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SR25 Upper Compatibility

7 of these in-stock as I am writing this. For anyone who missed the SR-25 cartel uppers I think this is them… just sent them a message to confirm.

Edit. These are the SR-25 cartel uppers. Ready to ship.

 
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7 of these in-stock as I am writing this. For anyone who missed the SR-25 cartel uppers I think this is them… just sent them a message to confirm.

Edit. These are the SR-25 cartel uppers. Ready to ship.

I really like what those guys are doing,

Has anybody figured out a solution for handguards that doesn't involve GB.
 
My latest build. Courtesy SR 25 cartel.

SR-25 cartel upper
LMT MARs H lower
14” KAC URX4 hardguard
16” Craddock 6.5 Creedmoor (Bartlein blank)
 

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the Stags do look really good all put together… did this one just for fun and to use up some extra parts from all my builds…

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Nice. Also, I think PSA’s new Sabre 10 (billet) line are sr25 pattern
Yep. Needs to be test fit say for sure… who would have though Danielle Defense and Wilson combat we’re not standard AR 10 cut


but credit where credit is due… PSA has made a few notable products in recent years… this might be one.
 
I did some fitting work to the SMF tactical upper to get the lines to match up better with the LMT lower. Really, I just broke some edges and trimmed some overhang but it made a huge difference and I am really happy with how it turned out.

Again… this did function without modification. I just wanted the lines to match up a bit better.
View attachment 7815857View attachment 7815858View attachment 7815859View attachment 7815860

Basically I just put sharpie on the upper (Like layout fluid) and scribed some line, then use files to remove extra material. SO long as you take you time and have a some file (And a few different shapes) this is no difficult. It just requires patience.
View attachment 7815867View attachment 7815868View attachment 7815870View attachment 7815871


Here is some shots during and after paint. (Paint is Aervoe brand and the color is Sand) Oh and that LMT blem marking is 🤌

View attachment 7815863View attachment 7815864View attachment 7815865View attachment 7815884View attachment 7815885
Just a data point for others referencing this. I am working on a very similar build. I used the SMF tactical upper and MARS-H, but I was not so lucky. The lines match up nicely (like you said, a little trimming makes it even better, but I'm happy with the aesthetic. Got the gun together last night and found a functional problem with the upper/lower combo. The bore of my SMF upper sits lower than the receiver extension in my LMT lower. The BCG is not able to move freely between the upper and lower.

I'll get an LMT (and maybe Stag) upper on the gun and confirm that the SMF upper is the problem. Maybe they've changed their design, maybe I ended up with a lemon.
 
Just a data point for others referencing this. I am working on a very similar build. I used the SMF tactical upper and MARS-H, but I was not so lucky. The lines match up nicely (like you said, a little trimming makes it even better, but I'm happy with the aesthetic. Got the gun together last night and found a functional problem with the upper/lower combo. The bore of my SMF upper sits lower than the receiver extension in my LMT lower. The BCG is not able to move freely between the upper and lower.

I'll get an LMT (and maybe Stag) upper on the gun and confirm that the SMF upper is the problem. Maybe they've changed their design, maybe I ended up with a lemon.

I got an extra stag upper if you are looking 😜
 
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Just a data point for others referencing this. I am working on a very similar build. I used the SMF tactical upper and MARS-H, but I was not so lucky. The lines match up nicely (like you said, a little trimming makes it even better, but I'm happy with the aesthetic. Got the gun together last night and found a functional problem with the upper/lower combo. The bore of my SMF upper sits lower than the receiver extension in my LMT lower. The BCG is not able to move freely between the upper and lower.

I'll get an LMT (and maybe Stag) upper on the gun and confirm that the SMF upper is the problem. Maybe they've changed their design, maybe I ended up with a lemon.
Don’t sleep on those Cartel uppers… they are available and the fit is exactly what we were all looking for. They are expensive… but worth it IMO.
 
Don’t sleep on those Cartel uppers… they are available and the fit is exactly what we were all looking for. They are expensive… but worth it IMO.
Some folks on reddit were a little disappointed. Sounds like they purposefully mismatched the lines so that they couldn't be mistaken for Knights uppers?

I was following along during their development with much interest, but 600 bones is a lot for a stripped upper.
 
Some folks on reddit were a little disappointed. Sounds like they purposefully mismatched the lines so that they couldn't be mistaken for Knights uppers?

I was following along during their development with much interest, but 600 bones is a lot for a stripped upper.
It is… I am sure you can tell the difference and 600 is a lot. But the fit IMO is great. I have mine on a knights lower now.
 
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Just a data point for others referencing this. I am working on a very similar build. I used the SMF tactical upper and MARS-H, but I was not so lucky. The lines match up nicely (like you said, a little trimming makes it even better, but I'm happy with the aesthetic. Got the gun together last night and found a functional problem with the upper/lower combo. The bore of my SMF upper sits lower than the receiver extension in my LMT lower. The BCG is not able to move freely between the upper and lower.

I'll get an LMT (and maybe Stag) upper on the gun and confirm that the SMF upper is the problem. Maybe they've changed their design, maybe I ended up with a lemon.
sounds like the SMF is a lemon. I ran an SMF TAC-10 on a MWS lower and they worked beautifully. I bet SMF will make it right. Centurion Arms is also redeveloping their MK11 receivers and will have ambi controls, etc. I'm thinking it'll drop this year.
 
sounds like the SMF is a lemon. I ran an SMF TAC-10 on a MWS lower and they worked beautifully. I bet SMF will make it right. Centurion Arms is also redeveloping their MK11 receivers and will have ambi controls, etc. I'm thinking it'll drop this year.
I would definitely reach out to SMF. The people I spoke with on the phone were incredibly nice. I am sure they would take care of it.
 
Do the Larue ultimate uppers take a standard barrel format, or are they proprietary?

I also got a couple blowout Larue lowers and am debating what upper route to take.
My understanding from other posters here is that you've always been able to rebarrel a LaRue with a typical large frame AR barrel but I'm not 100% on this. It seems there's more differences in the carriers than there is with the barrel extensions.

LaRue I thought claimed that their extensions were unique to them but others here have rebarreled LaRue large frames.
 
You should be able to use any SR-25 slant cut on a Larue. Just note Armalite AR-10A upper holes (.274") are smaller than KAC - LMT - Stag (.277) and will need slight reaming.

Here are Knight and Larue uppers swapped on each others' lowers:

Larue_KAC swap.jpg



Stripped Stag-10 uppers are around $180:

1710885909484.png


Diamondback DB-10s around $100 (I think they're Armalite pin size -- they fit on both AR-10As and Bs):
DB-10Upper.jpg
 
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Here's a few pics of of an SR25 Cartel and a Genesis upper on a LMT Defender H lower. I did try a stag but didn't want to ream the pin holes as I'm running the forward controls pins (.280) otherwise the stag fit okay. I do think these two fit the LMT better.

SR-25 Cartel upper
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Genesis Upper on LMT Defender H lower.
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SR25 Cartel stripped on the table.
 
This might be a dumb question, but on the list for an MGL110, thinking I'm going to build the upper out instead of trying to use the Sabre10. What Can I use any rail on an SR25 Pattern upper? URX is unobtainable. So trying to figure out what my rail options are to look similar to the m110.
 
This might be a dumb question, but on the list for an MGL110, thinking I'm going to build the upper out instead of trying to use the Sabre10. What Can I use any rail on an SR25 Pattern upper? URX is unobtainable. So trying to figure out what my rail options are to look similar to the m110.
DPMS high pattern rails for SR25-spec receiver.
 
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This might be a dumb question, but on the list for an MGL110, thinking I'm going to build the upper out instead of trying to use the Sabre10. What Can I use any rail on an SR25 Pattern upper? URX is unobtainable. So trying to figure out what my rail options are to look similar to the m110.
The aero precision m5 atlas r-one will fit dpms high rails. It’s what I’m using on my sr25 cartel upper
 
Samson Star10
STAR10-13-2_640x640.png

SLR Helix Quad
HELIX_14.87_Q__28856.1573539967.jpg
Samson is too long I believe and I dunno that I could stomach the look of either for what I'm going for. (m110) I spent most of the last 12 hours looking till 6:30am this morning actually lol. Just going to grab and LMT quad HTX barrel, gas block, and copy MMM's build with the griffin MGL110.
 
You should be able to use any SR-25 slant cut on a Larue. Just note Armalite AR-10A upper holes (.274") are smaller than KAC - LMT - Stag (.277) and will need slight reaming.

Here are Knight and Larue uppers swapped on each others' lowers:

View attachment 8376707


Stripped Stag-10 uppers are around $180:

View attachment 8376716

Diamondback DB-10s around $100 (I think they're Armalite pin size -- they fit on both AR-10As and Bs):
View attachment 8376730
I know that Diamondback ships their lowers with pins, I also learned the hard way their bolt catch is proprietary to their lowers. Uppers can be ordered with either 16 or 18 TPI threads & their handguards come with both barrel nuts. I'm thinking real hard about an 8.6 blk pistol upper build, common sense should dictate that I just build a 300 blk based on ammo prices alone, then the added 338 can should make it a no brainier, you would think...
 
Samson is too long I believe and I dunno that I could stomach the look of either for what I'm going for. (m110) I spent most of the last 12 hours looking till 6:30am this morning actually lol. Just going to grab and LMT quad HTX barrel, gas block, and copy MMM's build with the griffin MGL110.
I tried the Samson, was not what I was looking for but length was good. I ended up putting it on a stag and selling the whole thing.

Knights SR25 rails pop up from time to time on operation parts but you basically have to be standing or get lucky to grab one. I got a URX 3.1 back when they were still easy to find. Secondary market is high but not as crazy as it was a year ago.
 

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Sid, I traded a Criterion barrel to a guy from arfcom and tacswap. He's got a listing where he had two or three of them.

Yes, same pin sizes for KAC-LMT. The rear pin boss is correct for the KAC lower pocket, just a skoshi wide for the LMT (will probably need very light sanding).

Troy competed for a SOCOM MK 11 contract. They still carry a complete rifle but I don't know if they're releasing stripped uppers and lowers.
troy MK11.jpg

I'm building a 7.62 on an LMT MWS lower, waiting for John Scandale at Keystone Precision in Pennsylvania to contour a Krieger M24 blank. It will direct-mount an Allen Engineering AEM5-30 suppressor. She'll be heavy but I want this one for suppressed precision rather than swing-ability.

I see from your other thread you whack pigs and coyotes. I'd try a Lothar-Walther stainless Var-Tac barrel. My young nephew has gone all-in on 6.5 Creedmoor but I am old and invested in 7.62.
 
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Here ya go ......
Looks like they're only sold as sets. Mixed manufacturer compatibility probably has the same issues as other SR25 pattern upper/lowers .
 
Nice to hsve all this information in one spot (y)

One thing I’ve always liked about the AR-10s is not requiring cantilevered scope mounts.

IMG_4544.jpeg


But then, you have these guys who probably never got the memo :ROFLMAO:
 
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