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Posted: 11/24/2020 10:17:44 AM EDT
I’m trying to decide which rail I want to put on my primary rifle, for those that have experience with both, what are your thoughts?
Cost and bendiness aren’t factors in my decision. 
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Posted: 11/24/2020 10:26:50 AM EDT
[#1]
Quoted: I’m trying to decide which rail I want to put on my primary rifle, for those that have experience with both, what are your thoughts? Cost and bendiness aren’t factors in my decision. If you don’t care about price or quality, then what are the factors in your decision? Strictly aesthetics? |
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Posted: 11/24/2020 10:31:32 AM EDT
[#2]
I had this same question 3 weeks ago. I got both. The MK16 is in my closet because it is heavy. The MCMR in on my rifle. If you can not find a MK16, the LAT from Larue is a great alternative.
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Posted: 11/24/2020 10:32:14 AM EDT
[#3]
I have MCMRs on my most of my rifles. The agency I work for is getting all new BCM uppers with the MCMRs as well, no complaints from the field that I've heard. They do the job well enough.
 
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Posted: 11/24/2020 10:59:13 AM EDT
[#4]
Quote HistoryQuoted: If you don’t care about price or quality, then what are the factors in your decision? Strictly aesthetics? Quote HistoryQuoted: Quoted: I’m trying to decide which rail I want to put on my primary rifle, for those that have experience with both, what are your thoughts? Cost and bendiness aren’t factors in my decision. If you don’t care about price or quality, then what are the factors in your decision? Strictly aesthetics? I do care about quality, I just know that MK16 discussions invariably turn to “bendy boi” comments, and I’m not concerned with that aspect. Other factors that are a consideration are ergonomics, and heat dissipation. I’m also looking for any general complaints that people may have. |
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Posted: 11/24/2020 11:03:15 AM EDT
[#5]
Quote HistoryQuoted: I had this same question 3 weeks ago. I got both. The MK16 is in my closet because it is heavy. The MCMR in on my rifle. If you can not find a MK16, the LAT from Larue is a great alternative. Weight is my biggest concern with the MK16, if it was a bit lighter I would just get one of those for sure. |
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Posted: 11/24/2020 11:13:19 AM EDT
[#6]
Quote HistoryQuoted: Weight is my biggest concern with the MK16, if it was a bit lighter I would just get one of those for sure. Be careful with the MK16. I can not let it go. I’m honestly planning an entire build around that handguard instead of selling it. Also, I cerakoted the BCM logo on the MCMR. No star logos for me. Cost me 65 extra $ to spay and install MCMR. |
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Posted: 11/24/2020 1:11:58 PM EDT
[#7]
The MK16 is easier to install but is blocky and crude. Looks like a dipshit designed the barrel nut interface.
The MCMR is a little more difficult to install, but the way it clamps to the barrel nut is a lot more refined. |
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Posted: 11/24/2020 1:12:39 PM EDT
[#8]
Quote HistoryQuoted: Be careful with the MK16. I can not let it go. I’m honestly planning an entire build around that handguard instead of selling it. Also, I cerakoted the BCM logo on the MCMR. No star logos for me. Cost me 65 extra $ to spay and install MCMR. What about it do you like so much? |
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Posted: 11/24/2020 11:02:43 PM EDT
[#9]
MCMR
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Posted: 11/26/2020 6:01:24 PM EDT
[#10]
MK16. They are not bending down range.
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Posted: 11/27/2020 3:44:09 PM EDT
[#11]
I would say the biggest difference is weight and lengths that they are available in other than cost and bendiness.
15.0" MK16 15.8oz 13.5" MK16 14.8oz 10.5" MK16 12.5oz 9.3" MK16 11.8oz 15.0" MCMR 11.5oz 13.4" MCMR 10.5oz 10.5" MCMR 8.9oz 8.1" MCMR 7.6oz 7.4" MCMR 7.1oz |
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Posted: 1/17/2021 12:54:53 AM EDT
[#12]
Quote HistoryQuoted: I would say the biggest difference is weight and lengths that they are available in other than cost and bendiness. 15.0" MK16 unknown (was only available in black on Duty URGs) 13.5" MK16 14.8oz 10.5" MK16 12.5oz 9.3" MK16 11.8oz 15.0" MCMR 11.5oz 13.4" MCMR 10.5oz 10.5" MCMR 8.9oz 8.1" MCMR 7.6oz 7.4" MCMR 7.1oz Thanks for the comparison @pezboytate! I have 1@ 13 inch. The MK16 is so much better, cause.....well USASOC issued it. Function? The MCMR is sleek, minimalist and functional. I like them both, then again I like my UTG PRO SS so much I have one 13 and one 10.5. Buy both! |
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Posted: 1/17/2021 11:37:04 AM EDT
[#13]
BCM
I dont like to over pay for something straight forward like a rail. Its light, sturdy and has a good attachment system at a fair price. Nothing wrong with a G rail, but I dont need the weight and the price is too much for me and what I want/need. |
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Posted: 1/17/2021 11:57:38 PM EDT
[#14]
I prefer the Geissele for it's barrel nut and barrel nut wrench design, which makes it easier to tighten/loosen the barrel nut without marring it making it a lot less likely to have to hammer the rail on/off the barrel nut.https://www.ar15.com/forums/AR-15/BCM-KMR-Barrel-Nut-Installation-Questions/4-760369/ I know it's not much but I also like that the Geissele's anti-rotation screws provide a more positive lock up than the BCM's anti-rotation insert.
That said the BCM is lighter and has a smoother transition from the rail to the lower receiver. The Geissele MK14's are a little bit lighter than the MK16's (and cheaper) if weight is more important than having M-Lok slots on 7 sides but they're still not as light as the BCM's. 15.0" MK14 13oz 13.5" MK14 11.5oz 9.5" MK14 9.6oz Quoted: I would say the biggest difference is weight and lengths that they are available in other than cost and bendiness. 15.0" MK16 15.8oz 13.5" MK16 14.8oz 10.5" MK16 12.5oz 9.3" MK16 11.8oz 15.0" MCMR 11.5oz 13.4" MCMR 10.5oz 10.5" MCMR 8.9oz 8.1" MCMR 7.6oz 7.4" MCMR 7.1oz |
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