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Posted: 4/22/2009 1:13:54 PM EDT
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I had a feeding problem with my 16" Del-Ton over Stag M4gery that I (with arfcom's help) determined to be due to a weak buffer spring. Just a mention, I have a pinned (non-telescoping to comply with NYS AWB) "M4 type" stock. Read previous thread here
So I ordered this replacement spring and it came today. It is noticably shorter by about one inch. I installed it nonetheless and although I haven't used the gun yet (going to the range tomorrow) it feels okay. I'd say it takes the same strength to charge the bolt, and the bolt seems to move forward with the proper amount of force. Is it normal to have a replacement spring of a different length that would somehow function okay? Or did I screw myself somehow. Range report coming tomorrow, but I'd like to tap Arfcom's opinion now. Thanks guys. |
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To my knowledge, the new spring should be longer. How many rounds did you have through the rifle before this problem was blamed on the spring? What kind of feeding issues are you having? Let's start there.
Edit: Just read your other thread. Got most of my answers. |
| I don't think your buffer spring would be junk after only 750 rounds and 3 years of sitting unless it was junk in the first place. Take your upper and pull the bolt carrier out of it with the bolt in it. Now, tilt the upper 90 degrees so the barrel is pointing to the floor and line up the BCG with the carry handle like you were reassembling it... drop it in. It should go most of the way in without much help. If it gets hung up, out of spec upper causing drag? I'll look into some more possibilities... |
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Before I switched springs, there was a noticable difference in the forcefulness of the bolt slamming forward under power of the spring between my 2 identical 16"ers, so I changed the spring.
But I'd still like to know the difference in spring lengths. Do different spring manufacturers make different length springs with identical strengths? |
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Hmm... WHAT THE HELL???
I have 2 Carbines (16") with non-collapsing, fixed, M4 lookalike-type buttstocks. I also have 1 20" rifle with an A2 stock. One of the Carbines has a short spring and short buffer. (this one was working fine). The other Carbine has a longer spring and longer buffer, THE SAME AS THE RIFLE WITH A2 STOCK!! Which combination belongs in the CAR with Fixed stock??? |
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Well I figured it out.
Of the 2 fixed "Carbine" stocks, one has a stopper at the back much further than the other. In other words, the tube itself that is used by the spring and buffer is about 2 inches deeper than the other. Now I have to get a "rifle length" spring for my carbine. 
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