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Quick Look
The M40A3 is a modern iteration of the US Marine Corps' M40 sniper rifle lineage, first fielded in the 1960s. Built on the Remington 700 long-action, the A3 emphasizes rugged precision for combat reliability. Though replaced in service by newer platforms, it remains popular among collectors and precision shooters.
Why It's a Top Choice
- Combat-proven bolt-action precision rifle
- Heavy-profile match-grade barrel for accuracy
- McMillan A4-style fiberglass stock enhances stability
- Reliable short-action configuration with manual control
- Excellent platform for long-range marksmanship training
Key Variants
M40A1
First fiberglass-stocked evolution with improved scope mounts for Marine sniper use.
M40A5
Updated with detachable box magazine and suppressor-ready barrel.
M40A6
Modern chassis system and modular upgrades over A3 and A5 predecessors.
Competitor Comparison Table
| Feature | M40A3 | Remington 700 | Tikka T3x TAC A1 |
|---|---|---|---|
| MSRP | $3,500+ | $1,000+ | $1,800+ |
| Capacity | 5 rounds, internal | Varies by config | 10-round mag |
| Weight | 14+ lbs scoped | 9-11 lbs scoped | 11.5 lbs |
| Optics-Ready | Yes | Yes | Yes |
| Trigger Type | Match-grade single-stage | Adjustable | Two-stage |
| Notable Pro | Military-proven reliability | Extensive aftermarket | Modular chassis design |
| Notable Con | Heavy and non-mag fed | Requires mods for match use | Less fielded in military roles |
Best Use Cases
- Precision long-range shooting
- Historic military collection
- Sniper school-style training
- Benchrest and prone target practice
FAQs
What is the M40A3 chambered in?
The M40A3 is chambered in 7.62x51mm NATO (.308 Winchester), optimized for sniper precision.
Can I buy a civilian version of the M40A3?
Yes, several builders offer M40A3-style rifles based on Remington 700 actions for civilian purchase.
How does the M40A3 compare to newer sniper platforms?
While extremely accurate, the M40A3 lacks modern modularity and magazine-fed ergonomics found in newer designs.
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