Ops-Core Sentry XP Mid Cut Ballistic Helmet

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Ops-Core Sentry XP Mid Cut Ballistic Helmet


The Sentry offers the same level of protective head coverage as the US Army ACH/ECH with improved interoperability between communication headsets, visors, and accessories for mandible protection. It also provides better hearing localization and attenuation than the ACH with a modified ear area shape, and is compatible with ARC Rail mounted COMMs and hearing protection devices.


  • Completely redesigned full ear helmet solution
  • The “XP” version of the shell is built using hybrid composite ballistic materials that weigh a ½ lb less than the ACH while meeting all of the ballistic performance requirements of the US Army’s CO/PD-05-04 2007 specification
  • The Worm-Dial adjustable fitband with replaceable front, nape, and side pads quickly detaches to allow convenient donning / doffing of COMMs headsets with headbands while being more compact than the Occ-Dial version used in the FAST helmet models
  • The ventilated multi-impact liner has repositionable EPP impact pads and LDV closed-cell comfort foam that is not affected by temperature, altitude, or moisture
  • Gives helmet 4x more stability than standard issue ACH helmet suspension / retention products
  • Sentry has additional ballistic capability with ballistic Moto Mandible and ballistic Moto Visor
  • Compatible with headband COMMs and external rail-mounted COMMS like the RAC headset
  • Same ARC and bungee benefits as the FAST Helmet
  • Ops-Core Shroud included on the helmet: compatible with front mount visors, flashlights and other visual enhancement devices


  • Weight:
    • M: 1.92 lbs.
    • L: 2.03 lbs.
    • XL: 2.11 lbs.
  • Helmet Sizing Circumference (inches):
    • M: (20 7/8-22 1/2″)
    • L: (22 1/2 – 23 1/4")
    • XL: (23 1/4 – 24″)
  • Head Size:
    • M: (up to 7 1/8)
    • L: (up to 7 3/8)
    • XL: (up to 7 5/8)
  • Chinstrap:
    • M= Medium Chinstrap
    • L= Large Chinstrap
    • XL= X-Large Chinstrap
  • Impact Protection: CE EN 1385 & ASTM F1492 U.S. Army – ACH Specification: Chinstrap Retention & Non Ballistic Impact Protection
    • Less than 150 G’s of Force Imparted to Head w/ Multiple Impacts up to 10fps
    • Less than 200 G’s of Force Imparted to Head w/ Multiple Impacts up to 14fps

Ballistic Protection:

  • 2-Grain (V50): 4200 f/s (1280 m/s)
  • 4-Grain (V50): 3475 f/s (1059 m/s)
  • 16 Grain (V50): 2475 f/s (754 m/s)
  • 64 Grain (V50): 1750 f/s (533 m/s)
  • 17 Grain / 1.1 FSP (V50): 2200 f/s (670 m/s)
  • 9mm FMJ RN: 1400 f/s (427 m/s) – BFD < 1.0″