Description
The Magnum Research MR SwitchBolt 22 LR 18 inch MCA-22 is a rimfire semi-auto built for shooters who want a reliable trainer that feels like a centerfire rig. Chambered in .22 LR, it pairs an 18-inch tensioned aluminum barrel with a modular Luth-AR MCA-22 chassis stock, giving you lightweight handling and repeatable accuracy at the range or in the field. The receiver is machined from 6061-T6 aircraft aluminum and includes a full-length Picatinny rail for optics, while the left-side charging handle can be swapped to the right for southpaws. At $793.25, this rifle delivers a solid shooting platform for plinking, practice, or small-game hunting.
| Manufacturer | Magnum Research |
|---|---|
| Model | MR SwitchBolt |
| Material | Receiver: 6061-T6 aircraft aluminum (per manufacturer specs); Barrel: tensioned aluminum; Stock: Luth-AR MCA-22 chassis-style polymer |
| Compatibility | .22 LR ammunition, standard Picatinny optics, threaded muzzle devices (1/2×28) |
| Finish | Black anodized receiver, black stock |
| Weight | Approximately 6.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- Tensioned aluminum barrel, 18 inches – Why it matters: reduces barrel whip and heat shift, keeping shots consistent even during rapid fire strings.
- Modular Luth-AR MCA-22 chassis stock – Why it matters: gives you adjustable length of pull and cheek riser height, so the rifle fits your body and shooting style.
- Left-side ambidextrous charging handle – Why it matters: allows quick cycling without breaking your grip or moving support hand, and it can be switched to the right side for left-handed shooters.
- Full-length Picatinny rail on receiver – Why it matters: mounts red dots, scopes, or night vision without needing aftermarket adapters, keeping your setup low and secure.
- Threaded muzzle with 1/2×28 threads – Why it matters: attaches suppressors or compensators directly, making it suppressor-ready right out of the box.
Who It’s For
This rifle is built for the hunter who wants a lightweight .22 for plinking at camp or taking squirrels on opening day. It also fits the shooter who trains with a rimfire to save on ammo but still wants a stock that adjusts like their centerfire rifle. If you’re a left-handed shooter looking for a semi-auto that doesn’t force a right-hand charging handle, this one’s ready to go.
Pros & Cons
- Pro: Adjustable chassis stock gives a custom fit without buying extra parts.
- Pro: Tensioned barrel holds accuracy even after a hundred rounds downrange.
- Pro: Ambidextrous charging handle works for both righties and lefties out of the box.
- Con: The polymer stock feels a bit light compared to aluminum chassis, but that keeps weight down for carry.
Comparison vs Competitors
| Feature | Magnum Research MR SwitchBolt | Geissele Super 700 | Timney Triggers Competition |
|---|---|---|---|
| Caliber | .22 LR | .308 Win | .308 Win |
| Barrel Length | 18 in (tensioned aluminum) | 20 in (steel, heavy profile) | 22 in (steel, fluted) |
| Stock Type | Luth-AR MCA-22 chassis (adjustable) | Fixed synthetic stock | Fixed synthetic stock |
| Weight | ~6.5 lbs | ~12 lbs | ~10 lbs |
| MSRP | $793.25 | $1,495 | $1,299 |
| Best For | Training, plinking, small game | Precision long-range | Benchrest competition |
FAQ
Can I mount a scope on the MR SwitchBolt without buying additional parts?
Yes. The receiver comes with a full-length Picatinny rail, so you can mount any scope or red dot that uses standard rings or a Picatinny base. No adapter needed.
Is the charging handle easy to switch for left-handed shooters?
Yes. It ships on the left side by default, but you can swap it to the right side in a few minutes using a hex key. The process is covered in the manual.
Does this rifle come with a threaded barrel for a suppressor?
Yes. The 18-inch barrel has a 1/2×28 threaded muzzle, so it’s ready for a suppressor or compensator right out of the box.
What kind of accuracy can I expect with this rifle?
Using quality .22 LR ammunition, most shooters report sub-1-inch groups at 50 yards from a rest. The tensioned barrel helps keep groups tight even during longer strings.
Ready to Buy
This Magnum Research MR SwitchBolt 22 LR 18 inch MCA-22 is in stock and ready to ship. It’s a solid choice for anyone who wants a rimfire trainer that adjusts to fit you, shoots consistently, and takes a suppressor without extra work. Check out our other Semi Auto Rifles or explore the full Rimfire Rifles category for more options. If you need optics, browse our Optics section to find the right scope or red dot.
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Last updated: April 2026
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