TacBlade Posted October 9, 2010 Report Share Posted October 9, 2010 I have started to piece together my .308 AR. I have a CMMG lower with a DPMS upper. The upper has a JP/Viking Tactical rifle length Freefloat forearm with a full rail on top and 2" rail on the bottom. I have a Miad Grip kit in CB and a VLTOR IMOD for a Stock to put on. The lower has a DPMS parts group. I have yet to get a Bolt and Bolt carrier, Buffer and Spring, Barrel and a scope mount and scope. I slapped on the flip up sites for now. Its a little quiet over here so I thought I would post something up. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 9, 2010 Report Share Posted October 9, 2010 That thing looks good already. <thumbsup>Watch out the the MIAD - I'm not sure how CMMG does the takedown detent, but if it's under the grip (and not through the back, like an AR-15), you'll probably have to set-screw it. Very simple process, if that's the case. No worries. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 9, 2010 Author Report Share Posted October 9, 2010 The takedown detent is under the grip. It is a small problem putting the MIAD on, but I pushed the grip down just right and got it to work!! So what is this about a set screw? Im thinking that you tap the small hole where the spring goes in and put a set screw on top of the spring to hold it in. That would work, if that is what you are saying? Let me know and let me know the size of the hole and set screw if you already got that also...Thanks..... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 10, 2010 Report Share Posted October 10, 2010 So what is this about a set screw? Im thinking that you tap the small hole where the spring goes in and put a set screw on top of the spring to hold it in. Read this whole thread through - it explains how to do it with a 4-40 set screw, and with a 6-32 set screw. Pics are there for the 4-40, but I didn't add any pics of mine with the 6-32. If there's any questions, fire them off in this thread and I'll get right on them. <thumbsup>http://308ar.com/forum/index.php/topic,74.0.html Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 10, 2010 Author Report Share Posted October 10, 2010 That is a great idea! I will be doing that to mine. Also, my selector switch turns from safe to fire and back, very hard? It looks like the surface of the selector switch where the pin rides is very rough and the pin tip is kind of chewed up. Should I replace both of these? It works fine, but is hard to turn? Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 10, 2010 Author Report Share Posted October 10, 2010 I added pics with my IMOD and MIAD and Magpul Rails. Quote Link to comment Share on other sites More sharing options...
buc378 Posted October 10, 2010 Report Share Posted October 10, 2010 thats a looker.bet yah it will be a shooter to. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 24, 2010 Author Report Share Posted October 24, 2010 I got my Larue Gas Block, Kaiser 16" Barrel with Mid length Gas tube, Smith Enterprise Flash Hider. I am putting it all together today and should have some pics up tomorrow. I still have to figure out if the JP Bolt group is worth the money. It says it calms the felt recoil with their buffer, but not sure without the buffer. I have one of the HeavyBuffers with a spring coming also. Its all finally coming together. Also, I have to get a mount and a scope or just shoot it with my flip up sites for now. I will get the pics up tomorrow though...Thanks!!! I have to go watch the Steelers kick some ass right now!!! Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 24, 2010 Report Share Posted October 24, 2010 Curious to see how the 16" barrel performs with a midlength gas system - did you happen to take a measurement of the gas hole diameter in the barrel before you put it together? Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 24, 2010 Author Report Share Posted October 24, 2010 Should I measure it? I do not have the Gas Block on yet? It is smaller then the hole in the Gas Block? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 24, 2010 Report Share Posted October 24, 2010 It should be smaller than the hole on the gas block - gas blocks are made to accomodate everything, so it's "worst case scenario" with the holes in them. Made as large as the largest possible drilling of a gas port on a barrel. That way they work on everything out there.I'm just curious about that gas system on a 16" .308 barrel. Gas port size would be critical the shorter you go on the gas system. The 16" Fulton Kreiger barrel with rifle-length gas is the testament to short .308 barrels and long gas systems - with your setup, I'd just like to know what they did with the gas port size in the barrel. If the gas block hasn't been mounted yet, and you can still measure it, that would be very cool. <thumbsup> Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 24, 2010 Author Report Share Posted October 24, 2010 It is 1/16" Is that the standard size? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 25, 2010 Report Share Posted October 25, 2010 Hmmm... That's 0.0625". Seems small when I think of AR-15 gas port sizes, but this is a .308. survivalshop (hope you're reading this, man! ;D) - did you happen to measure your gas port hole in your 16" Fulton Krieger rifle-gas barrel? Again guys, this isn't major - it's just my curiousity. :o Nothing bad, I'm just trying to see what the different manufacturers are doing. my Fulton Krieger 18.5" barrel kicks like Van Damme, and I didn't think to measure the gas port hole before I put it all together. I do on every other build since then, though. <thumbsup> Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 25, 2010 Author Report Share Posted October 25, 2010 Hmmm... That's 0.0625". Seems small when I think of AR-15 gas port sizes, but this is a .308. survivalshop (hope you're reading this, man! ;D) - did you happen to measure your gas port hole in your 16" Fulton Krieger rifle-gas barrel? Again guys, this isn't major - it's just my curiousity. :o Nothing bad, I'm just trying to see what the different manufacturers are doing. my Fulton Krieger 18.5" barrel kicks like Van Damme, and I didn't think to measure the gas port hole before I put it all together. I do on every other build since then, though. <thumbsup>What is your thoughts on the JP Bolt Group? I am thinking of picking one up for this build? I think the finish is much better than any others out there for wear and tear? As far as the low mass part, it may lessen the felt recoil and adding that to my "HeavyBuffer" setup I have coming, it may make a difference? What do you think? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 25, 2010 Report Share Posted October 25, 2010 I'm pretty sure that if you use the JP Low Mass bolt carrier, you need to use the rest of the parts that are designed as the group. The whole Low Mass Operating System, so Low Mass Buffer and buffer spring, too. Just having a light carrier would make the thing kick more, I'd think. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted October 25, 2010 Report Share Posted October 25, 2010 Hmmm... That's 0.0625". Seems small when I think of AR-15 gas port sizes, but this is a .308. survivalshop (hope you're reading this, man! ;D) - did you happen to measure your gas port hole in your 16" Fulton Krieger rifle-gas barrel? Again guys, this isn't major - it's just my curiousity. :o Nothing bad, I'm just trying to see what the different manufacturers are doing. my Fulton Krieger 18.5" barrel kicks like Van Damme, and I didn't think to measure the gas port hole before I put it all together. I do on every other build since then, though. <thumbsup>Nope , didn't measure it , but did have a drill bit in it to measure the distance from the hole to the barrel shoulder. Just don't remember the drill bit size . I know it was in between two of them & I had to use the smaller one to take my measurement.I will measure it ,if I take the gas block off again.My 16" HB kicks more than my 20 " HB , but I have a brake on the 20" & just a FS on the 16" & its not bad at all. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 25, 2010 Author Report Share Posted October 25, 2010 I'm pretty sure that if you use the JP Low Mass bolt carrier, you need to use the rest of the parts that are designed as the group. The whole Low Mass Operating System, so Low Mass Buffer and buffer spring, too. Just having a light carrier would make the thing kick more, I'd think.You have to use their Bolt, if you use their Bolt carrier. You do not have to use their Spring and Buffer. But you can use their upgraded Bolt in any DPMS style Bolt Carrier. I believe that is why Brownells now sells their Bolt by itself, so you can use it in your Bolt carrier. It may very well, not work as good without their spring and buffer though. I think I will give them a call before I go and buy one and see what they have to say. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 25, 2010 Author Report Share Posted October 25, 2010 BAM!!!!!!!! I just ordered the JP Bolt and Bolt Carrier Group!!!! They told me to get the full benifit of the Low Mass Bolt Carrier, was to use an Adjustable Gas Block and lower the Gas needed to push it back and that will reduce felt recoil...I don't have an adjustable one right now, but I am going to fire mine without one and switch it over to an adjustable one to see what the difference is. Quote Link to comment Share on other sites More sharing options...
imschur Posted October 25, 2010 Report Share Posted October 25, 2010 How long is the lead time? I tried this in the past and gave up. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 25, 2010 Author Report Share Posted October 25, 2010 Good Queation? I never ever asked, I just assumed they had them on hand. I guess I will have to call them back? Quote Link to comment Share on other sites More sharing options...
imschur Posted October 25, 2010 Report Share Posted October 25, 2010 Yeah you should, but perhaps they have finally caught up. Quote Link to comment Share on other sites More sharing options...
TacBlade Posted October 25, 2010 Author Report Share Posted October 25, 2010 Got it together! Just need the bolt group to fire it!Crappy, Crappy Pictures!!! Sorry about that, I just snapped them quick in the kitchen!DPMS upperKaiser 16" Barrel with Mid Length Gas holeLarue Gas BlockJP VTAC rifle length handguard with full length top rail, 2" and 4" bottom railSmith Vortex Flash hiderMagpul forgripCMMG lowerDPMS lower parts groupMagpul IMOD stockMagpul MIAD gripMagpul 20 rnd PmagStandard Trigger with J & L Research Drop In Trigger AdjusterJP Bolt carrier and Bolt (In Route, I Hope)I'm thinking I will go with the JP scope mount and "What Scope?" is the question for me? Quote Link to comment Share on other sites More sharing options...
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