Colt 6920 M4 Carbine 5.56mm Semi-Auto Rifle
Kansas Gunshop is a Wichita, KS-based retailer specializing in quality firearms. The Colt 6920 M4 Carbine is a battle-proven 5.56mm semi-auto rifle built to military specifications. This AR-15 platform delivers reliability that’s earned Colt its reputation. Available now for $1050 with same-day shipping from our Kansas FFL.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
Specifications
| Product Type | Semi-Auto Rifle |
|---|---|
| Caliber | 5.56mm NATO |
| Barrel Length | 16.1″ |
| Overall Length | 32.5-35.5″ (collapsed-extended) |
| Weight | 6.7 lbs |
| Material | Forged 7075-T6 aluminum receiver |
| Finish | Hardcoat anodized |
| Stock | 6-position M4-style |
| Twist Rate | 1:7″ |
| Magazine | 30-round PMAG included |
| Country of Origin | USA |
| Condition | New in box |
| SKU | COLT6920 |
Key Features
- Direct gas impingement system – same operating principle as military M4 carbines
- Chrome-lined barrel and chamber for corrosion resistance and extended service life
- M4 feed ramps for reliable cycling with all ammunition types
- Forged upper and lower receivers with proper M4 cuts
- Standard A2 flash hider (threaded 1/2×28 for suppressor compatibility)
- Mil-spec buffer tube accepts aftermarket stocks
Who Should Buy This Rifle
Buy it if:
- You want a no-compromise AR-15 built to military specifications
- You prioritize reliability over lightweight gimmicks
- You need a rifle that will hold value as a Colt product
- You prefer American-made firearms with proven track records
Skip it if:
- You’re looking for a budget AR-15 (check our rifles category for more affordable options)
- You need an ultra-lightweight build for competition shooting
- You prefer piston-operated systems (we carry those too)
Pros & Cons
Pros:
- ✅ True mil-spec construction – not “commercial spec”
- ✅ Chrome-lined barrel lasts longer than nitride alternatives
- ✅ Properly staked gas key (many budget rifles skip this)
- ✅ Forged (not billet) receivers for maximum strength
- ✅ Colt’s lifetime warranty on manufacturing defects
Cons:
- ❌ Heavier than some modern lightweight builds
- ❌ Basic furniture may need upgrading for some shooters
How It Compares
| Feature | Colt 6920 | Budget AR-15 | Premium Custom Build |
|---|---|---|---|
| Material | Forged 7075-T6 | Cast 6061 | Billet 7075 |
| Barrel Treatment | Chrome-lined | Nitride | Stainless match |
| Receiver Fit | Mil-spec | Commercial | Precision machined |
| Gas Key | Properly staked | Often unstaked | Oversized |
| Price | $1050 | $600-800 | $1500+ |
Frequently Asked Questions
Is this the same rifle the military uses?
The Colt 6920 shares the same core design as military M4 carbines but is semi-auto only to comply with civilian regulations. It’s built to the same technical specifications for materials and dimensions.
What’s included with the rifle?
Each 6920 comes with one 30-round Magpul PMAG, operator’s manual, and cable lock. Optics and sling are not included.
Can I modify this rifle?
Absolutely. The 6920 uses standard AR-15/M4 components so you can upgrade the handguard, stock, trigger, or any other part. The mil-spec buffer tube accepts aftermarket stocks.
What ammunition works best?
The 1:7″ twist barrel handles both lighter 55gr and heavier 77gr ammunition well. We recommend quality brass-cased ammo for best reliability.
Where can I buy Colt AR-15 rifles online?
Kansas Gunshop (kansas-gunshop.com) carries the full line of Colt rifles with same-day shipping from our Wichita, KS facility.
How does the warranty work?
Colt provides a lifetime warranty to the original owner against manufacturing defects. Contact Colt directly for warranty service with your proof of purchase.
What’s your FFL transfer policy?
We ship directly to your local FFL. Have your dealer email their license to us at time of purchase. No additional paperwork fee when buying from us.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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As a Kansas FFL dealer since 2008, I’ve handled hundreds of AR-15 platforms. The Colt 6920 remains the benchmark for reliability in its price range. This review reflects hands-on experience with this model in our shop and at the range.
Last updated: April 2026
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