Product Description
"M4 Commando" model designation engraved on the lower received with LE serial number prefix. Rare and limited availability government exclusive product.
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Caliber: 5.56x45mm NATO (.223 Remington compatible)
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Barrel: 11.5" heavy profile, chrome-lined, 1:7" right-hand twist, 6 grooves, A2 flash hider
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Upper Receiver: Monolithic design with full-length MIL-STD-1913 Picatinny rail for optics and accessories
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Lower Receiver: Colt mil-spec forged aluminum, marked “M4 Commando,” registered as an SBR
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Sights: Gas-block mounted fixed front sight post; Magpul folding rear backup iron sight (BUIS)
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Handguard: Heat guard sink system for enhanced cooling and grip
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Gas System: Carbine-length, direct impingement, gas port optimized for suppressed/unsuppressed use
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Charging Handle: Colt-branded ambidextrous charging handle
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Stock: B5 Bravo
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Finish: Black anodized, mil-spec
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Operation: Semi-automatic, closed bolt, air-cooled
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Weight: Approximately 7.4 lbs (unloaded, with stock)
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Length: 27.5" collapsed, 30.75" extended
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Magazine: Compatible with AR-15 STANAG, PMAG, and drum magazines (30-round PMAG included)
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Additional: M4 feed ramps, large heat sink on lower handguard, mil-spec nitrided bolt carrier group


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Colt IAR
The Colt IAR (Infantry Automatic Rifle) is what happens when a standard M4 decides to stop skipping leg day and starts eating its feelings in the form of heavy-profile barrels and heat sinks. It’s the "overachiever" of the Colt family—the one that showed up to the party with a massive radiator and enough stamina to make a marathon runner look like a couch potato. Here’s why the Colt IAR is the heavy-metal masterpiece you didn't know you needed. 1. The Barrel: Thicker Than a Bowl of Oatmeal The heart of the IAR is its massive, heavy-profile barrel. While standard carbines start sweating and losing their dignity after a few rapid-fire magazines, the IAR just stares at you, stone-cold, asking, "Is that all you've got?" It’s designed to handle sustained fire without turning into a literal noodle. If you ran out of ammo, you could probably use the barrel as a structural support beam for a small bridge. 2. The Heat Sink: Keeping it Cool Colt added a massive heat sink under the handguards because, apparently, "getting too hot" is for mortals. The benefit: You can keep shooting until your trigger finger gets a cramp. The downside: It weighs enough that your left arm will eventually look like it belongs to a professional arm wrestler, while your right arm stays normal. People will ask questions. 3. Accuracy: The "Magical" Paradox Usually, "Automatic Rifle" is code for "I’m going to spray lead in the general direction of that zip code." But the IAR is surprisingly precise. It’s like a marksman rifle that accidentally joined a heavy metal band. You can deliver surgical single shots, or you can flip the switch and provide enough "suppressive fire" to make sure nobody in the target area wants to be awake for the next forty minutes. 4. Reliability: The Colt Pedigree It’s a gas-piston-operated beast (in the 6940 series lineage), meaning it runs cleaner than a politician during election week. It’ll chew through brass like a hungry goat and keep on ticking. It’s built for the guy who thinks "maintenance" is something that happens to other people. The Verdict Pros: You can shoot forever without the handguards melting into your gloves. Doubles as a gym membership due to the weight. Inherently more "main character" energy than a standard AR-15. Cons: Your wallet will weep at the price of the ammo required to actually enjoy it. Carrying it on a long hike is a great way to discover exactly where your lower back is located. Final Thought: The Colt IAR is the perfect choice for the person who wants the reliability of a tank, the accuracy of a watchmaker, and the weight of a small sun.
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Colt IAR M4 Commando
Excellent design. Runs like a sewing machine. Heat sink works much better than expected. Highly recommend.
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Excellent hardware
New, Colt, Runs great. Really needs a class III lower to take advantage of the cooling functions. Runs nicely with a LPE suppressor
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Great gun
Arms unlimited is a great company never had an Issue or problem them. Typically you wait a few weeks before you buy something your eyeing it will go down in price. If ya don’t wait that’s your problem not theirs.