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The Range
Rifle & Shotgun Discussion
***Fixed!***What AR-10 Buffer/Spring are you running with the Magpul UBR?
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<blockquote data-quote="rockchalk06" data-source="post: 3918653" data-attributes="member: 40794"><p>Still have some cycling issues with my M5 build and I'm stumped.</p><p></p><p>I'm running the KM .308 Buffer. 2.75" Long @3.6oz and a .308 Carbine Spring. The UBR Gen 2 has its own tube which is a tad longer. They provide you with the spacer for this. </p><p></p><p>With and without the spacer, no go. Will not lock back on an empty mag. 6 different mags and ammo running 2400 FPS up to 2750 FPS, no go. Will only pick up the next round maybe 10% of the time. </p><p></p><p>Can pull the charging handle back and lock it on all mags no issues. </p><p></p><p>Gas block is all the way open too. I've ran it all the way closed to open (16 clicks). No carbon showing anywhere around the gas block </p><p></p><p>This what has me think buffer and spring?</p><p></p><p>Any help would be appreciated</p><p>Thanks OSA</p></blockquote><p></p>
[QUOTE="rockchalk06, post: 3918653, member: 40794"] Still have some cycling issues with my M5 build and I'm stumped. I'm running the KM .308 Buffer. 2.75" Long @3.6oz and a .308 Carbine Spring. The UBR Gen 2 has its own tube which is a tad longer. They provide you with the spacer for this. With and without the spacer, no go. Will not lock back on an empty mag. 6 different mags and ammo running 2400 FPS up to 2750 FPS, no go. Will only pick up the next round maybe 10% of the time. Can pull the charging handle back and lock it on all mags no issues. Gas block is all the way open too. I've ran it all the way closed to open (16 clicks). No carbon showing anywhere around the gas block This what has me think buffer and spring? Any help would be appreciated Thanks OSA [/QUOTE]
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The Range
Rifle & Shotgun Discussion
***Fixed!***What AR-10 Buffer/Spring are you running with the Magpul UBR?
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