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Posted: 2/12/2021 3:01:17 PM EDT
[#1]
I can't answer your question, but be aware that Geissele rails are now 13.5", they used to be 13"
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Posted: 2/12/2021 3:39:24 PM EDT
[#2]
Quote HistoryQuoted: I can't answer your question, but be aware that Geissele rails are now 13.5", they used to be 13" The mk13/14 and mk4/8 are now 13”? |
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Posted: 2/13/2021 11:32:44 PM EDT
[#3]
Quote HistoryQuoted: The mk13/14 and mk4/8 are now 13”? Quote HistoryQuoted: Quoted: I can't answer your question, but be aware that Geissele rails are now 13.5", they used to be 13" The mk13/14 and mk4/8 are now 13”? All new ones will be 13.5". Old stock are 13". |
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Posted: 2/13/2021 11:32:57 PM EDT
[#4]
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Posted: 3/8/2021 4:33:35 AM EDT
[#5]
I don't think it would work.
Below is a photo of my 13.7" Noveske SBR with a Geissele Mk7 rail. The rail is 12.5" inches, and exposes about 0.4" of barrel to where the muzzle device "begins." 
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Posted: 3/9/2021 2:31:32 PM EDT
[#6]
Double....triple check the exact actual length of what ever rail you choose. They are all over the place from the advertised length and they seem to change them every other year just to piss every one off. Not sure what the fuck ever happened to calling a 12.5” rail a 12.5” rail?
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Posted: 3/10/2021 4:18:35 PM EDT
[#7]
Noveske 13.7 bbl works fine on a true 13.0" rail, with just a tiny bit of clearance behind the shoulder. The LaRue UU2.0 upper 13 rail is pretty close to exactly 13.0" and is a very good, precise, fit with the 13.7 bbls.
I keep my eyes open for an older Geissele MK16 13.0, but the new ones are 13.5. Sad. 13.5 makes little sense IMO because it's "perfect" for about 14.2" barrels, and a little short, but obviously workable for 14.5's with a little more clearance than required. |
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Posted: 3/10/2021 4:52:39 PM EDT
[#8]
Quote HistoryQuoted: Noveske 13.7 bbl works fine on a true 13.0" rail, with just a tiny bit of clearance behind the shoulder. The LaRue UU2.0 upper 13 rail is pretty close to exactly 13.0" and is a very good, precise, fit with the 13.7 bbls. I keep my eyes open for an older Geissele MK16 13.0, but the new ones are 13.5. Sad. 13.5 makes little sense IMO because it's "perfect" for about 14.2" barrels, and a little short, but obviously workable for 14.5's with a little more clearance than required. The MK16 was never available in 13.0". Their other popular rails were however. I prefer a Mk18 RIS II/10.3" look but I understand that some muzzle devices may need the additional clearance. |
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Posted: 3/10/2021 4:56:42 PM EDT
[#9]
I didn't know that; I was sure I saw it listed somewhere at some point.
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Posted: 3/10/2021 5:15:26 PM EDT
[#10]
Yeah, it was probably requested by the original purchaser. All of the MK16 lengths are .2" shorter than they could be for their respective barrel lengths.
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