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piston

A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines, the piston also acts as a valve by covering and uncovering ports in the cylinder wall.

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Recent contents
  1. USMC1911

    WTB OR  AR piston kit and 10.5 barrel

    Looking to buy a AR carbine length piston kit and a quality 10.5 or possibly 7.5 barrel in 5.56 or .223 wylde. :s0031:
  2. CIBKais

    WTS OR  Adams Arms AR-15 Piston Driven 5.56/.223 16" Complete Upper +

      1. For Sale
    • $550
    • North Plains
    • Oregon
    Hi all, Selling my Adams Arms Mid Length Gas System AR-15. This was a project I did when I got home from my last deployment. I built it as a truck gun that would take a ton of abuse/dirt and still fire which is why I went with the Troy Battle Sights and a piston system.This is a complete...
  3. Camelfilter

    WTS OR  Adams Arms 7.5” 5.56 Tactical Evo piston complete upper.

    -SOLD, THANKS!- $450. Pick up in Salem/Keizer, will not ship, ad will be closed once sold. Use the conversation function. Adams Arms 5.56 7.5” Tactical Evo piston complete upper. Includes BCG, charging handle, dust cover, angled fore grip & a mounted sling quick disconnect. No sights...
  4. M

    WTS/WTT WA  Adams Arms Tactical Elite Piston AR15

    I have a really nice Adams Arms Tactical Elite Carbine 16" Piston AR15 for sale or trade. It has a ton of great features and upgraded aftermarket parts including -Forged 7075-T6 M4 flattop Upper Receiver with Type III Class II Hard coat anodized finish, M4 feed ramps,1913 picatinny rails and...
  5. G

    WTS WA  M1 Carbine Piston Wrench & Bolt Tool

    Sold
  6. kod38

    WTS OR  Piston #13

    This is a new Honda 4 cyl Piston Approx 2.5 x 3” Carved skull and polished $56 free shipping PayPal
  7. kod38

    WTS OR  Piston #9

    This is piston #9 up for grabs I put the compression rings on, they come off easy if you don’t like em on. This one is approx 2” tall and 3” diameter. $60 free shipping $55 ftf PayPal ok Thank you for looking
  8. kod38

    WTS OR  Piston #10

    Hey guys, I just finished piston 10 This one is 2 1/4 x 3” Honda Piston. $60 free Priority Mail shipping PayPal ok $54 ftf Keizer/Salem Thanks for looking
  9. kod38

    WTS OR  Piston guy #6

    Going to relist at later date , needed some more work I thought.
  10. kod38

    WTS OR  Carved piston faces

    testing the waters. I have 2 pistons up for sale. $45 each your pick ftf or Ad $5 if you want it shipped. These are 4 cyl car engine pistons I have carved up for loading bench, garage, man-cave, etc I live in Keizer Thank you. I will be doing more of these soon. No 2 will match, all free hand.
  11. M

    WTS/WTT OR  Adams arms carbine length retro fit piston system

    I don't know much about it, I took it on trade. Does show some use. Its not my flavor and I'm tired of looking at it. BCG is complete. The ones I've seen new typically aren't. I just discovered that it is missing the drive rod bushing, it goes where the di gas tube goes through to keep the drive...
  12. kod38

    Carved my first piston

    I have had this old 550 jetski piston for 18 years and finally did something with it. First attempt, now I gotta find more pistons. Hope you like it
  13. dieselforever

    WTS/WTT OR  Adams Arms/Aero Precision gas piston upper 16" 5.56 NATO/.223

    This Adams Arms gas piston upper was built personally by Curt Foley, the owner of Curt's Discount Shooters' Supply in Milwaukie. It is an Aero Precision / SSA upper and barrel, American flag on top of the receiver, 16" barrel, 1:9 twist rate, M4 profile, chrome lined, M4 feedramps, 5.56 NATO...
  14. dieselforever

    WTS OR  Adams Arms gas piston upper 16"

    This Adams Arms gas piston upper was built personally by Curt Foley, the owner of Curt's Discount Shooters' Supply in Milwaukie. It is an Aero Precision / SSA upper and barrel, American flag on top of the receiver, 16" barrel, 1:9 twist rate, M4 profile, chrome lined, M4 feedramps, 5.56 NATO...
  15. XDMman

    WTS OR  Adams Arms Tactical Elite AR-15 Gas Piston Upper

    Adams Arms tactical elite carbine length gas piston ar-15 upper. Has tan troy battle sights, samson rail and pws flash suppressing compensator. $550obo
  16. T

    WTS/WTT OR  Rock River Arms LAR-PDS pistol in 5.56

    sold
  17. songmeesay

    WTS OR  RARE PWS MK110 MOD 0 10.75" complete piston upper

    I bought this upper from the original owner last week and honestly it was in an impulse buy as a back up to my PWS Diablo. Original owner said he put about 1000-1500 rounds through and I haven't put any through. The upper is chambered in 5.56 and in good condition and comes with a PWS flash...
  18. RedneckRampage

    WTS/WTT OR  Daniel Defense Piston Omega 7.0

    Great condition DD Piston Omega 7.0 Carbine length drop in free float rail. Works on piston and DI rifles, only difference from the regular Omega is that the top section is easily removable to allow access to the piston. Asking $160 shipped, net to me.
  19. koas44

    WTS OR  LMT CQB MRP Piston Ar15 upgraded

    Sold
  20. P

    WTS/WTT OR  Silencerco Piston Sig/HK 9mm

    Hello, and thanks for taking a look. I have an extra M13.5x1LH silencerco piston for trade or sale. Works for HK and Sig 9mm, as well as others. Trade is preferred. I would like to trade for a standard 9mm piston (1/2 x 28) if possible. Feel free to email me at [email protected]. I have...
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