M4A1 for Sale
Browse M4A1 listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The M4A1 carbine originated as a compact evolution of the M16 rifle, adopted by the U.S. military in the 1990s. It emphasizes modularity and reliability for close-quarters and general combat roles. Today, the M4A1 remains one of the most widely used and versatile carbines worldwide in military and law enforcement.
Why It's a Top Choice
- Proven reliable in diverse combat environments
- Highly modular with extensive aftermarket support
- Lightweight and compact for close-quarters use
- Compatible with a wide range of optics and accessories
- Standard issue for many military units globally
Key Variants
M4A1 SOPMOD
Equipped with advanced optics and accessories for special operations forces.
M4A1 Block I
Baseline variant widely issued with improved barrel and fire control components.
M4A1 CQBR
Close-quarters battle rifle variant with a shorter barrel for urban engagements.
Competitor Comparison Table
| Feature | M4a1 | Hk416 | Fn Scar |
|---|---|---|---|
| MSRP | Varies by manufacturer and configuration | $3,000+ | $3,200+ |
| Capacity/Size | 30 rounds, 14.5\" barrel | 30 rounds, 16.5\" barrel | 20/30 rounds, 16.25\" barrel |
| Weight | ~6.5 lbs (2.95 kg) | ~7.9 lbs (3.6 kg) | ~7.9 lbs (3.6 kg) |
| Optics-Ready | Standard Picatinny rail | Monolithic rail system | Top Picatinny rail |
| Trigger Type | Mil-Spec single-stage | Single or two-stage (varies) | Single-stage consistent pull |
| Notable Pro | Extensive parts availability | Enhanced piston system | Modular caliber options |
| Notable Con | Direct impingement gas system | Heavier weight | Higher price point |
Best Use Cases
- Military and law enforcement duty
- Home and self-defense
- Sport shooting and training
- Close quarters and urban combat
- Collector interest for modern carbines
FAQs
Can I use standard AR-15 magazines with the M4A1?
Yes, the M4A1 accepts standard 5.56x45mm NATO AR-15 magazines due to shared magazine well dimensions.
What is the effective range of the M4A1 carbine?
The M4A1 is effective up to 500 meters for individual targets, consistent with its 14.5-inch barrel and caliber.
How does the M4A1 differ from the M16 rifle?
The M4A1 is shorter, lighter, with a collapsible stock and selective fire, optimized for close quarters compared to the longer M16.
Prefer nearby results? Toggle to search local listings.
Daniel Defense DD4 M4A1 RIII - 5.56 - 14
$2,429.00
Daniel Defense DDM4 M4A1 15126011
$2,447.99
Daniel Defense DDM4 M4A1 15126011
$2,432.00
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