UrbanHunter97 Posted November 1, 2017 Report Share Posted November 1, 2017 (edited) Hey all, I'm starting my very first .308AR build. In the past I've built two AR15s in .223 and one 9mm PCC. I have most of the basic knowledge down but I'm probably going to need some help. The goal of the build is to have a rifle that I can take out in the field hunting and to the range and shoot 500+ yards accurately. As of now I have an Aero Precision M5 Upper and will be purchasing the lower as soon as I turn 21 (only a few more months) in the meantime I'll be building out the upper completely and probably snagging myself a trigger. Planned Parts: Aero Precisions Upper Aero Precision Lower Aero Precision 15" keymod handguard BARREL, I'm thinking 18" don't know what brand though. Rifle Length. Rise Armament Compensator or Lantac Dragon Rise Armament RA-434 High Performance Trigger (maybe RA-140) Rise Armament .308 BCG or Aero Precision .308 BCG LuthAR MBA1 rifle stock LuthAR chubby grip OPTIC, I'm thinking I might go with a lower end Vortex JP low pro adjustable gas block All of that is tentative and I'm open to suggestions. I'm in the dark with what barrel to go with and what optic so any suggestions are appreciated. Keep in mind I'm working with a college student's budget... Edited November 1, 2017 by UrbanHunter97 Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted November 1, 2017 Author Report Share Posted November 1, 2017 Also, are Compensators necessary for what I'm wanting? Quote Link to comment Share on other sites More sharing options...
AMERIKINSHIP Posted November 1, 2017 Report Share Posted November 1, 2017 (edited) I'm new to building on the .308 platform so I'm no old hand at this. But in your situation I might just wait for a good sale (black friday maybe) and pick up a complete Aero upper. Ballistic Advantage makes Aero's barrels for them and they can be had at a relatively inexpensive cost. I hated that stock on my Armalite. Just not a fan at all. If I had the cheekpiece raised up where I wanted it I couldn't pull the charging handle all the way back.......wtf? From what you've said so far I'm not sure why you'd need a adjustable gas block. Not that its a bad idea. Also SLR seems to be the adjustable that is recommended the most. Compensators are definitely not a requirement though they can be nice. I think if anything you'd want a nice muzzle brake for hunting purposes. But they have so many muzzle device options nowadays that offer a little bit of everything.......supposedly. Could all be marketing. I've bought into them so you'll not get any guff from me. Ultimately it sounds like your budget is the biggest factor. I'd come up with a list of options you will accept for each part and then order them based off which you can get the best deal on. Edited November 1, 2017 by AMERIKINSHIP Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted November 1, 2017 Report Share Posted November 1, 2017 If budget is a concern: Aero Precisions Upper - GTG Aero Precision Lower - GTG Aero Precision 15" keymod handguard - GTG BARREL, I'm thinking 18" don't know what brand though. Rifle Length. - Go Criterion at Futon Armory. Super tight budget: Ballistic Advantage or Faxon Rise Armament Compensator or Lantac Dragon - Those are "ok" if you want a comp. VG6 is a bit better. For a brake, go Muzzle Brakes and More ""Beast"- 3 or 4 ports Rise Armament RA-434 High Performance Trigger (maybe RA-140) - Meh. I have the RA-140. Wait for the Giessele holiday sales Rise Armament .308 BCG or Aero Precision .308 BCG - go Aero LuthAR MBA1 rifle stock - It's light, but I found it very uncomfortable compared to Magpul LuthAR chubby grip - whatever you like OPTIC, I'm thinking I might go with a lower end Vortex - Save up. Don't wast money here. JP low pro adjustable gas block - Budget: Radical arms. Saving up: SLR or Superlative Arms Good luck!! Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted November 3, 2017 Author Report Share Posted November 3, 2017 On 11/1/2017 at 2:32 PM, D.R.D. said: BARREL, I'm thinking 18" don't know what brand though. Rifle Length. - Go Criterion at Futon Armory. Super tight budget: Ballistic Advantage or Faxon OPTIC, I'm thinking I might go with a lower end Vortex - Save up. Don't wast money here. JP low pro adjustable gas block - Budget: Radical arms. Saving up: SLR or Superlative Arms After doing some research I think I'm gonna go with the Criterion. As for the optic, I've started looking at the Nikon M308, everything I've seen about it has all been pretty positive. What is the benefit of SLR/Superlative over the JP Also, Thank you for your input. I am pretty in the dark especially with shooting over 150 yards On 11/1/2017 at 12:11 PM, AMERIKINSHIP said: Compensators are definitely not a requirement though they can be nice. I think if anything you'd want a nice muzzle brake for hunting purposes. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted November 3, 2017 Report Share Posted November 3, 2017 SLR is a solid time tested block, positive adjustment, no coil type spring to fail, and great customer service. Superlative is a dual function block. One end of the adjustment is a restrictive type and the other way bleeds off gas to reduce pressure. I found the bleed off inadequate for the gas volume of 308. Do a search here for a thread with more details. Never used a jp so can't really say, I think it uses a coil spring and ball detent if I remember correctly. Quote Link to comment Share on other sites More sharing options...
mineralman55 Posted November 3, 2017 Report Share Posted November 3, 2017 Welcome aboard. The Syrac Gen 2 gasblock is a very good design. I have several, and they adjust easily and handle the .308 round easily. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted November 3, 2017 Report Share Posted November 3, 2017 To help with your optics choice: http://opticsthoughts.com/?page_id=476 Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted November 5, 2017 Author Report Share Posted November 5, 2017 First part in, I went ahead and went with the assembled upper because it was on sale. Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted January 8, 2018 Author Report Share Posted January 8, 2018 (edited) So I've been acquiring parts as the budget allows BCM Charging Handle No-Mar upper vice block No-Mar mag vice block Buffer Spring Buffer Gas Tube LPK I have also been looking around at other builds for inspiration and ideas. I think the next purchase will be the barrel. I am gonna go with a 18.5" FA by Criterion (This will be ordered when then next pay check arrives). That brings me to my next question. FA offers this barrel with a plain muzzle or a threaded muzzle. Are there any advantages of a plain muzzle or is it all personal preference? Edited January 8, 2018 by UrbanHunter97 Quote Link to comment Share on other sites More sharing options...
98Z5V Posted January 8, 2018 Report Share Posted January 8, 2018 Do threaded, even if you don't want a muzzle device - you can simply put a thread protector on it. Even on the threaded barrels, they machine a target crown, so there's nothing to lose by doing threaded - and nothing gained over unthreaded and target crown. If you don't do a threaded barrel, it'll suck down the road when you want to hang something off the end of a plain barrel. No need for the limitation, IMHO. What kind of buffer and spring, receiver extension? Just checking now, in case problems arise later. Quote Link to comment Share on other sites More sharing options...
Magwa Posted January 9, 2018 Report Share Posted January 9, 2018 yep go threaded so then you can put a AAC brakeout on the end that will allow you to access your credit card since your wallet is empty so you can buy a AAC SDN 7.62-6 surppressor....... just trying to be helpful....... welcome to the addiction Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted January 13, 2018 Author Report Share Posted January 13, 2018 On 1/7/2018 at 11:25 PM, 98Z5V said: What kind of buffer and spring, receiver extension? Just checking now, in case problems arise later. I currently have the Aero Precision .308 Carbine spring and buffer. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted January 13, 2018 Report Share Posted January 13, 2018 (edited) 4 minutes ago, UrbanHunter97 said: I currently have the Aero Precision .308 Carbine spring and buffer. With the AP carbine receiver extension, for their .308? They've been noted several times as having a longer internal depth than "is standard" for that recoil system. Mine measured out a 7.100" internal depth, and several others have reported the same thing. Internal depth for that recoil system should be 7.000" and nothing more. A hundred thou doesn't sound like much - but it makes a difference in weapon operation... EDIT - once I discovered that, I threw that receiver extension in the trash. Seriously. Edited January 13, 2018 by 98Z5V Quote Link to comment Share on other sites More sharing options...
UrbanHunter97 Posted January 16, 2018 Author Report Share Posted January 16, 2018 On 1/12/2018 at 10:57 PM, 98Z5V said: With the AP carbine receiver extension, for their .308? They've been noted several times as having a longer internal depth than "is standard" for that recoil system. Mine measured out a 7.100" internal depth, and several others have reported the same thing. Internal depth for that recoil system should be 7.000" and nothing more. A hundred thou doesn't sound like much - but it makes a difference in weapon operation... EDIT - once I discovered that, I threw that receiver extension in the trash. Seriously. I've heard that too. Haven't bought one yet because of that. I have the Ergo F93 stock on my .223 that I'm thinking about just switching over and getting a Magpul UBR for my .223 Quote Link to comment Share on other sites More sharing options...
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