR-15, AR-10, or LR-308 running a rifle length buffer tube, and it goes on without needing shims. Keep in mind this is the stock on its own and not a full kit, so it assumes you already have your buffer tube, buffer, and spring in place. If you're starting a fresh build or converting a carbine over to a fixed setup, CMMG also offers complete buffer tube and stock kits. Every CMMG product is backed by their Lifetime Quality Guarantee, which is a nice bit of peace of mind on a part you'll likely never think about again once it's on.
Key Specifications
- Manufacturer: CMMG
- Manufacturer Part Number: 55CA92D
- UPC: 810046236116
- Product Type: A1 Length
- Style: Fixed
- Color: Black
- Material: High Strength Polymer
- Buffer Tube Compatibility: Rifle Length
- Platform Fitment: AR-15, AR-10, LR-308
- Features: Rear Storage Compartment, Sling Mount
- Weight: 1.5 lbs
- Warranty: CMMG Lifetime Quality Guarantee
What’s Included
- CMMG A1 Fixed Stock Assembly
Frequently Asked Questions
Does the CMMG A1 stock need shims to install on a rifle length buffer tube?
No, you don't need any shims to mount the A1 Stock Assembly to a rifle length buffer tube. It slides on and secures with the stock screw. If your build already has the buffer tube, buffer, and spring in place, installation is straightforward.
Is the buffer tube, buffer, and spring included with this A1 stock assembly?
No, this is the stock by itself. It's meant to go onto a rifle that already has a rifle length buffer tube, buffer, and spring installed. If you're building from scratch or converting a carbine, CMMG offers complete buffer tube and stock kits that bundle those parts together.
How is the A1 stock different from the more common A2 stock?
The A1 stock is slightly shorter than the A2, which gives you a shorter length of pull that many find more comfortable to shoulder. The A2 is essentially an A1 with a spacer added to extend it. Both mount to a rifle length buffer tube and share the same fixed, no nonsense design.
Does the CMMG A1 stock have a foam core like the original?
No, CMMG builds this one from modern high strength polymer rather than the foam filled core used on the old originals. That makes it more durable and better suited for hard use. The buttpad is also polymer rather than a soft rubber pad.





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