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Posted: 6/10/2007 7:12:19 AM EDT
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Anyone have ejection problems with their M169? On a good day, the one I have gets through a couple of mags then starts to not want to eject casings. When the failure occurs the next round is being fed so the bolt seems to be traveling far enough back to eject the casing. Configuration is: RRA stripped lower, with m16 trigger, standard buffer. Hahn bottom loaded mag block Bolt is lee’s ramped bolt Colt 32rd mags(for hold open capabilities) Ammo – 9mm ball m882 nato stamp Any guidance would be appreciated. If yours is running great I'd love to hear about it and how yours is configured. JJ |
Well there you go. If he uses a RRA bolt, then extractor is held in place by a rolled piece of steel. RRA considers this as good as a roll pin. Take your bolt to Home Depot and get a REAL roll pin. It solved my problems with extraction. Never had a problem since and I have about 2k rounds F/A through mine. |
They are spiral pins that RRA uses and i cant beleive that they still use them with all the problems they have. 1/8" Roll Pin is what you need.Mike |
I got my magblock from ADCO its a RRA and im using colt mags 20 round and 32 round. Mike |
| Mine came complete with a Hahn bottom loader mag block and AAC 9mm buffer. I am also using Colt 32 rd mags. I tried Pro Mags but they never worked from day 1. I did not replace my roll pin. I pulled the pin out cleaned the area, and replaced the same pin. It has run fine since. |
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I think you hit the nail on the head SBR(finger on casing in this case). While monkeying around I found that if I worked the action while applying a little outward pressure on the finger, the finger would miss the case or barely make contact. Any suggestions on how to get the ejector finger solid to the block? many thanks, and my appoligies for my slow brain not picking up on your post sooner. regards, jj |
Get a new magblock it should be covered.Mike |
Quick repair be to pack the void with JB Weld, or Acra-Glas, or take a center punch and poke material over to tighen the fit. I have heard of somebody taking a piece of shim (taken from a feeler gauge set) and using the needed thickness to take up the slop. I suppose you can send the block back and ask for a replacement that the eject finger is held in a "fixed" position (my block is solid - Hy-Tech). After you get the eject finger solid, of course you will want to verify correct positioning of the finger in relation to the bolt face and adjust accordingly to get max contact with the case face to tap it out the port opening. |
You don't even have one of these adapters and you are giving hearsay advise on how to fix it??? ALL of the Hahn adapters have a 'floating' ejector that alleviates any friction in the bolt. The instant that the case is hit by the tip of the ejector it is fully contained in the slot of the bolt. If the slot on the bolt is too wide, shallow, or cut poorly you can have friction or alignment problems. Weak ejection is a symptom of an extractor problem not holding the case firmly against the bolt face. The extractor hook may be bad, the tension may be weak, or your roll pin may be loose. The 9mm AR is more like a 1911 and like a 1911 your extractor can be a pain to 'tune' if you are having problems, a gunsmith familiar with the 1911 can help you out. |
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