In the United States, the opportunity to own modern arms in European specifications doesn’t present itself too often. Arms Unlimited Inc. has made the Colt CR6920-EC carbines available to collectors. Less than 400 of these carbines shipped to Arms Unlimited in April of 2023.
The Colt CR6920-EC carbines are European CIP compliant. CIP is the European equivalent of the U.S. SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) standards and translates to Permanent International Commission for the Proof of Small Arms.
A few things that make these firearms somewhat unique on the U.S. market are:
- Caliber .223
- Lower receiver and upper receiver are serial numbered
- Major components are marked with US (country of manufacture) and 23 (year of manufacture).
- Bolt carrier is serial numbered
- Bolt is serial numbered
The Colt CR6920-EC is packed in Colt’s usual long gun cardboard box.

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The accessory kit included with the CR6920-EC consists of the following:
- Magpul Gen 3 10-round magazine
- Colt AR-15 owners manual (English version)
- Gun lock

This is an instance where the barrier bag date is nowhere near the production date of the firearm. The firearm was made in 2023.
The CR6920-EC features a standard composite carbine collapsible stock, A2 pistol grip, Magpul MBUS back-up sight, double heatshield handguards, fixed front sight and standard government profile 16″ barrel with A2 flash hider.



In the image below, you get your first glimpse of the firearm serial number on the bolt carrier group.








Below is a close-up look at the barrel markings which read ” C MP 223 REM 1/7 “

Beginning with the image below, we start to take a look at the left side of the CR6920-EC. If you look real close, you can see the firearm serial number engraved between the front sight base and the M203 grenade launcher recess on the barrel.

In the image below, unique lower receiver and upper receiver markings become visible. On the lower receiver is the US23 marking which indicates the United States as the country of manufacture and 2023 as the year of manufacture.
Added to the upper receiver is Colt Carbine US23 and the serial number











In the image below of the right side of the carbine, you can see the Cerro Forge mark (Key hole) and the ‘Fire’ and ‘Safe’ markings at the selector.






In the image below of the right side of the stock, there are three different points of reference.
- Stock manufacturer CAGE code of 8FW25. The CAGE code belongs to Prudent American Technologies.
- There is an ‘I’ about an inch left of the CAGE code
- Made In USA





In the image below, you see the serial number on both the bolt carrier and the bolt.

In this top quarter image of the bolt carrier, you get a good look at the uniform staking of the carrier key screws that Colt is famous for.

The charging handle is a standard charging handle with no markings visible.



Overall, this carbine is just a standard Colt CR6920. The .223 caliber and the unique markings are what makes this stand out and attractive to a collector. I would not recommend purchasing this firearm as a shooter although the lower price of it may make someone tempted to.
This is a great opportunity to add a unique model to your collection.



























And a hearty THANK YOU for yet another of your continuing reviews of the ever changing Colt Carbine Series !! Sadly, I haven’t seem fit to purchase any of the recent Colt versions, but I always appreciate the opportunity to enjoy your excellent overviews of them, along with many other interesting & related Colt products.
Best regards, Dom Pastore Jr. / ‘dpast32’
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Thank you for stopping by.
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I picked one of these up and it was indeed as interesting as you described. It shipped really fast and the transaction went nicely. Thanks for the tip. I like this rifle and will probably pick up another to put back. I have another older Colt European Export Rifle in .222 REM from 1985. (Military rounds were prohibited there) It is like the SP-1 but with the tear-drop forward assist mostly. It’s marked as an AR-15A2 but the only A2 features are the butt stock and flash hider. It has triangular hand guards and 1:12 twist. Magazines are marked 222 REM but are dimensionally the same as 5.56. The rifle was made before the last SP-1 left the factory and is in the 22128xx range. It is a very interesting old rifle in pretty much new condition. These old Colt oddities meant for Europe are interesting and unusual items in the US it seems.
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I made a typo on serial number of old .222 European Colt. Should be 2128xx range.
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Since it is marked .223 Remington, can it use 5.56 Mil Spec ammunition?
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A .223 can chamber and fire 5.56mm ammunition. However, a .223 chamber is dimensionally smaller. 5.56mm fires at higher chamber pressures which can potentially cause damage to the firearm and the firer.
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Thanks for your response. I should have worded my question differently. I have many Colt manufactured AR/M4 type rifles. All are marked 5.56 and they can fire MILSPEC higher pressure ammunition. Since my CR6920 EC is marked in “.223 Remington,” I was wondering if it could fire the 5.56 round as the EC with the SIP markings was just a cosmetic change and Colt used the same M4 barrels when they produced the Colt CR6920-EC. Production wise, it would have made sense to use the same barrels.
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The barrels and chambers on the EC’s are .223. Neither component is 5.56.
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