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+--- Thread: Grendel LMG (/showthread.php?tid=978)
Grendel LMG - stanc - 02-26-2014
http://www.xcrforum.com/forum/7-general-discussion/16594-mk46-caliber-conversion.html#post200462
http://www.xcrforum.com/forum/7-general-discussion/16594-mk46-caliber-conversion-2.html#post200562
Grendel LMG - LRRPF52 - 02-26-2014
Quote:6.5 Grendel on an RPD belt....like they were meant to go together.....
![[Image: 6423d1378913210t-mk46-caliber-conversion-imag0421.jpg]](http://www.xcrforum.com/forum/attachments/6423d1378913210t-mk46-caliber-conversion-imag0421.jpg)
![[Image: 6424d1378913221t-mk46-caliber-conversion-imag0422.jpg]](http://www.xcrforum.com/forum/attachments/6424d1378913221t-mk46-caliber-conversion-imag0422.jpg)
Grendel LMG - stanc - 02-26-2014
LRRPF52 Wrote:6.5 Grendel on an RPD belt....like they were meant to go together.....Yes indeed. But, we already knew that from the terrific work done in late 2011 by RangerRick, and his posts on pages 6-7 of this thread.
While it would be great to see a Grendel LMG even if it feeds from RPD belts, to have the slightest chance of being adopted by the US military will require disintegrating links.
Grendel LMG - Variable - 02-27-2014
stanc Wrote:http://www.xcrforum.com/forum/7-general-discussion/16594-mk46-caliber-conversion.html#post200462Wow! I haven't been paying enough attention to who is making what. I didn't even know they were making those. I started to get excited------ until I saw their prices. Uggh.
http://www.xcrforum.com/forum/7-general-discussion/16594-mk46-caliber-conversion-2.html#post200562
Grendel LMG - stanc - 05-08-2014
Sharky47 reports that he now has "a 6.5 Grendel barrel made and waiting on my personal semi auto [Mk46] to be made/delivered."
http://68forums.com/forums/showthread.php?48589-M249-MK46-in-6-8-SPC-II-done&p=549302&viewfull=1#post549302
Grendel LMG - stanc - 06-09-2014
http://www.dtic.mil/ndia/2014armaments/Wed16533_Shipley.pdf
Page 12
7.62mm CT MMG weight 18.0 lbs
600 rds CT ammo weight 23.1 lbs
An FN MK46 in 6.5 Grendel would be about 2 lbs lighter. Ammo weight would be roughly the same if brass cases are used, or significantly less if polymer cases prove feasible.
Grendel LMG - LRRPF52 - 06-09-2014
They need a 6.5mm CT system if the MTBF is as good or better than the PKM. There is no longer a need to have any kind of shackles or compatibility with legacy barrels, chambers, or links, and they are almost at parity for weight with a 7.62 CT system compared to an existing SAW chambered in 5.56 NATO, both with 600rds of ammo.
That means you could have more ammo for 6.5mm than the current 5.56 SAW, with less weight, and more effective range than the 7.62 NATO or PKM, with less volume/bulk than the SAW. With no brass, which is the most expensive component in ammunition, this could really be something if the reliability is there.
Also, the 7.62 SP1D CT case would provide more propellant room, with less OAL than a 5.56 NATO cartridge, so if they optimized a slow-burning propellant and gas system length, we could have a crazy long green projectile with lower chamber pressure, and more mv than anything limited by an AR15 magazine well.
This would be a significant overmatch against existing small arms. Next step is the 21st Century MMG with a .338 or .375 projectile to replace .50 BMG, using a constant recoil operating system.
With the carbine/LMG, it looks like you could issue it to Assaulters/Riflemen, and overmatch combat endurance of legacy enemy systems by over 300%. Logistically, the implications for tactics and doctrine are huge.
Grendel LMG - stanc - 06-15-2014
It's been a full decade since introduction of 6.5 Grendel. Never mind a belt-fed machine gun, but I thought by now that somebody would've at least built a Grendel automatic rifle. :confused:
![[Image: LSW3.jpg]](http://home.comcast.net/~sfischer397/m16a2oblmg/m16a2oblmgpics/LSW3.jpg)
[video=youtube;tLX2zauiI38]http://www.youtube.com/watch?v=tLX2zauiI38[/video]
http://www.youtube.com/watch?v=tLX2zauiI38
Grendel LMG - stanc - 06-15-2014
Note comment @ 2:10
[video=youtube;LxRMD1FQjAc]http://www.youtube.com/watch?v=LxRMD1FQjAc[/video]
http://www.youtube.com/watch?v=LxRMD1FQjAc
Grendel LMG - Variable - 06-19-2014
stanc Wrote:It's been a full decade since introduction of 6.5 Grendel. Never mind a belt-fed machine gun, but I thought by now that somebody would've at least built a Grendel automatic rifle. :confused:
[video=youtube;tLX2zauiI38]http://www.youtube.com/watch?v=tLX2zauiI38[/video]
http://www.youtube.com/watch?v=tLX2zauiI38
I've got a 5.56 upper but no one will make me a proper 6.5 one.
Well, you and I brought it up multiple times, but I couldn't get an answer from AA. When we posted about it on the old board enough, I finally got the equivalent of a polite "pound sound", but never anything more. After Sabre went tits up I gave up all together.
The Lothar Walther crew emailed back then (when the fur was flying) wanting to make me a barrel, but they obviously weren't making what I needed. They didn't grasp the fact that I needed a heavy chromed bore, and not a "match stainless" tube.
After that, I had hoped that maybe PSA might get FN to make some Grendel tubes with heavy chrome, buuuuuutttt..... Pttthhh! Nope.
The demonstrated lack of any serious attention to the Grendel for military type stuff is why I don't come here much any more. I have three Grendels, a registered auto sear, and suppressors, but this cartridge peaked for me many years ago. I've seen nothing in the way of real advancement, so why bother. I can't take this round very seriously if none of the manufacturers will.
Grendel LMG - stanc - 06-19-2014
Variable Wrote:The demonstrated lack of any serious attention to the Grendel for military type stuff is why I don't come here much any more. I have three Grendels, a registered auto sear, and suppressors, but this cartridge peaked for me many years ago. I've seen nothing in the way of real advancement, so why bother. I can't take this round very seriously if none of the manufacturers will.Chris, I feel the same way.
Grendel LMG - Variable - 06-20-2014
Maybe if the steel case ammo starts coming in in sizable quantities, it'll help out. It couldn't hurt at least.
Grendel LMG - stanc - 10-08-2014
[video=youtube;z2Pq4_XdA-k]https://www.youtube.com/watch?v=z2Pq4_XdA-k[/video]
https://www.youtube.com/watch?v=z2Pq4_XdA-k
http://www.tactical-life.com/firearms/us-machine-gun-armorys-m249-saw-6-8-spc/
Grendel LMG - SHORT-N-SASSY - 10-08-2014
[SIZE="3"]In view of the high Ballistic Coefficient of the projectiles used in the 6.5mm Grendel vs the 6.8mm SPC http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P54.jpg?sequence-54 (Click-on the 6.8x43mm SPC - 6.5mm Grendel cartridge cutaways *) and the resultant superior downrange performance of the Grendel, what's it going to take to change this http://www.xcrforum.com/forum/attachments/6424d1378913221-mk46-caliber-conversion-image0422.jpg to effect a M249 SAW in 6.5mm Grendel?
* ETA: Shooting Times, February, 2005, Cooking Up Loads For The 6.5mm Grendel, By David Fortier (5 Pages):
http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P52.jpg?sequence=52
http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P53.jpg?sequence=53
http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P54.jpg?sequence=54
http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P55.jpg?sequence=55
http://mobile.outdoorhistory.com/xmlui/bitstream/handle/123456789/20102/Large/BFW0020801P56.jpg?sequence=56
[/SIZE]
Grendel LMG - stanc - 10-08-2014
FYI:
sharky47 Wrote:Update on Grendel......I hope that sharky47 will post future updates here in this forum.
Just waiting on my personal title1 SAW to be delivered. I already made a bolt, extractor, and barrel...
http://68forums.com/forums/showthread.php?48589-M249-MK46-in-6-8-SPC-II-done&p=593495&viewfull=1#post593495
Grendel LMG - LRRPF52 - 10-08-2014
That concrete erasure was awesome. Get a 130gr 6.5mm trucking out of an LMG and we're in business.
I need to get a hold of these guys, as they are in my backyard practically.
Grendel LMG - stanc - 10-10-2014
SHORT-N-SASSY Wrote:In view of the high Ballistic Coefficient of the projectiles used in the 6.5mm Grendel...and the resultant superior downrange performance of the Grendel, what's it going to take to change this http://www.xcrforum.com/forum/attachments/6424d1378913221-mk46-caliber-conversion-image0422.jpg to effect a M249 SAW in 6.5mm Grendel?Not much, I would think. From the MGA site:
[COLOR="blue"]====================
In Seattle during the 2012 NDIA Live Firing Demonstration, the US Machine Gun Armory re-defined the Light Machine Gun category but demonstrating M249 SAW caliber conversion kits for 7.62x51mm and 7.62x39mm calibers.
http://www.machinegunarmory.com/news.html
====================
By just swapping out existing top-covers and a couple of other parts and replacing them with our custom built, patent-pending parts, you can transform your SAW into other 7.62mm calibers.
http://www.machinegunarmory.com/m249modernization.html
====================
The following caliber conversion kits allow ALL types of M249 SAWs worldwide to support the following calibers
7.62x39mm - using RPD cans
http://www.machinegunarmory.com/multicaliber.html
====================[/COLOR]
If they can do 7.62x39 conversions that use RPD belts, it doesn't seem like there should be any technical reason to prevent a 6.5 Grendel conversion using RPD belts.
All it should require is enough $$$$$ and determination.
Grendel LMG - BluntForceTrauma - 10-11-2014
Companies selling machine guns. . . . God bless America!
Grendel LMG - stanc - 12-10-2015
Quote:Machine Gun Armory has developed a new disintegrating link specifically for the 6.8 SPC round, to allow its use in belt-fed light machine guns... These links, called M68, are made to the same exacting tolerances as M13 & M27 links, but sized for 6.8 SPC ammunition. M68 links also work for 7.62x39 ammunition...I wonder if the M68 links would be usable with 6.5 Grendel?
https://mga1-3.myshopify.com/pages/caliber-6-8-spc
![[Image: 6.8mm_SPC_250_large.jpg?2467293996503807719]](https://cdn.shopify.com/s/files/1/1060/7254/files/6.8mm_SPC_250_large.jpg?2467293996503807719)
Grendel LMG - BluntForceTrauma - 12-10-2015
Not technically feasible.