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Quick Look

The Colt XM177E2 Retro Carbine originated in the late 1960s as a compact variant of the M16 designed for close-quarters combat. It emphasizes maneuverability and enhanced firepower in a lightweight platform. Today, it holds strong appeal among collectors and military firearm enthusiasts.

Why It's a Top Choice

Compact design ideal for close-quarters
Reliable gas-operated system proven in combat
Iconic military heritage from Vietnam War era
Strong aftermarket support for parts and accessories
Semi-auto variants popular for civilian collectors

Key Variants

Colt XM177E2 Retro Carbine

Designed for special forces needing compact, reliable carbines in dense environments.

XM177E1

Early short-barrel model, precursor to the E2, used in Vietnam engagements.

M4 Carbine

Modern evolution with enhanced modularity and accessory compatibility.

Competitor Comparison Table

Feature	Colt XM177E2 Retro Carbine	M4 Carbine	HK416
MSRP	Varies (collector pricing)	Approx. $900 - $1,200	$3,000+
Capacity/Size	30-round 5.56 NATO, 10.3-inch barrel	30-round 5.56 NATO, 14.5-inch barrel	30-round 5.56 NATO, 14.5-inch barrel
Weight	Approx. 5.5 lbs	Approx. 6.5 lbs	Approx. 7.9 lbs
Optics-Ready	Basic iron sights, aftermarket optics possible	Picatinny rail for scopes/optics	Integrated Picatinny rail system
Trigger Type	Single-stage military trigger	Single-stage/Mil-Spec trigger	Enhanced two-stage trigger
Notable Pro	Historic design with combat-proven reliability	Highly modular with modern upgrades	Superior piston-driven system, less fouling
Notable Con	Limited factory optics integration	Heavier than XM177E2	Higher cost and weight

Best Use Cases

Military and tactical close-quarters combat training
Collector interest for classic military carbines
Self-defense with compact rifle platform
Range shooting and marksmanship practice
Historical reenactments and demonstration

FAQs

Can I use standard 5.56 NATO magazines with the Colt XM177E2 Retro Carbine?

Yes, the XM177E2 accepts standard 30-round STANAG magazines chambered in 5.56 NATO.

What is the barrel length of the Colt XM177E2 Retro Carbine?

The XM177E2 features a 10.3-inch barrel optimized for compactness and maneuverability.

How does the Colt XM177E2 differ from the M4 Carbine?

The XM177E2 has a shorter barrel and lacks the modular rail system standard on the M4.

COLT XM177E2 RETRO CARBINE for Sale