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Quick Look

The M4 rifle originated as a compact derivative of the M16, designed by Colt in the early 1990s for enhanced maneuverability. Its design focuses on versatility and modularity for diverse combat roles. Today, it remains a standard issue carbine for U.S. military forces and many allied units worldwide.

Why It's a Top Choice

Highly reliable under harsh conditions
Modular platform for accessories and optics
Lightweight and compact for close quarters
Proven accuracy with 5.56mm NATO round
Wide aftermarket support for customization

Key Variants

M4A1

Enhanced full-auto select-fire version favored by special operations for rapid tactical engagement.

M4 Commando

Shorter barrel variant optimized for tight spaces and urban operations.

M4 Carbine

Standard infantry rifle balancing range and mobility.

Competitor Comparison Table

Feature	M4 Rifle	Hk416	Fn Scar
MSRP	$700–$1,000+	$2,500–$3,000+	$2,000–$3,000+
Capacity / Size	30-round magazines, 14.5\" barrel	30-round mags, 14.5\" barrel	20 or 30-round, 16.25\" barrel
Weight	6.5 lbs empty	7.9 lbs empty	7.9 lbs empty
Optics-Ready	Yes, flat top rail	Yes, integrated rail	Yes, modular rails
Trigger Type	Standard military trigger	Enhanced match trigger	Two-stage trigger
Notable Pro	Widely adopted, proven platform	Improved reliability in adverse conditions	Modular and ambidextrous controls
Notable Con	Requires regular maintenance	Higher cost	Heavier than M4

Best Use Cases

Military and law enforcement duty
Close quarters combat and urban warfare
Range training and marksmanship
Home defense
Tactical competition shooting

FAQs

Can I customize the M4 rifle for optics?

Yes, the M4 features a flat top upper receiver with a Picatinny rail, supporting various optics and sighting systems.

What is the standard caliber of the M4 rifle?

The M4 rifle is chambered in 5.56x45mm NATO, standard for U.S. military assault rifles since the 1990s.

How does the M4 compare in weight to the HK416?

The M4 weighs approximately 6.5 pounds empty, while the HK416 is heavier at about 7.9 pounds empty due to its piston-driven system.

M4 RIFLE for Sale