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Slr gas block, adjustable gas block, .750 adjustable gas block. .875 adjustable gas block

SLR Sentry adjustable gas block

The SLR gas blocks have been the best for us in terms of ease of use and durability. We run these gas blocks on all of our competition rifles, and have yet to have a gas block fail in anyway.


  • Sentry Clamp On Version – Melonite QPQ Finish
  • 15-position adjustability from 0 - .125" port opening
  • Gen-3
  • 1.3oz
  • 100% Gas seal allows full cut off and prevents gas from fouling metering screw
  • Complete disassembly is simple and take less than 10 seconds
  • Metering screw and screw bore design allows repeatability and reliability only SLR has been able to deliver
  • Single tool click to adjust gas metering
  • Melonite QPQ Finish 4140 Precision machined gas block
  • Melonite finish 4140 Nexturn Swiss precision metering screw
  • 1095 Laser Cut Spring Steel leaf spring
  • Melonite finsh 4140 detent plunger
  • NO tiny springs to corrode, break or seize / NO tiny ball to seize or get lost
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