DEMO Adams Arms P Series Micro Adjustable Block Piston Kit - Low Mass Carrier Black Carbine Length. These AR15 Upper Parts brought to you by Adams Arms are self-cleaning to ensure they don't degrade over time. Plus each Adams Arms P Series Micro Block Carbine Length Piston Bundle is coated to ensure resistance to corrosion. Since these piston systems don't vent directly to atmospheric pressure there's no flash signature which helps you stay concealed in the field. Trust the Adams Arms P Series Micro Block Carbine Length Free Floating Piston Kit to improve the quality and performance of your weapon. Please note that the Receiving Bushing and Installation Dowell are no longer included.. Specifications for Adams Arms P Series Micro Block Carbine Length Piston Kit: Manufacturer: Adams Arms Finish: Black Length: Carbine Additional Features: Adjustable Low Mass Carrier Condition: Factory DEMO Condition Quality: Like New Condition Details: Open Box Features of Adams Arms P Series Micro Block Carbine Length Piston Kit: A short stroke free floating piston system Self-Cleaning Carbon and gases are expelled forward away from operator Corrosive resistant coating processes Harmonics are not transferred into the barrel Doesn't vent directly to atmospheric pressure; this eliminates flash signature and super sonic crack which is optimal for night vision and suppresses fire Lifetime Warranty Our Piston Kits No Longer Require the Receiver Bushing or Installation Dowel Package Contents: Adams Arms P Series Micro Block Carbine Length Piston Kit P Series Micro Block - Adjustable (5 Settings - 100percent/74percent/53percent/32percent/11percent) Bolt Spring Drive Rod with Bushing and Spring Installation Instruction Card Adams Arms FGAA-03204: P Series Micro Adjustable Block Piston Kit - Low Mass Carrier Black Carbine Length