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Posted: 7/17/2008 6:04:51 PM EDT
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I have 2 m16a4 clones and a m16a2 clone, both are great except the a2 version, it has a very loud SPROING!! every time its fired. My other ar's dont make this noise at all, i've pulled the spring out and it appears fine, it even measures within specs, the one thing that is odd is that when i field strip it the buffer always comes not attached to the spring, i have to stick my fingure down into the stock to pull it out. Any ideas?Has anyone ever had this happen to them or heard of it happening? Should i just buy another spring assy.? This was bought used at a gun show as a stock kit...maybe thats my problem? James |
| Could be a cheapy stock. Open the trap door and see if it's got that high density yellow filler. There are some stocks that don't and are just hollow plastic. SPROING! SPROING! SPROING! - like an echo chamber. You could take the butt plate off and take some expanding spray foam to fill it (but not the wedge area for the cleaning kit). Also, you can go to ACE and get some SuperLube synthetic grease and lube that spring up good. I really goo it on - good stuff, no smell. That'll deaden much of that noise. SuperLube is great for that purpose. The purists don't think you should grease the spring but I do all mine. I don't like the sproing either. |
| Switch springs from one gun to the other and then you'll know if it's the spring construction. If it's not the spring, then switch entire assemblies. Having two guns should give you a chance to ascertain the variable that's causing the problem. Or just grease the spring and not worry about it. |
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Take a file to the end of spring coils to remove any edge burs that may be scrapping down the inside of the tube. Take a file to the buffer bumper roll pin to flush it out with the sides of the buffer so the roll pin down not catch on the coils of the spring and cause more than normal noise. Lightly lube the spring, buffer, and inside of the receiver extension with CLP. After than, you will be at the normal Spring noise/sprong level once the inside of the tube and face of the buffer, and spring itself have polished through live fire (think of it as part of the break in process). |
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Grease is a pretty nasty band aid. Every time your bolt carrier group cycles and enters the receiver extension, it is going to pick up this grease and transfer it into the upper receiver. It WILL make its way into the Lower Receiver also. Most of it will then end up in your trigger group. This wouldn't be horrible aside from the mess, but when you add fowling from firing, it is unacceptable in my opinion. If you absolutely must use some grease. Make sure it is a very light coating. Less is more. Run the weapon wet with oil or deliberately applied grease in key areas. |
Have you checked the od of the buffer where the spring end sits and compare it to your others? How about the id of the spring? |
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