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Help installing compensator on AR

Discussion in 'Rifle Country' started by AR27, Aug 29, 2010.

  1. AR27

    AR27 Well-Known Member

    I have a dpms miculek compensator that i need info on how to install on my spikes m4 le. i have searched but not come up with much. I hear you cant just screw em on, they have to be lined up perfectly in order to work correctly. it includes an indexing jam nut, which i dont know how to use properly. can some one please point me in the right direction? -thanks
  2. esheato

    esheato Well-Known Member

    Brownells link

    You should either have a peel washer or a crush washer.

    Peel washer...peel layers off the washer until it indexs properly.

    Crush washer, crank it on until it indexs.

  3. M1key

    M1key Well-Known Member

    Thread jam nut all the way on, then do the same with the comp. Orient the comp in the proper position and tighten the jam nut against the back of the comp. I also like to use a little red loctite on the threads.

    Should look like this:

    Attached Files:

  4. MoDerN_WarRioR

    MoDerN_WarRioR Well-Known Member

    This is also the way I installed mine. Red Loctite is the way to go!
  5. jmorris

    jmorris Well-Known Member

    There is so much heat the red locktite won’t really do anything to help except when the barrel is cold, that is why it has a jam nut, other than that m1key has it right. If you did feel the need to put thread locker on you would have to go with something like the Rockset that AAC supplies with their suppressor mounts but again I have many thousands of rounds through my Miculek without any loosening. Also you should really try it out shooting, high speed, clocked at different angles. For example a little counter clockwise for a right handed shooter can counter the natural tendency for the rifle to recoil up and to the right better than level.
  6. M1key

    M1key Well-Known Member

    I have used ONLY red loctite on a few of my ARs to hold flash hiders and comps. The end of the barrel never gets hot enough to loosen them. Of course, I never get them smoking red-hot. Only way to get them off is heating with a propane torch. Difficult even then...

    Stock bedding compound works too.
    Last edited: Aug 30, 2010
  7. jmorris

    jmorris Well-Known Member

    I only use compensators on my 3 gun uppers so they get very hot. Shooting suppressed also retains a lot of heat, thus the rock set. Never had a problem with any flash hider backing off with a crush washer or peel washer.
  8. TonyAngel

    TonyAngel Well-Known Member

    That M4 is going to be LOUD with that comp on there. Have you ever shot a rig like that? Just want to make sure that you know. After putting it on, you may not like shooting the rifle much.

    I would suggest ear plugs and muffs for yourself and all of those around you.
  9. AR27

    AR27 Well-Known Member

    what is indexing and how do i do it? everyone keep saying that and i dont know what it means
  10. esheato

    esheato Well-Known Member

    Most barrel attachments have to be oriented properly to work the way they're supposed to work...ie, ports horizontal to ground.
  11. rcmodel

    rcmodel Member in memoriam

    Indexing simply means that the exhaust ports on the comp are pointed in the right direction when you get done tightening it in place.

    You don't want the ports pointing up & down when they are supposed to be pointing sideways.

    Same with a flash hider. The GI flash hider has one closed slot that goes on the bottom to stop blowing up dust when shooting low to the ground. It would not do that if you tighten it down and the blocked slot is on top or the side.

    "Clocking" a comp is another term you may hear.

    They can be clocked slightly from ports 90 degrees out the sides to counteract the rifling twist torquing the rifle sideways and off target.

  12. AR27

    AR27 Well-Known Member

    o ok, thanks all. it seems pretty simple
  13. wnycollector

    wnycollector Well-Known Member

    I wouldn't want to be the poor guy right next to him at the range! I passed on the miculek after standing near a guy shooting one at my club!
  14. 212327

    212327 New Member

    everyone at my range usually wears hearing and eye protection. all the time.
  15. 212327

    212327 New Member

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