Colt M4 Le6920 Upper Group 16In Stripped

The Colt M4 LE6920 upper group is a stripped upper receiver built on the proven reliability that defines Colt's rifle heritage. This 16-inch upper is engineered for shooters and builders who want a quality foundation for an AR-15 platform rifle—whether you're completing a lower receiver to form a complete rifle or swapping uppers on an existing build. With a chrome-lined, button-rifled barrel and 1/7 right-hand twist, it's a versatile setup suited to everything from mid-range precision to duty use.

Because this is a stripped upper, you'll need to source a bolt carrier group, charging handle, and rear backup sight separately to complete your build. That modularity is the point—you control which components go into your rifle and can spec it exactly how you want it. The chrome-lined barrel resists corrosion and extends barrel life, while the button rifling process delivers consistent accuracy. The 1/7 twist rate stabilizes a wide range of .223 Rem and 5.56 NATO ammunition weights, making it a stable all-around choice.

If you're new to AR builds or just want a trusted Colt upper without the premium of a fully assembled unit, this stripped configuration delivers the barrel and receiver quality Colt is known for—minus the markup for parts you might want to choose yourself. Check local and federal regulations before assembly; all NFA rules apply.

Key Features

• Chrome-lined barrel resists corrosion and extends service life
• Button-rifled barrel for consistent accuracy
• 1/7 right-hand twist stabilizes .223 Rem and 5.56 NATO across a broad weight range
• 16-inch barrel length
• Stripped configuration—no bolt carrier group, charging handle, or rear backup sight included
• Colt build quality and reliability

Specifications

Frequently Asked Questions

What do I need to complete this upper into a working rifle?

This is a stripped upper receiver, so you'll need to source a bolt carrier group, charging handle, and rear backup sight separately. You'll also need a lower receiver to complete the rifle. Check your local and state laws—NFA rules apply.

What ammunition does the 1/7 twist rate work with?

The 1/7 right-hand twist is designed to stabilize a wide range of .223 Remington and 5.56 NATO ammunition weights, making it versatile for most common loads.

Why is the barrel chrome-lined?

Chrome-lined barrels resist corrosion and heat damage, which extends barrel life and improves reliability in harsh conditions or high-round-count use. Button rifling ensures consistent accuracy.

Is this upper compatible with standard AR-15 lower receivers?

Yes, this is a standard AR-15 platform upper and will mate with any standard AR-15 lower receiver.