DR Action Video! Colt IAR (Infantry Automatic Rifle) 5.56mm NATO Mag-Fed AR: Light Machine Gun/Squad Automatic Weapon (LMG) Proposed Replacement Fired on Full-Auto at the Range!
All photos and video clips contained in this article were shot by DefenseReview.com (DR), and are copyrighted. DefenseReview.com owns the copyright on these materials. The photos and video clips were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability).
The Colt IAR is essentially a 5.56x45mm NATO (5.56mm NATO)/.223 Rem. select-fire mag-fed AR that’s a proposed light machine gun replacement weapon. It operates via direct gas impingement (DGI) and utilizes a heat sink to reduce barrel heating under extended full-auto fire. Defense Review first covered the Colt IAR in late October 2008.
The Colt IAR has a pretty high cyclic rate of fire (ROF) that would appear to be in the 900-950 rpm range, causing the weapon to give the shooter a constant solid push backward during sustained full-auto fire. You can see this effect in the second Colt IAR video, below. Muzzle rise during full-auto fire is negligible to non-existent, though.
DefenseReview doesn’t know how reliable, accurate, and durable the Colt IAR is under adverse conditions and high round count. DR would be interested in conducting a side-by-side comparitive test between the Colt IAR and FERFRANS HVLAR (High Volume Light Automatic Rifle a.k.a. High Volume Light Assault Rifle), which is gas piston/op-rod-driven and utilizes the patented Ferfrans RRS/DSAS (Rate Reduction System/Delayed Sear Activation System) to lower the cyclic rate of fire (ROF) below 700 rpm for enhanced full-auto controllability and weapon life. Hopefully, we can make the side-by-side comparison test happen, at some point.
DR Action Video! Colt IAR (Infantry Automatic Rifle) 5.56mm NATO Mag-Fed AR: Light Machine Gun/Squad Automatic Weapon (LMG) Proposed Replacement Fired on Full-Auto at the Range!
by David Crane
About David Crane
David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.