.750" Adjustable Piston System - Carbine Length - Solid - Melonited - Low Pro - AR15. Fits inside most AR15 handguards/rails. See drawing for exact dimensions.
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.
Patent pending 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.
Firearm Type: AR15
Gas Length: Carbine
Barrel Diameter: 0.750"
Weight: 13.1 oz.
Piston Block Attachment Type: Solid, Set Screw
Piston Block Material and Finish: 416 SS, Melonite
Carrier: Ion Bonded, 1 pc. Carrier w/ Skis and Dimpled Key
Gas Adjustment: (Patent Pending) 30 Locked Positions, Front Of Block
Bleed Off Port: (Patent Pending) Front Of Block
Piston Block Assembly
Carrier (bolt not included).
(1) 3/32" X 6" Hex Key (tool to adjust gas screw)
(1) 9/64" X 6" Hex key (tool to install/remove gas block plug)
(1) Bushing and insert tool (Just an extra.... we have had some requests. Use at your discretion).
Installation Instructions & QR Code For Video Tutorial
Awesome retro kit!
I installed this on Aero Precision's M4E1 upper. It's not a standard upper and I was basically limited to this kit for a piston upgrade. Turns out, this kit is bad ass!! Really easy to install and tune. In addition, the bleed off function is pretty incredible! Dramatically reduces recoil! Already referred a few buddies.