HOTCOFFEE Posted August 2, 2014 Report Share Posted August 2, 2014 Howdy boyz............has anyone here tried the CMMG MK3 LR308 upper receiver ? I have been trying to get a 15" free float hand guard for my DPMS LR308 and it has become a PITA due to DPMS's vast array of multiple upper receiver heights.... I thought I had found the FF hand guard that would fit my upper but, alas, this was not to be (as you can see in the photo). Well, since I really like the CMMG MK3 hand guard, especially with the "keyhole" feature for added pic rails, I'm thinking about getting the CMMG MK3 LR308 upper receiver and be done with it. I called CMMG tech service and they have been really good to deal with so far. They will be changing their website to reflect the added "will not fit" DPMS upper and will let me return the hand guard for a refund. I ask them specifically if the MK3 hand guard will properly fit their MK3 upper receiver and they said it would. I told them that I would consider buying the MK3 upper if, my DPMS BCG, BCM Gunfigther 7.62 charging handle and DPMS barrel could be used with it............waiting on a reply. Any thoughts, comments, suggestions will be greatly appreciated...... Thanks, HC Quote Link to comment Share on other sites More sharing options...
blue109 Posted August 2, 2014 Report Share Posted August 2, 2014 you most likely have the DPMS "low" and need a rail designed for that. Midwest, Troy, Samson, and a few others make compatible rails. keymod as well. far as CMMG, quality seems to be hit or miss overall. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted August 2, 2014 Report Share Posted August 2, 2014 (edited) There is a sticky around here on how to measure your upper to get the right hand guard for it . There are quite a few good ones out there as was said above. There is a super high top one for there target rifles & I don't have the dimensions on that one , but below is the difference from the old higher rail height & there new , lower height. Edited August 2, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
guruofhotrod Posted August 3, 2014 Report Share Posted August 3, 2014 There is a super high top one for there target rifles & I don't have the dimensions on that one There are some pics of the super high top upper in this thread: Quote Link to comment Share on other sites More sharing options...
shibiwan Posted August 3, 2014 Report Share Posted August 3, 2014 You want a complete set? CMMG is running a dealer special right now on complete MK3 upper/lower sets. Quote Link to comment Share on other sites More sharing options...
HOTCOFFEE Posted August 3, 2014 Author Report Share Posted August 3, 2014 There are some pics of the super high top upper in this thread: Yep.......that's the one I have, unfortunately. I do not want a complete upper. All I need is the "stripped" upper receiver. If the CMMG MK3 is not compatible with BCG and charging handle I already have, then I will regroup and go to plan B......... HC Quote Link to comment Share on other sites More sharing options...
blue109 Posted August 3, 2014 Report Share Posted August 3, 2014 I heard a rumor master shibi was working on a rail for that rcvr..... better get it together before everyone sells off their hi tops shib. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted August 3, 2014 Report Share Posted August 3, 2014 I believe the CMMG 's are DPMS platform rifles & you should be able to just swap uppers receivers out & depends on the matching rail height of the Hand guard you have. What rail height does it match up to , as shown in the photo I posted . Thats if you care about a little rail difference between the upper & hand guard. This shows the difference in rail heights of the low profile of the new DPMS upper receive rail height & a JP hand guard that is the old height . This rifle had a SI Defense upper on it that has the old rail height & I replaced it with a Tactical Machining 308 upper with the newer DPMS rail height . Confusing isn't the right word . To me , the old & new mean nothing , its cosmetic is all . This is with the SI Defense upper on it . There are a bunch of manufacturers that make both format's out there , CMMG is just one of them. Quote Link to comment Share on other sites More sharing options...
blue109 Posted August 3, 2014 Report Share Posted August 3, 2014 do we have a sticky for DPMS rail heights? it comes up weekly. something to just link people to might be a good idea. no discussion..just a run down. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted August 3, 2014 Report Share Posted August 3, 2014 do we have a sticky for DPMS rail heights? it comes up weekly. something to just link people to might be a good idea. no discussion..just a run down. Yep, we do - right at the very top of this section, pinned: Quote Link to comment Share on other sites More sharing options...
blue109 Posted August 3, 2014 Report Share Posted August 3, 2014 ha. I only browse on my phone, and just look at new posts. never look at the whole forum anymore Quote Link to comment Share on other sites More sharing options...
unforgiven Posted August 3, 2014 Report Share Posted August 3, 2014 Funny G&A felt that CMMG MK3 was the cat's meow. <dontknow> Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted August 4, 2014 Report Share Posted August 4, 2014 Funny G&A felt that CMMG MK3 was the cat's meow. <dontknow> I just read that issue. Still waiting for someone to get excited over the Stag 9mm ars Quote Link to comment Share on other sites More sharing options...
unforgiven Posted August 4, 2014 Report Share Posted August 4, 2014 I liked that 9mm Stag rifle,they never said anything about price or magazine availability.Interesting the barrel had a 10-1 twist for 9mm. <dontknow> Quote Link to comment Share on other sites More sharing options...
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