JaSSon Posted April 7, 2011 Report Share Posted April 7, 2011 LRB Arms upper and lower with Daniel Defense parts kit Daniel Defense 16" M4 profile barrel. Chrome lined chamber and bore, chambered in 5.5 NATO. 1:7 twist, DD low profile gas block Daniel Defense BCG BCM charging handle (pre-production, Gunfighter medium), BCM forward assist, BCM gas tube Yankee Hill Spectre length diamond FF hand guard. A2 flash suppressor Magpul Pmag, Magpul MOE stock CAA (cheap, generic) vertical foregrip Primary Arms M3 style red dot with QD 3x magnifier (not pictured) The rifle is basically finished. I'm going to add some BUIS, rail covers, and eventually a Surefire. http://i119.photobucket.com/albums/o149/loaded321/AR15/th_P4010031.jpg http://i119.photobucket.com/albums/o149/loaded321/AR15/th_P4010030.jpg http://i119.photobucket.com/albums/o149/loaded321/AR15/th_P4010029.jpg http://i119.photobucket.com/albums/o149/loaded321/AR15/th_P4010028.jpg http://i119.photobucket.com/albums/o149/loaded321/AR15/th_P4010027.jpg Quote Link to comment Share on other sites More sharing options...
stangsn95gt Posted April 7, 2011 Report Share Posted April 7, 2011 Looks good Quote Link to comment Share on other sites More sharing options...
stolen 5.0 Posted April 7, 2011 Report Share Posted April 7, 2011 sweet, i think i'm ready to build or buy another one. I want something with a nice red dot setup Quote Link to comment Share on other sites More sharing options...
Jelloman4571647545499 Posted April 8, 2011 Report Share Posted April 8, 2011 Looks good Jason. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 21, 2011 Author Report Share Posted April 21, 2011 Yay for rail covers! http://i119.photobucket.com/albums/o149/loaded321/AR15/dcb294e0.jpg They're Magpul XTM in black and flat dark earth. Quote Link to comment Share on other sites More sharing options...
verse Posted April 21, 2011 Report Share Posted April 21, 2011 Nice looking AR Quote Link to comment Share on other sites More sharing options...
stangsn95gt Posted April 21, 2011 Report Share Posted April 21, 2011 How do you like that mount for the red dot it seems to mount it a bit high Quote Link to comment Share on other sites More sharing options...
smokinHawk1647545499 Posted April 21, 2011 Report Share Posted April 21, 2011 looks similar to mine, except the optics, grip and rail covers. first you want a car like mine now this.... Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 22, 2011 Author Report Share Posted April 22, 2011 looks similar to mine, except the optics, grip and rail covers. first you want a car like mine now this.... So, the specs are the same on paper, but otherwise it's completely different? :-P Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 29, 2011 Author Report Share Posted April 29, 2011 Gay. My gun won't cycle with inexpensive ammo. Ordered some 55gr PMC Bronze .223 for plinking. Some reading indicates the DD carbine barrels tend to have an under sized gas port. Looks like I'm going to have to drill it out a bit. Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted April 29, 2011 Report Share Posted April 29, 2011 What buffer/spring are you running? If you're running a carbine spring or a pretty heavy buffer, I'd try swapping those out to a lighter version first before I resorted to drilling anything. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 30, 2011 Author Report Share Posted April 30, 2011 http://www.aimsurplus.com/product.aspx?item=XDSABK&name=DSA+Complete+Buffer+Tube+kit&groupid=53 That's exactly what I'm using. Just standard Milspec buffer and spring. I'm using a DD barrel and DD low profile gasblock. The barrel has a dimple on the bottom for alignment, so I'm pretty sure that's not the issue. Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted April 30, 2011 Report Share Posted April 30, 2011 I assume its short stroking? I'd venture to say you have a carbine spring in there. Buy a mid length or rifle spring to see if that helps. Does your buffer have an 'H' stamped on it? Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 30, 2011 Author Report Share Posted April 30, 2011 Yeah, it's short stroking. 80% of the time it ejects the spent casing, but doesn't load the next round, 5% of the time it doesn't even eject the round, 10% of the time the round overshoots the feed ramps and ends up jammed to the point I have to drop the mag. Best it shot was 5 rounds in a row after a quick lube up. Went thru 4 mags (120rds) and the bolt never locked open on empty once. I'll check the buffer this weekend. You think I'd need to go to a lighter buffer? What size should the gas port be? I've read some are manufactured to .055" and spec was .065" for the carbine. People are using a 1/16" drill bit to take out just a bit of material. And that's on an identical barrel. Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted April 30, 2011 Report Share Posted April 30, 2011 If try a lighter spring first as that's the cheapest, then the buffer. It that doesn't work, i would possibly consider drilling if that's a known problem but if you have a Daniel defense barrel, I find it hard to believe there's a problem. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 30, 2011 Author Report Share Posted April 30, 2011 If try a lighter spring first as that's the cheapest, then the buffer. It that doesn't work, i would possibly consider drilling if that's a known problem but if you have a Daniel defense barrel, I find it hard to believe there's a problem. Midlength spring mayhaps? Anyplace sell them locally? Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted April 30, 2011 Report Share Posted April 30, 2011 Midlength spring mayhaps? Anyplace sell them locally? A midlength might work. I'm not sure who sells them locally though. Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 30, 2011 Author Report Share Posted April 30, 2011 I'm going to tape a few coils together to simulate a lighter spring. See if it cycles that way. The buffer itself has no markings at all. Weighed on a digital scale it reads 3.0oz. Quote Link to comment Share on other sites More sharing options...
RedRocket1647545505 Posted April 30, 2011 Report Share Posted April 30, 2011 If it weighs 3.0oz then you've got a standard carbine buffer, which is the lightest they make for your application. I'd mess with the spring a little bit and see if that helps. BTW, I assume this is a well cleaned and lubed gun? Quote Link to comment Share on other sites More sharing options...
JaSSon Posted April 30, 2011 Author Report Share Posted April 30, 2011 Yes, cleaned and lubed, well it was. Just went thru a few mags. Taped 6 coils together and installed the spring so those were at the end of the buffer tube. Rounds used: .223 PMC Bronze 55gr, 5.56 Federated XM193F 55gr M193 ball Unmodified carbine spring: already know it won't cycle the PMC .223, fed a full mag of the 5.56 Fed with 0 malfunctions. Modified carbine spring:similar malfunctions with the .223 PMC. Fed a whole mag of 5.56 Fed with 0 malfunctions, but did not lock bolt open when empty. I'm inclined to think it's not the spring, since the "lighter" spring actually performed worse with the 5.56. Also learned that the PMC bronze is crap. Quote Link to comment Share on other sites More sharing options...
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