NTXshooter Posted March 25, 2014 Report Posted March 25, 2014 OK, so I am building my first AR and I chose to build it in .308. I want something with more punch for Texas hogs. I have the lower built, the barrel and gas block are on the upper. This is a mid-length gas system. I go to install the Magpul MOE handguard and it is 1/4" too long. I followed the instructions for tightening the barrel nut. Torqued to 30 ftlbs. and backed it off 3 times before I tightened it up and lined up the gas tube. For the life of me, I cannot figure out what is off by that much. Here is the list of parts on the upper: DPMS Complete upper receiver CMMG bolt carrier group JP railed adjustable gas block and gas tube Mega Arms 18" .308 barrel mid-length gas (purchased from Rainier Arms) Barrel nut and Delta Ring Assembly (purchased from Rainier Arms) Triangular end cap (fits the Magpul MOE when not on the rifle) Magpul MOE mid-length handguard Any insight would be greatly appreciated.
shibiwan Posted March 25, 2014 Report Posted March 25, 2014 Welcome to the forum! I think the issue is the non-standardization of parts for the .308 platform. The MOE is designed around the AR-15 so I would expect stuff not to fit correctly.
unforgiven Posted March 25, 2014 Report Posted March 25, 2014 If it's the sheetmetal that's hanging up,I think one of the guy's put some tin snips to it to make it work. <dontknow>
98Z5V Posted March 25, 2014 Report Posted March 25, 2014 JP railed adjustable gas block and gas tube You can always move this gas block forward on the barrel, if necessary.
NTXshooter Posted March 25, 2014 Author Report Posted March 25, 2014 Thanks for the ideas. I looked at moving the gas block but there is no play in it. A couple of thousandths, and it will be misaligned. I guess I am going to have to take a dremel to it and see if I can make it fit. The mid-length gas tube fit just fine so it surprises me that the handguard is that far off. I'll get started on it tonight.
NTXshooter Posted March 26, 2014 Author Report Posted March 26, 2014 Here's an update, after 3 hours of tweaking and fitting, i still couldn't get it to fit. Found out today from Rainier Arms that it won't fit at all. Trying to figure our plan B. Any ideas on a lightweight handguard that I can use with my railed JP gas block and get in DFE or tan?
lakeracer69 Posted March 26, 2014 Report Posted March 26, 2014 You might want to toque the barrel nut more before you finalize any assembly, 30 pounds is a little low.
NTXshooter Posted March 27, 2014 Author Report Posted March 27, 2014 Final torque on the barrel nut is somewhere between 60 and 70. Thanks for the input.
unforgiven Posted March 27, 2014 Report Posted March 27, 2014 Some pics on the problem would be helpful brother.Just sayin.
NTXshooter Posted April 3, 2014 Author Report Posted April 3, 2014 Ok, since the Magpul MOE would not fit (couldn't get any pics that really showed the problem). I went with Plan B. An APEX 15" Free Float Handguard. I think it turned out great. I'm thinking that I will have to paint or Cerokote the handguard FDE to match the stock and the grip. Here's the final list of parts Stripped Lower - Shadow Ops Weaponry Lower Parts Kit - CMMG Butt Stock - Magpul CTR Buffer - JP Enterprises Silent Captured Spring Grip - ERGO Upper Receiver - DPMS BCG - CMMG Barrel - Mega 18" 1:10 Gas Block - JP Enterprises Adjustable Free Float Tube - APEX 2360 Compensator - Miculek <thumbsup> Thanks to everyone who helped on this thread and all the others that I read but didn't post.
unforgiven Posted April 3, 2014 Report Posted April 3, 2014 I like the look brother. <thumbsup> I also use the same scope mount.For the money on a 1" tube not a bad deal.
washguy Posted April 3, 2014 Report Posted April 3, 2014 NTX now you got something to be proud of...Apex is a fine piece ! :) Wash
shibiwan Posted April 3, 2014 Report Posted April 3, 2014 Great job! Now break out the can of Krylon and finish the camo job!
NTXshooter Posted April 3, 2014 Author Report Posted April 3, 2014 Definitely planning on continuing with the FDE theme. Thinking I will do the the APEX and the compensator. Took it to the gunsmith today to check the headspace and it passed. Next stop is the range. Can't wait to try it out.
98Z5V Posted April 8, 2014 Report Posted April 8, 2014 Definitely planning on continuing with the FDE theme. FDE will take over the world. I've been preaching that for several years now, but these bastards don't wanna listen. I'm glad that you see the light. <thumbsup> <laughs>
Robocop1051 Posted April 8, 2014 Report Posted April 8, 2014 OD covered the earth for billions of years before the first FDE squirrel jumped out of an OD tree.
NTXshooter Posted April 9, 2014 Author Report Posted April 9, 2014 Robocop, that may be true for most of the world, but I hunt in West Texas and the only things there that are OD are cactus and cedar trees. Everything else is closer to FDE. Finally got to the range today. After getting the gas block adjusted, this thing shoots sweet. Can't wait to get a pig in the sights.
NTXshooter Posted April 20, 2014 Author Report Posted April 20, 2014 Ok. Bought the Aluma=Hyde II (Coyote color) from Brownells for the hand guard and compensator. Painted it this weekend. I think it looks great.
survivalshop Posted April 21, 2014 Report Posted April 21, 2014 I like that . Any special prep to the hand guard to paint it ?
NTXshooter Posted April 21, 2014 Author Report Posted April 21, 2014 Just made sure it was clean. Wiped it down with alcohol. A few trips to the range and lease and I will know how well it is going to wear.
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