• BA 16″ SOCOM HBAR 4150 CMV
  • Black Nitride or Chrome Line Options
  • 1/7 Twist / 5.56mm Nato
  • Mid-length Gas system (.078 Gas port)
  • Riflespeed 7519 Gas Control
  • Red Right Hand’s Heat Mitigation System
  • Gunsmith level Assembly
  • Mil-spec Lapped Upper
  • Quality OEM Mil-spec components
  • Midwest Industries 10″ Combat Rail
  • A2 Bird Cage Flash Hider




Infantry Automatic Rifleman is a concept adopted and used by the USMC. Light weight, accurate and capable of handling heat associated with the role of Auto-Rifleman. The M27 has become a beloved weapon in the Marine corps arsenal. This is our DI version of that upper.

Our goal was to create a version of the M27 IAR upper that would address issues with the M27, addressing heat and building in the ability to tune the upper for better performance with Suppressors.

We designed our Heat Mitigation System to fit a 16″ Mid-length SOCOM HBar barrel and straight gas tube. Just like our RECCE LMG upper line, the IAR v1’s barrel and gas system is incased with our 6061 Aluminum Heats Sinks and Copper/Nickel Alloy gas tube Heat Sink.

The SOCOM hbar paired with our HMS system is a game changer, in testing we have seen insane numbers of heat reduction. Effectively putting this upper comfortably into the Auto-rifleman role without sacrificing accuracy or reliability of the system.

Equipped with the excellent Riflespeed Gas Controls, this upper is easily tuned for ammo, suppressor choice, buffer weights etc. Extremely capable of adapting to any use you see fit. Duty grade, Rugged, Tool free adjustment, and minimal maintenance required, Riflespeed is the best choice for Adjustable Gas blocks bar none.


We build these uppers in batches. All Orders placed after 9/10/2023 are “pre-orders” for the next batch.

The next batch is IN-Production (Sep, 2023) with an expected date to ship (Late October 2023). Buy with confidence, the next ones are coming very soon! Pre-Ordering your Red Right Hand IAR upper allocates yours from the batch, and Helps our small company greatly.

Weight 7.5 lbs


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