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Posted: 9/13/2012 1:37:03 PM EDT
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I picked up a GP75 (WASR) for cheap knowing it had issues. ($250) The gas piston was not properly pinned so I corrected that and they were using shitty TAPCO polymer mags, so I used some euro surplus mags.
When trying to chamber a round from the mag the bolt does not close completely, appears to be about 1" from the carrier being completely forward. I must "mortar" the charging handle to get the round to eject. See attached pictures. 
Above is fired case (from different rifle) 
live round Thoughts? I'm thinking out of spec chamber or the headspace is all jacked up? |
| Id clean it well first then check it with a headspace guage then if not you might just buy a chamber reamer and ream it.... But for you have invested your not at a bad start....I saw somewhere in the web where you could rent these tools..... You probally never again use a reamer.....But for shits and giggles strip your bolt and check it with a go gauge and take and post a picture...Mabey its my eyes but dosent your feed ramp look alittle beat up..... |
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Quoted:
I picked up a GP75 (WASR) for cheap knowing it had issues. ($250) The gas piston was not properly pinned so I corrected that and they were using shitty TAPCO polymer mags, so I used some euro surplus mags. When trying to chamber a round from the mag the bolt does not close completely, appears to be about 1" from the carrier being completely forward. I must "mortar" the charging handle to get the round to eject. See attached pictures. http://i1092.photobucket.com/albums/i406/PracticalMultiGun/photo-3.jpg http://i1092.photobucket.com/albums/i406/PracticalMultiGun/photo-2-1.jpg http://i1092.photobucket.com/albums/i406/PracticalMultiGun/photo-4.jpg Above is fired case (from different rifle) http://i1092.photobucket.com/albums/i406/PracticalMultiGun/photo-1-2.jpg live round Thoughts? I'm thinking out of spec chamber or the headspace is all jacked up? The issue is that Century had barrels made by Green Mountain that had incorrectly placed gas ports and handguard retainer cuts in them and ever so slightly deeper chamber. They were placed too far forward, so Century had to push the barrels in a few thousands of an inch more than normal. They did this so that there would be less play between the gas tube and lower handguard. Since they did this, the bolt would not headspace to the barrel. Century's solution?.....file down the back of the bolt lugs. Without a round, you will notice that the bolt fits very loosely...with a round, it is difficult to chamber. If you look at your photos, you will notice that there is some gouging on the breech from the front of the lugs due to Century's infamous gunsmithing techniques. The only way to correct this is to lube it good on the front of the lugs, manually cycle some rounds with the firing pin removed until it mates in with the breech. Do NOT file any more material from the lugs. |
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