Superlative Arms Adjustable Piston Conversion Kit – .750″

Superlative Arms Adjustable Piston Conversion Kit – .750″

$289.99 $260.99

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Superlative Arms Adjustable Piston Conversion Kit – .750″

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). 

* Buy the Conversion Kit for .625 Barrels here*

*Toolcraft AR15 Bolt Kits – Sold Here*



  • 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


Product Information

Manufacturer: Superlative Arms
Item #: SABO-PS-750
Platform: AR15
Barrel Diameter: 0.750″
Weight: 13.1oz
Gas System:  Pistol | Carbine | Mid Length | Rifle
Piston Block Attachment Type: Solid (Set Screw) | Clamp-on
Piston Block Material & Finish: 416 SS, Melonite
Carrier:  Ion Bond, 1pc. Carrier w/ Skis and Dimpled Key
Gas Adjustment:  30 Locked Positions (Front Adjust)
Bleed Off Port:  Front of Block
MSRP: $289.99

Arm or Ally is a stocking dealer for  Aero Precision, Faxon, Polymer80, Ballistic AdvantageToolcraft, SB Tactical, Holosun and more. See our growing inventory of AR Parts, Firearms and Reloading Components.

Additional information

Weight 30 oz
Dimensions 17 × 2 in

Superlative Arms

Part Type

Upper Receiver Parts



Gas Block Diameter