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Modern Materiel AR-15 5.56 SBF - 11.75"


In stock

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.

As low as $1,479.00
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This product ships from another warehouse location and is not available at our retail store. Orders will take an additional 2-3 business days for processing.


The Gen4 MODMAT PATROL SBF is the natural evolution of the super popular MODMAT SBF that was introduced in 2019 and the WARTIME SBF in 2021.  Like many COVID-era items that were born from supply chain disruptions, the WARTIME SBF was a collection of the best parts available at the time.  Now in 2023, those disruptions are gone for good and MODERN MATERIEL can finally re-introduce the entire PATROL SERIES including the SBF.



  • 100% MADE IN AMERICA.  All MODMAT firearms are made from domestic parts and assembled in New Jersey.
  • Multi-State and Federally compliant when purchased as an OTHER FIREARM.
  • CERAKOTE FINISH: Blackened Cobalt, Slate Grey Bloodshot Bronze, Patriot Brown, Sniper Green and Tackleberry Blue. 
  • Length: 27 3/8″
  • Weight: 5 lbs 3.4 oz
  • A2 Flash Hider.
  • MODERN MATERIEL Custom Profile, 11.75″ Carbine length AR15 Barrel. Machined from 4150 chrome moly, with M4 feed ramps and rifled with a 1:8 twist. Finished with H&M Blacknitride+™
  • MODERN MATERIEL .750” low profile gas block. Paired and custom pinned to the barrel. Processed with a Black Nitride corrosion resistant finish.
  • MODERN MATERIEL 10.75″ Duty Ready Gen4 free float hand guard – Full Picatinny top rail and M-LOK mounting in all positions.
  • Slate Black Industries – Slate Panels & Slate Vertical Grip (SVG).
  • Domestic 8620 M16 Bolt Carrier Group and 9310 bolt with QPQ corrosion resistant finish.
  • Radian Raptor SL charging handle for ambidextrous capabilities.
  • Radian Talon selector switch for ambidextrous capabilities.
  • MODERN MATERIEL Flattop Upper Receiver – 7075 T6 forged aluminum with ejection port cover, Mil-spec forward assist and brass deflector.
  • MODERN MATERIEL Lower Receiver – 7075 T6 forged aluminum with magwell texture.
  • HIPERFIRE Enhanced Trigger with 5.5 lbs pull for crisp and clean operation.
  • SPRINCO RECOIL SOLUTIONS tactical buffer (action) spring.
  • MODERN MATERIEL Receiver End Plate with QD Sling Swivel Socket.
  • B5 Systems TYPE 22 P-Grip with plug.
  • B5 Systems Polymer Trigger Guard.
  • One (1) MAGPUL magazine. 
More Information
SKU MM556-SBF-G4-11.75-DS
Product Type Firearm
Manufacturer Modern Materiel
Gas Block Diameter .750"
Thread Pitch 1/2x28
Twist Rate 1:8
Gas Length Carbine
Option AR-15
Barrel Length 11.75"
Caliber 5.56 NATO

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