M4 Carbine Improvements Rail System & BUIS Standard configuration
M68 CCO
Required Reliability MRBS – 600 MRBF – 3,800
Improved Extractor Spring
Picatinny Rail & Pistol Grip TC
Back up Iron Sight
SOCOM M4A1 Introduced w/ 5 Major Improvements
Improved Feed Ramps
Squad Designated Marksman Bipod
Obtain Government Purpose Rights to Compete TDP
2008 2007
PEQ/2
Improved Magazine Design Approved (Fielding JUL 2009)
2005 2003
Improved Butt stock
2001 2000 Advanced
1997 1996 1991
RFI Fielded TA31F RCO-M4 Combat Optic (RCO)
2009
2006
1998
1995
M150, Rifle Combat Optic (RCO)
Baseline Reliability Test Demonstrated MRBS – 3,592 MRBF – 6,076
M4 Carbine
Combat Optic & Enhanced Stock
Forward Grip/Bipod
Improved Bolt & Extractor Spring Improved Adapter Rail (prevents improper install)
Tactical Sling
Improved Weapons Cleaning Kit
Multi Magazine Holder with Pouch
Total: 62 ECPs to M4
Forward Rails
PM Soldier Weapons’ Continuous Improvement Process
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