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MP5 Feed issue, help!?

1035 Views 5 Replies 5 Participants Last post by  saki302, 
J
Hello, i have a special weapons SW5A in 9mm that will not feed when i slap the charging handle because the bolt does not travel far enpugh back to pick up a round. If i manually pull the charging handle to its rear most position i can then get it to feed correctly, and it fires semi-auto just fine thereafter. What is going on here? Im using an '84 HK mag, fyi. Thanks!
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retrodog
AviatorDave said:
Does the cocking tube slide with no resistance when the carrier is removed? And... does the bolt and carrier slide through the receiver with no resistance? If yes to either one of those, fix that first. Then check the recoil spring. One other possibility is that the hold-open notch is too far forward, either from wear, or from a cocking tube that wasn't quite snugged up to the receiver when it was welded.
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It sounds like your problem is more related to Dave's second point here. If the notch isn't holding the bolt back far enough to pick up a round from the mag, that's your issue. Rather hard to believe though as it would have to be a HUGE fkup, since the edge of the bolt head sits just over .5" behind the rear of the round when in the locked back position. You can inspect it by looking through the ejection port wit a loaded mag inserted.

I think you've got another problem, or your gun very poorly built.
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