Superlative Arms .750" Adjustable Set Screw Gas Block - Melonite

MSRP: $99.99
Our Price: $89.99
(You save $10.00 )
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Exclusively offered by Bexar Arms, all set screw style Superlative Arms gas blocks include a FREE set of our Knurled Set Screws!

The Superlative Arms patented “Bleed Off”, direct impingement, gas block for the AR15 platform adjusts the gas flow by bleeding the gas out of the block instead of restricting the flow like conventional adjustable blocks. Results:

  • The pressure used in the block is reduced only to the amount required to drive the bolt carrier. The remaining gas / pressure are bled out of the block allowing the system to run much cleaner and cooler.
  • Reduction of felt recoil.
  • Patented adjustment detent is located outside of the block and therefore no contamination.
  • The gas adjustment screw does not restrict the gas flow; therefore there is no erosion or seizing of the screw / no loss of detent due to carbon build up. Although it is removable, we have added a safety mechanism, which stops you from unintentionally backing the screw all the way out.
  • When using SBR’s and / or suppressors the bleed off port allows the excessive pressure to be exhausted out of the block reducing blow back.

Note from Phillip: The Superlative Arms gas blocks can be used in both a "restrictive" mode like other adjustable gas blocks, or in their unique "bleed off" mode. Depending on your usage, you may prefer the use of one mode over the other. A properly dimpled barrel is highly recommended for the most reliable installation of these gas blocks under hard use conditions.


  • Gas Block Material: 416 SS
  • Finish: Melonite, QPQ
  • Barrel Diameter: 0.750"
  • Weight: 1.68 oz.
  • Length: 1.00"
  • Attachment Type: Solid
  • Gas Adjustment:  (Patented) 30 Locked Positions, Front Of Block 
  • Bleed Off Port:  (Patented) Front Of Block


  • Gas Block - Assembled
  • (2) 10-32 x 1/4" Set Screws
  • (1) Gas Tube Roll Pin
  • (1) 3/32 X 6" L-Shaped Hex Keys
  • Installation Instructions
  • (1) FREE Bexar Arms Knurled Set Screw Pack!

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  • 5
    SA Gas Block .750

    Posted by Jordan on Apr 10th 2021

    This is a black set screw .750" adjustable gas block. Mounted up great, great price and looking forward to using it.