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Posted: 4/6/2022 12:12:26 PM EDT
This is my first 9mm AR and I was wondering if I would benefit from a spacer or a longer buffer? The carrier seems to go much further back than it needs to.
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Posted: 4/6/2022 12:17:53 PM EDT
[#1]
Quoted: This is my first 9mm AR and I was wondering if I would benefit from a spacer or a longer buffer? The carrier seems to go much further back than it needs to. https://www.ar15.com/media/mediaFiles/54239/231EA9E8-6B6E-4C8B-9228-95E07D24157C_jpe-2339732.JPG How far back does it go? Have you measured the buffer that is in the gun? |
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Posted: 4/7/2022 10:55:19 PM EDT
[#2]
It goes back as far as it would on a 556 rifle since the buffer is the same length. The buffer is heavy but not any longer.
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Posted: 4/7/2022 11:06:13 PM EDT
[#3]
Quote HistoryQuoted: It goes back as far as it would on a 556 rifle since the buffer is the same length. The buffer is heavy but not any longer. https://www.ar15.com/media/mediaFiles/54239/228E2AC7-9ABC-4535-AB81-BFB8CE4871CD_jpe-2341619.JPG Do you have a picture of the bolt in the gun and how far it is behind the bolt stop? A picture of the buffer doesn't tell us anything. You typically want a 9mm buffer to be about 3/4" longer than a standard buffer because the bolt is shorter than a centerfire or RDB bolt. |
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Posted: 4/8/2022 12:22:17 PM EDT
[#4]
Quote HistoryQuoted: Do you have a picture of the bolt in the gun and how far it is behind the bolt stop? A picture of the buffer doesn't tell us anything. You typically want a 9mm buffer to be about 3/4" longer than a standard buffer because the bolt is shorter than a centerfire or RDB bolt. I’ll get one. It goes back a pretty decent amount past the bolt stop. |
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Posted: 4/8/2022 12:40:50 PM EDT
[#5]
Quote HistoryQuoted: I’ll get one. It goes back a pretty decent amount past the bolt stop. You might even need to shim behind the 4" buffer to get it where you want it. I had to add 1/4" behind the buffer spring, even with the longer buffer. What does the bolt and buffer weigh, together? |
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Posted: 4/8/2022 10:04:32 PM EDT
[#6]
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Posted: 4/8/2022 10:08:12 PM EDT
[#7]
BCG is 13.5oz and the buffer is 5.5oz. It appears a lot of people recommend 21-23oz so it may be a little light. I’m going to try it as is and see how it feels. I went ahead and ordered a cheap plastic spacer to see if that affects reliability before I get a different buffer.
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Posted: 4/27/2022 5:48:07 PM EDT
[#8]
Quote HistoryQuoted: BCG is 13.5oz and the buffer is 5.5oz. It appears a lot of people recommend 21-23oz so it may be a little light. I’m going to try it as is and see how it feels. I went ahead and ordered a cheap plastic spacer to see if that affects reliability before I get a different buffer. I ended up getting an extended 8oz buffer and used a spacer and what a difference it made. |
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