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What would it take to change the stock on a Colt M4gery?

Discussion in 'Rifle Country' started by Kestrel, Nov 11, 2003.

  1. Kestrel

    Kestrel Well-Known Member

    On the Colt "Match Target M4" (civilian), what would it take to replace the fake collapsible stock with a fixed Colt A2 stock?

  2. Sydwaiz

    Sydwaiz Well-Known Member

    A spanner wrench and a screwdriver.

    Sorry, couldn't resist even if it is my first post here!

    So you just want to remove the buttstock and replace it with a normal one? First, remove buffer and spring. You'll need a CAR stock removal tool otherwise known as a CAR spanner wrench to remove the current stock. Do you see the ring with little holes in it on the buttstock tube up next to the receiver? The spanner wrench is for that. When you get it loose, slide the little plate aft but watch out for the spring behind it that is for the takedown pin. Once the plate is clear of the receiver, simply rotate stock to unscrew.

    To attach new stock. Screw buffer tube into receiver and tighten. Make sure spacer is inside A2 stock before sliding stock onto buffer tube. As you slide stock onto buffer tube make sure detent spring is where it should be, in the receiver and not on the floor somewhere! While holding stoclk against receiver to keep spring from ending up on floor again, tighten screw at rear of stock into the buffer tube. Insert A2 buffer and spring if different from CAR buffer and blast away!

    note: I believe some fixed collapsible stocks used standard buffers so you may already have the right buffer and spring. Do NOT use a CAR buffer/spring in A2 stocks or A2 buffer/spring in collapsible CAR stocks.
  3. Kestrel

    Kestrel Well-Known Member


    Thanks for the info! Is there any reliability compromise by switching to the fixed stock, since it uses a different buffer tube?

    Thanks again,
  4. Jack19

    Jack19 Well-Known Member

    Reliablility shouldn't change, just make sure you're using the spring and buffer for the A2 stock and don't over grease. As Syd mentioned, I think the fake retractable stock buffer and springs are the same as the A2.
  5. Kharn

    Kharn Well-Known Member

    The proper way to check buffer length is to put the buffer in the tube (no spring) and see how far back a carrier can move in the tube. The gas key on top of the carrier should stop ~1/4" from the rear of the lower when you have the right tube and buffer; if you have the short buffer in the long tube, the key will smack the lower upon firing (a very bad thing, has broken at least one rifle into in two pieces), if you have the long buffer in a short tube, the gun wont work.


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