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Posted: 4/23/2018 4:09:18 PM EDT
[#1]
Quoted:
Hi, I am new to AR-15 family, could anybody advise me? I would like to replace commercial stock tube to mil-spec. Mil-spec is shorter so which buffer spring is recommended? I tried to use original commercial buffer spring in mil-spec tube but didnt work 100%. thank you Jan Czech republic  Attached File Attached File |
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Posted: 4/23/2018 4:32:37 PM EDT
[#2]
That's what I thought but here's one example- when I shot my rifle with commercial stock tube I had no problem. When I replaced it with mil-spec the bolt carrier stayed in front position after last round instead of back position as ussual. That's why I think the problem is the buffer spring.
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Posted: 4/23/2018 5:20:23 PM EDT
[#3]
Carbine setup: both comm. and mil spec use the same spring/buffer. Should be a non issue. Pics would really help your cause.
Same spring and buffer in both? |
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Posted: 4/28/2018 2:48:10 AM EDT
[#4]
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Posted: 4/28/2018 11:06:42 AM EDT
[#5]
Quote HistoryQuoted:
That's what I thought but here's one example- when I shot my rifle with commercial stock tube I had no problem. When I replaced it with mil-spec the bolt carrier stayed in front position after last round instead of back position as ussual. That's why I think the problem is the buffer spring. |
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Posted: 4/29/2018 12:56:53 PM EDT
[#6]
Quoted:
Hi, I am new to AR-15 family, could anybody advise me? I would like to replace commercial stock tube to mil-spec. Mil-spec is shorter so which buffer spring is recommended? I tried to use original commercial buffer spring in mil-spec tube but didnt work 100%. thank you Jan Czech republic Instead of Commercial -> Mil Spec (carbine) are you sure it's not Rifle -> Mil Spec (carbine) ? That's where nothing interchanges. |
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Posted: 5/1/2018 7:55:01 AM EDT
[#7]
I would post pics but can't find out how. I konw there's icon above thi text but I'm IT looser
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Posted: 5/1/2018 11:13:52 AM EDT
[#8]
Based on the drawing above, would the thread diameter difference be an issue?
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Posted: 5/1/2018 11:23:52 AM EDT
[#9]
Quote HistoryQuoted:
Based on the drawing above, would the thread diameter difference be an issue? |
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Posted: 5/1/2018 11:45:05 AM EDT
[#10]
Quote HistoryQuoted:
That's what I thought but here's one example- when I shot my rifle with commercial stock tube I had no problem. When I replaced it with mil-spec the bolt carrier stayed in front position after last round instead of back position as ussual. That's why I think the problem is the buffer spring. |
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Posted: 5/1/2018 12:29:57 PM EDT
[#11]
Agree with the post above. If the bolt carrier group won't manually lock back measure your spring first. From AR15.com archive:
A minimum length rifle spring (30 cm) looks a lot like a maximum length carbine spring (28.5 cm) but the coils of a rifle spring will stack before the carrier can go back far enough to lock. |
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Posted: 5/1/2018 1:22:33 PM EDT
[#12]
Quote HistoryQuoted: I would post pics but can't find out how. I konw there's icon above thi text but I'm IT looser |
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