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Posted: 11/6/2008 2:52:39 PM EDT
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i recently picked up a M&P AR15 and it has the collapsible stock. I wish to take this stock off and put it on my colt HBAR 11, and then put the a2 stock back on the smith.
Will the buffer tube from th colt fit the smith and vise versa.Do you see any problems switching out between the two. I have never changed a stock out so any advice would be welcomed.Also what replacement screw is needed for the a2 stock. The book says if you remove the stock a new screw would be required, looked on the web not sure what i will need. Once again thanks Aussie M1a |
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You will keep the same buffer and recoil spring with the same butt stock system, not mater what lower they are on. The buffer and spring (lengths) go hand in hand with the depth of the receiver extension tube void, and not the actual rifle type system.
On the S&W, you pull down on the lever (not just levered to one side) to pull the butt stock off the back of the tube. Using heat and a castle nut wrench, you will spin the castle nut counter clockwise. As the receiver plate comes back off the receiver as you loosen the castle nut, you will retain the rear take down spring and detent. As you spin the tube off the receiver (again heat if needed) you will retain the buffer retainer and spring (end of the tube retains them in the receiver). ON the Colt, use a huge flat head screw driver to loosen the top butt plate screw. Since the A-2 stock does not have a receiver plate, and the front of the stock retains these parts, retain the rear take down pin spring and detent. Again with the heat, and using the rear flats on the A-2 tube with the wrench, start spinning the tube off the receive while retaining the buffer retainer and spring. The butt stock screw will be used on the reinstall, but remember to put the A-2 tube spacer back on the tube before installing the stock back on the tube. When putting the carbine tube on the new lower, remember that the end of the tube has to be screwed into the receiver far enough during index to retain the buffer retaining pin. http://www.ar15.com/content/index.html#guides 
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