M4 CARBINE for Sale
Browse M4 CARBINE listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The M4 Carbine was developed in the early 1990s as a compact derivative of the M16 rifle for close quarters and rapid deployment. It combines lightweight design with modularity to suit diverse combat scenarios. Today, the M4 remains a primary service rifle for U.S. military and law enforcement worldwide.
Why It's a Top Choice
- Highly reliable under harsh conditions
- Modular with extensive accessory compatibility
- Lightweight and easy to maneuver
- Proven by decades of military use
- Wide aftermarket parts support
Key Variants
M4A1
Select-fire variant favored by special operations for full-auto capability and durability.
M4
Standard issue carbines for many U.S. forces prioritizing semi-auto and burst fire modes.
M4 SOPMOD
Special Operations variant with enhanced optics, suppressors, and accessories for versatility.
Competitor Comparison Table
| Feature | M4 Carbine | HK416 | FN SCAR |
|---|---|---|---|
| MSRP | $700 - $1200 | $2800 - $3500 | $3000 - $4000 |
| Capacity/Size | 30-round, 14.5\" barrel | 30-round, 14.5\" barrel | 20 or 30-round, 16.25\" barrel |
| Weight | 6.4 lbs (2.9 kg) | 7.9 lbs (3.6 kg) | 7.9 lbs (3.6 kg) |
| Optics-Ready | Yes, with Picatinny rail | Yes, integrated rail system | Yes, modular rails |
| Trigger Type | Single-stage, mil-spec | Single-stage, enhanced | Two-stage |
| Notable Pro | Lightweight and widely supported | Gas-piston system reduces fouling | Highly modular caliber options |
| Notable Con | Direct impingement can cause more fouling | Heavier than M4 | More expensive and heavier |
Best Use Cases
- Military and law enforcement duty
- Close quarters battle (CQB)
- Home defense and personal protection
- Range practice and training
- Modular platform for customization
FAQs
Can I use standard M16 magazines with the M4 Carbine?
Yes, the M4 Carbine accepts standard 30-round M16 magazines providing compatibility across platforms.
What is the barrel length of the M4 Carbine?
The standard M4 features a 14.5-inch barrel to balance compactness and effective range.
How does the M4 Carbine operate internally?
It uses a direct impingement gas system cycling the bolt carrier group to chamber rounds.
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