Superlative Arms Adjustable Piston Conversion Kit – .625″


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Superlative Arms Adjustable Piston Conversion Kit - .625"

Piston Conversion Kit - Low Profile, Adjustable, Forward Venting "Bleed Off."

The Superlative Arms patented “Bleed Off”, Gas Adjustable Piston Conversion Kit / System 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.
  • Available in Pistol, Carbine, Mid-Length and/or Rifle Gas configuration.
  • Select your mounting style - Clamp-On or Solid (Set Screw).


  • Piston Block Assembly
  • Carrier - (Bolt Not Included)
  • (1) 3/32" x 6" Hex Key (Gas Screw Adjustment Tool)
  • (1) 9/64 x 6" Hex Key (Gas Block Plug Installation Tool)
  • (1) Bushing and insert tool (Extras - Use At Your Discretion)
  • Installation Instructions & QR Code for Video Tutorial
Manufacturer Superlative Arms
Attachment Type Clamp On | Set Screw - Solid
Made in America? Yes
Platform AR15
Barrel Diameter 0.625"
Gas System Pistol | Carbine | Mid-Length | Rifle
Adjustment Settings 30 Locked Positions (Front Adjustment)
Bleed Off Port Front of Block
Weight 13.1oz

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Weight 30 oz
Dimensions 17 × 3 × 2 in

Superlative Arms

Part Type

Upper Receiver Parts



Gas Block Diameter


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