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Posted: 3/21/2010 5:35:02 PM EDT
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Fairly new Sabre with 500 rounds through it. I only had two Pmags with me that were bought last year. Changing between mags each one failed a bolt open. Everything is stock on the rifle. Any thoughts? ETA: Seeing that the spring seemed to weak in the PMag I ordered 10% stronger springs. Installed them and now it holds the bolt back. |
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Fairly new Sabre with 500 rounds through it. I only had two Pmags with me that were bought last year. Changing between mags each one failed a bolt open. Everything is stock on the rifle. Any thoughts? not mag related....rifle related. either yer bolt catch hole on the reciever is slightly out of spec or the bolt catch itself is....I had similar issues when my rifle was new and after some rounds through it, it finally wore in and functioned properly. Maybe trying lubing it, or working it with yer fingers, check to see if it moves smoothly and freely. |
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Quoted: Quoted: Fairly new Sabre with 500 rounds through it. I only had two Pmags with me that were bought last year. Changing between mags each one failed a bolt open. Everything is stock on the rifle. Any thoughts? not mag related....rifle related. either yer bolt catch hole on the reciever is slightly out of spec or the bolt catch itself is....I had similar issues when my rifle was new and after some rounds through it, it finally wore in and functioned properly. Maybe trying lubing it, or working it with yer fingers, check to see if it moves smoothly and freely. I took the upper off and worked a USGI mag and a PMag to see what was happening. The USGI mag allowed the bolt catch to work freely where the PMag put pressure on it to keep it from pushing it all the way up. I can only guess that I could find a stronger spring for the bolt catch (if that exists?) and polish the contacts b/w the rifle and the bolt catch itself? |
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I find it interesting that the rifle is quickly suspect, not the magazine...especially in light that USGI mags are holding the bolt to the rear, while the Pmag isn't. Regards, Hotgun Agreed, most problems start with Mag and Ammo when something is going wrong. The fact that the usgi is working tells you this is probebly a mag problem. Buy a new Pmag and see what happens. |
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Quoted: Quoted: I find it interesting that the rifle is quickly suspect, not the magazine...especially in light that USGI mags are holding the bolt to the rear, while the Pmag isn't. Regards, Hotgun Agreed, most problems start with Mag and Ammo when something is going wrong. The fact that the usgi is working tells you this is probebly a mag problem. Buy a new Pmag and see what happens. I have 16 different Pmags. It appears that the USGI has a little more wiggle room to allow the catch to work w/o the upper on. I put the upper back on, closed the bolt and inserted one of each. The PMag sits very tight against the bolt but the USGI still can move a tiny bit. When fully loaded, bolt closed the Pmag must be slammed in to stay in the mag well. I think I am going to buy some USGI's and call it even. |
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I find it interesting that the rifle is quickly suspect, not the magazine...especially in light that USGI mags are holding the bolt to the rear, while the Pmag isn't. Regards, Hotgun Agreed, most problems start with Mag and Ammo when something is going wrong. The fact that the usgi is working tells you this is probebly a mag problem. Buy a new Pmag and see what happens. Well when the guy first posts that he had two mags and both did it....I say rifle. Even though the USGI's are working, the P-Mags should as well. |
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I find it interesting that the rifle is quickly suspect, not the magazine...especially in light that USGI mags are holding the bolt to the rear, while the Pmag isn't. Regards, Hotgun Agreed, most problems start with Mag and Ammo when something is going wrong. The fact that the usgi is working tells you this is probebly a mag problem. Buy a new Pmag and see what happens. Well when the guy first posts that he had two mags and both did it....I say rifle. Even though the USGI's are working, the P-Mags should as well. I understand what you are saying but we are talking about a 1000 dollar rifle or a 17 dollar mag. Two non working mags does not confirm anything other than mags are not working. I had two PMAG's 1-09 that would not drop free from mag well and were very tight. I did not think my magwell was out of spec. Turns out there was a small run of mags that would not drop free. Got new mags no problems. Now if all 16 PMAG's this guy has do not work and have different production dates, then I would think it was out of spec rifle part. Im just saying start with the small things before messing with an expensive rifle. |
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I find it interesting that the rifle is quickly suspect, not the magazine...especially in light that USGI mags are holding the bolt to the rear, while the Pmag isn't. Regards, Hotgun Agreed, most problems start with Mag and Ammo when something is going wrong. The fact that the usgi is working tells you this is probebly a mag problem. Buy a new Pmag and see what happens. Well when the guy first posts that he had two mags and both did it....I say rifle. Even though the USGI's are working, the P-Mags should as well. I understand what you are saying but we are talking about a 1000 dollar rifle or a 17 dollar mag. Two non working mags does not confirm anything other than mags are not working. I had two PMAG's 1-09 that would not drop free from mag well and were very tight. I did not think my magwell was out of spec. Turns out there was a small run of mags that would not drop free. Got new mags no problems. Now if all 16 PMAG's this guy has do not work and have different production dates, then I would think it was out of spec rifle part. Im just saying start with the small things before messing with an expensive rifle. Agreed, however it is not tough to check the BHO for proper, smooth, function. And if it does feel gritty or sticky, then you know where the problem lies. |
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Fairly new Sabre with 500 rounds through it. I only had two Pmags with me that were bought last year. Changing between mags each one failed a bolt open. Everything is stock on the rifle. Any thoughts? not mag related....rifle related. of course, couldnt be the mag... |
| You could call it tolerance stacking or whatever you want. But I would look for a solution with the rifle. I want my rifle to take any mag I put in it. I have never had a similar issue so not qualified to tell you what to do, only encourage you to pursue the rifle fix. |
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