GEISSELE MRGG 6.5 CREED WRITE UP AND REVIEW

[rpoL98]

One thing I’m not sure I saw covered, but noticed in disassembly is the receiver extension is 1/2” longer than KAC or LMT. The longer stroke probably contributes to the softer recoil impulse.

longer buffer tube is necessary due to MRGG using the AR-15-length H2 buffer (3.25"), instead of the shorty AR-308 buffer (2.5"). if so, stroke length is the same.

my guess.

it's interesting that instead of going with the H3 5.5oz buffer, G put the weight into the tail end of the bolt carrier. I wonder how much weight, how much heavier is the MRGG bolt carrier in comparison to a run-of-the-mill AR-308 bolt carrier. I'm guessing it's more than a couple of ounces. That probably has more effect on the felt recoil, that, and the proper gas tuning, looks like a short dwell time, gas-port to muzzle, also.

I guess with that weight in the carrier, you can't just drop the firing pin down the tube any more when reassembling your BCG, it goes in via the hammer opening. no biggie.

 

[TheOE800]

longer buffer tube is necessary due to MRGG using the AR-15-length H2 buffer (3.25"), instead of the shorty AR-308 buffer (2.5"). if so, stroke length is the same.

my guess.

it's interesting that instead of going with the H3 5.5oz buffer, G put the weight into the tail end of the bolt carrier. I wonder how much weight, how much heavier is the MRGG bolt carrier in comparison to a run-of-the-mill AR-308 bolt carrier. I'm guessing it's more than a couple of ounces. That probably has more effect on the felt recoil, that, and the proper gas tuning, looks like a short dwell time, gas-port to muzzle, also.

I guess with that weight in the carrier, you can't just drop the firing pin down the tube any more when reassembling your BCG, it goes in via the hammer opening. no biggie.

The buffer is AR-15 size like KAC and LMT, and the BCG matches OAL dimension with them. FWIW KAC also uses H2 buffer on their SR25 rifles. I really do think the stroke is longer unless there’s a weight in the receiver extension.

The carrier weighs 22.1oz vs 18.9 for KAC 6.5CM BCG. The firing pin does insert via the hammer opening, the manual covers it. There is no firing pin spring unlike KAC and LMT. Not fond of those couple things with the BCG nor the ejector positioning on the bolt face.

The gas system length is a fair bit longer than KAC as well. At least two inches for the journal position plus the additional length from the phased array ports.

 

[rpoL98]

also curious about size of the gas block. seems to be larger than 0.750" diameter GB journal, is it a 0.875" or 0.936" gas block. It's also interesting that G didn't pin the gas block, like they did with the URGI, especially with this also being a military contract rifle. Just an observation, nothing more.

is the barrel nut steel? or aluminum? looks like steel. just asking because on the URGI it's aluminum.

thanks for the pics, and the detailed descriptions.

 

[staticTango]

Is the hux flash hider pinned and welded on? I read that under the euro optic website after ordering one — I’m hoping it isn’t.

 

[Bigjake83]

Finished.

22" 6.5CM Bartlein / Custom Contour / .875 exstended Gas Block Journal for Rifle Speed AGB / 8 Twist 4 Groove/ 5/8x24 Treads.

 

[Evolution 9]

Is the hux flash hider pinned and welded on? I read that under the euro optic website after ordering one — I’m hoping it isn’t.

No, at least mine is not. I’m sure that’s a mistake on the site.

 

[staticTango]

No, at least mine is not. I’m sure that’s a mistake on the site.

That’s great news. I would be very frustrated with a 20” $6500 rifle having a pinned and welded flash hider for no apparent reason.

 

[Evolution 9]

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Gloves are recommended if carrying outside of prone or tripod use. It’s not terrible, but the Arca rail isn’t made for human hands.

Attaching bipods and tripods wherever you want, quickly, securely, and easily is nice. I’m not sure why the same thing couldn’t be accomplished with picatinny, but I’m familiar with Arca and don’t mind.

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I found just the right environment for the fifty shades of FDE (100 miles north of Boise).


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This is my road now. Maztech is sweet.

My recoil sensitive 7 year old says it has less recoil than my AR15, and now it’s his favorite gun.

Definitely light enough for offhand shooting even with all the crap I’ve added. With a 1-8 and no other crap, this would be very reasonable. The “A” version is gonna rock.

 

[putput30]

View attachment 8745678

Gloves are recommended if carrying outside of prone or tripod use. It’s not terrible, but the Arca rail isn’t made for human hands.

View attachment 8745680

Attaching bipods and tripods wherever you want, quickly, securely, and easily is nice. I’m not sure why the same thing couldn’t be accomplished with picatinny, but I’m familiar with Arca and don’t mind.

View attachment 8745682

I found just the right environment for the fifty shades of FDE (100 miles north of Boise).


View attachment 8745683

This is my road now. Maztech is sweet.

View attachment 8745684

My recoil sensitive 7 year old says it has less recoil than my AR15, and now it’s his favorite gun.

How's it shooting for you so far and what ammo does it seem to prefer?

 

[Evolution 9]

How's it shooting for you so far and what ammo does it seem to prefer?

First group was .6 MOA, and subsequent shooting has been similar. I’ve only tried 135 grain factory loaded Berger ammo.

 

[JohnDeereGuy1996]

So. Bought a hux 762 ti flow and it was recently approved. Knew I wanted to shoot some groups with same lot of the 140 hornadys I used earlier. I absolutely shoot better with a suppresor on all firearms.

First things I want to say is I can’t believe how the can changed the recoil impulse. It’s the softest large frame by far I’ve fired. It was really soft before but this took it next level. It reminds me of a over gassed 556.

Changed the Magpul out for a b5 stock and grip which I highly prefer.

I continue to love this gun and really want a 14.5 or 16 inch version.

 

[putput30]

So. Bought a hux 762 ti flow and it was recently approved. Knew I wanted to shoot some groups with same lot of the 140 hornadys I used earlier. I absolutely shoot better with a suppresor on all firearms.

First things I want to say is I can’t believe how the can changed the recoil impulse. It’s the softest large frame by far I’ve fired. It was really soft before but this took it next level. It reminds me of a over gassed 556.

Changed the Magpul out for a b5 stock and grip which I highly prefer. View attachment 8748075View attachment 8748076
I continue to love this gun and really want a 14.5 or 16 inch version.

Good lord, a quarter moa group from a chrome lined barrel is superb. Nice shooting!

 

[TheOE800]

Good lord, a quarter moa group from a chrome lined barrel is superb. Nice shooting!

Sub 3/4” average there which is still a good rifle. I have to switch to a 6mm bolt gun to shoot consistent 1/4” groups.

 

[putput30]

Sub 3/4” average there which is still a good rifle. I have to switch to a 6mm bolt gun to shoot consistent 1/4” groups.

Im not calling it a 1'/4" moa rifle or anything like that. There's probably not too many gas guns that can hold that kind of precision repeatedly. Just commenting on that bottom left group when the stars all align.

 

[call_me_ski]

That's interesting the steal doesn't go into the Cam Pin slot where most of the wear occurs.

The cam pin should not be contacting the cam pin cut out on your rifle. Most the wear caused by the cam pin will be on the side track of the receiver where Geissele reinforced with steel. The cam pin will attempted to rotate against the aluminum in that area as the bolt closes and strips a round from the magazine. SOTAR has a breakdown of a super duty upper with 100k rounds on it that shows the wear that is experienced in the upper very well.

 

[SigFanBoi69]

Anyone have any experience running non-PMAGs? Duramags out the door for me; shit fitment and have issues feeding. Wondering if it's worth investing in KAC or Larue mags for reloads w/ max COAL.

 

[TheOE800]

Anyone have any experience running non-PMAGs? Duramags out the door for me; shit fitment and have issues feeding. Wondering if it's worth investing in KAC or Larue mags for reloads w/ max COAL.

I have been using KAC mags without issue. Haven’t tested my Duramags.

 

[NurseMeekah]

So. Bought a hux 762 ti flow and it was recently approved. Knew I wanted to shoot some groups with same lot of the 140 hornadys I used earlier. I absolutely shoot better with a suppresor on all firearms.

First things I want to say is I can’t believe how the can changed the recoil impulse. It’s the softest large frame by far I’ve fired. It was really soft before but this took it next level. It reminds me of a over gassed 556.

Changed the Magpul out for a b5 stock and grip which I highly prefer. View attachment 8748075View attachment 8748076
I continue to love this gun and really want a 14.5 or 16 inch version.

When you changed your stock out, did it have what I assume is "shim paper," under it? Mine had two layers of it.

 

[TheOE800]

When you changed your stock out, did it have what I assume is "shim paper," under it? Mine had two layers of it.

Mine did as well.

 

[JohnDeereGuy1996]

When you changed your stock out, did it have what I assume is "shim paper," under it? Mine had two layers of it.

It did! Was kind of weird lol

 

[SigFanBoi69]

Yeah, mine had some shim paper too. Helps the stock get a tighter lockup I suppose.

Also ended up deep cleaning the gun at 340 rounds. Barrel stayed surprisingly clean for not having been cleaned for 200+ rounds. Only needed 4 soaked patches w/ eliminator for it to come out clean. Extractor pin is also tight as hell and only comes out one direction.

FYI — with the 3 gas ports, make sure you rotate the rifle and shake/tap the barrel around a few times to get any solvent/oil out of the gas ports when you think the barrels clean. I had some residual solvent and blue crud leak out when I left the gun in the safe for a few days after cleaning and went to borescope it today.

 

[GUNNER10]

neat.
looks like the award went to LMT.
Lewis Machine & Tools Defense, Eldridge, Iowa, was awarded a 10-year indefinite-delivery/indefinite-quantity contract (H9240325DE003) with a maximum ceiling of $92,000,000 for medium range gas gun-assault kits

 

[JohnDeereGuy1996]

neat.
looks like the award went to LMT.
Lewis Machine & Tools Defense, Eldridge, Iowa, was awarded a 10-year indefinite-delivery/indefinite-quantity contract (H9240325DE003) with a maximum ceiling of $92,000,000 for medium range gas gun-assault kits

Came here to post this. Was hoping the geissele would win. Really wish we could get more info on these test. Would love to know what made it win. Being a socom contract we know it wasn’t because of being lowest bidder.

 

[Bigjake83]

I'd love to see some bore scope pics/videos of the gas port. I curious to see if they did the same finishing work like they did on thier cut barrels.

 

[putput30]

I'd love to see some bore scope pics/videos of the gas port. I curious to see if they did the same finishing work like they did on thier cut barrels.

Here's a link to a video showing the gas ports, I think there's roughly 150 round through this example.

Regarding the MRGG-A contract, hopefully it means giessele releases their 14.5 version sooner because I want that upper.

 

[Bigjake83]

Here's a link to a video showing the gas ports, I think there's roughly 150 round through this example.

Regarding the MRGG-A contract, hopefully it means giessele releases their 14.5 version sooner because I want that upper.

Thank you.

 

[TheOE800]

neat.
looks like the award went to LMT.
Lewis Machine & Tools Defense, Eldridge, Iowa, was awarded a 10-year indefinite-delivery/indefinite-quantity contract (H9240325DE003) with a maximum ceiling of $92,000,000 for medium range gas gun-assault kits

Seems a poor acquisition strategy to split vendors and use two distinct platforms with proprietary parts (not to mention the KAC stuff too).

 

[matt33]

Came here to post this. Was hoping the geissele would win. Really wish we could get more info on these test. Would love to know what made it win. Being a socom contract we know it wasn’t because of being lowest bidder.

It seems like this is military and government procurement epitomized.

I love my LMT rifles, and I'm happy they were awarded a contract with the US military. That said, it seems like it makes all the sense in the world to use the same platform for both the assaulter and the sniper versions.

I love what I've read about the Geissele, I'm going to pick up a GFR and the mrgg-s down the road

 

[Happiness Is A Warm Gun]

What barrel profile does the LMT that just won the socom contract have? Is it what LMT calls a lightweight, which is really more of a midweight? Anyone know what the weight of the geissele and lmt assaulter rifles are?

 

[matt33]

What barrel profile does the LMT that just won the socom contract have? Is it what LMT calls a lightweight, which is really more of a midweight? Anyone know what the weight of the geissele and lmt assaulter rifles are?

I'm pretty sure it is their standard weight, stainless steel 5r cut rifle 14.5"

My LMT 6.5 20" stainless steel 5R cut rifled barrel actually shoots really well for a factory AR10 barrel, consistently under 1 MOA with Berger 130g Hybrids after I got a couple hundred rounds through it

 

[Genesis1984]

I'll be picking mine up tomorrow. Ill throw in my two cents initially and than after I break in the barrel (Geissele says 200 rounds but we will see if that makes a difference). It's good to see they are performing up to the expectations and hopefully the 14.5 mrgg-a gets released soonish once my bank account recovers.

You mean the lmt? They won the 14.5, not geissele.

 

[Genesis1984]

It looks awesome, but I think the SP10 is still beating the Geissele MRGG for accuracy by a healthy margin, and probably with less POI shift from positional shooting. So what am I missing?

You can suck off the sp10 all you want, that doesn't make it true. I think your missing that your bias has tainted your view.

 

[Genesis1984]

I've got the new 22" Bartlein installed in my LaRue MRGG, I'll post some pics tomorrow when it's all put back together.

Paul made the barrel extension oversized and when mating up with the SAMS steal insert has made for a incredible rigid barrel interface.



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"Dis larue is great once you replace the important shit" fucking stupid

 

[putput30]

You mean the lmt? They won the 14.5, not geissele.

I was just talking about geisseles entry for the mrgg-a. I posted that before a winner was announced. I have the 20 inch geissele with about 100 rounds through it, and I want a 14.5 upper to go along with it.

 

[White_Shark]

I have my SP10s for long range, so MRGG-S doesn’t quite fit the roll for the price difference, but I would jump on a 16” geissele “MRGG” pretty damn fast if it still has the CHF CL barrel and sub MOA accuracy. I see them available for backorder on Eurooptic, but pulled a 30% off code from a match for Geissele, so hopefully it hits their website sometime before the next decade.