The Daniel Defense M4A1 SOCOM Block II Upper Receiver has been designed for those looking to match the specs and performance on the M4A1 SOCOM Block II carbines used by troops during Operations Iraqi Freedom and Enduring Freedom. The Daniel Defense M4A1 SOCOM Block II Upper Receiver features a quad-rail handguard equipped with a Picatinny-compatible rail sections. The barrel is cold hammer forged from mil-spec chrome-moly vanadium steel and features a SOCOM, heavy profile, with a chrome-lined interior, matching military-style barrels with the same construction. The gas block is a Daniel Defense pinned low profile block, the same as the current generation provided to SOCOM. Mfg: Daniel Defense
DPMS M-Lok 5.56x45mm NATO 16 inch Upper Receiver One Size
Original price was: $449.99.$371.88Current price is: $371.88.
CMMG Mk4 6.5 Grendel Resolute Upper Group Receiver 16.1in Coyote Tan
Original price was: $949.95.$819.99Current price is: $819.99.
M4a1 Stripped Socom Upper Receiver 14.5in 5.56 – M4a1 Socom Block Ii 5.56 Stripped Upper 14.5”” Bbl
Original price was: $899.99.$809.99Current price is: $809.99. 
Superior Specs. Ultimate Performance.

