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Old May 15, 2013, 11:47 AM   #1
mapsjanhere
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300 AAC AR-15 spring/buffer

I had a stripped lower lying around and run across an actual in stock 300 AAC complete upper. The one thing I'm unsure about with this build is the spring/buffer combination. I don't see a specific 300 AAC set offered, so am I fine with a regular 223 spring (I have a Wolf Xtra strong spring that I was thinking of using, plus a heavier buffer)?
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Old May 15, 2013, 02:12 PM   #2
Palmetto-Pride
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I used the stock spring and buffer that came with my 5.56 and I haven't had a problem.
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Old May 16, 2013, 03:18 PM   #3
Mobuck
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I saw one on Brownells that was supposed to help with "undergassed" 300 AAC carbines. It used a softer spring. Mine works fine with a standard carbine spring and buffer.
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Old May 16, 2013, 08:22 PM   #4
Justice06RR
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You should be fine with a standard carbine spring and buffer. You can upgrade to a Heavy buffer if you prefer.
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Old May 16, 2013, 08:41 PM   #5
TMD
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If its a 16" upper with a carbine length gas tube then a standard carbine buffer and spring will work just fine.
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