@elmuzzlebreak I don't think the Larue has an AGB. And for an 18 inch mid-length system, in my experience, an AGB is required.
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I must’ve missed the part about the ABG in Op’s Post. But yeah you are right larue doesn’t have an AGB like superlative. You could probably add one on but larue rifles get finicky when you add things.@elmuzzlebreak I don't think the Larue has an AGB. And for an 18 inch mid-length system, in my experience, an AGB is required.
You can save a good bit and get a Rainier Ultramatch MOD 2 20" 1:10 308 barrel for $410 and use coupon code padom10 for another 10% off and have an extremely accurate barrel for under $400.
The MEGA and Seekins receiver sets are billet vs forged and are thicker for more reinforcement to prevent receiver flex. They also have undersized barrel extension area for a super tight fitting barrel into the upper.
Aero are good for a budget build. They arent tight fitting with your barrel, and I've had 2 mis milled M5 lowers that were replaced by Aero. Great for budget builds but I wouldnt use them on a build list like yours. MEGA has been my go to.but with them hard to find Seekins builders sets are next in line.
All of the mechanical accuracy of an AR is contained in the upper reciever group.Explain why it doesn’t matter if your lower and upper aren’t tight. Legitimately curious.
All of the mechanical accuracy of an AR is contained in the upper reciever group.
It isnt the same as a bolt action gun with loose action screws. It is the same as a handgun with a loose slide to frame fit.
... If you're looking to connect at 8-900 with Federal 175's then is 20" the way to go? Is 18" too short? Would 22 be better? At what point, in your experience does the rifle - set up for daytime and unsuppressed - start to not balance well ..
Are these questions directed at moi or padhome ? If me, I can work on the answers, but they aren't one word answers
... f you're looking to connect at 8-900 with Federal 175's then is 20" the way to go? Is 18" too short? ...
In the realm of AR accuracy issues, loose upper to lower fit is a very very minor concern and the difference between billet and forged isn't consistent....that's the same thing lol. As someone who has experienced this first hand on a few different platforms, I'll agree that we are in disagreement.
... $4500 got me the rifle, ten extra mags, the cleaning kit w/bolt, another URX4 tube, a few rails and other keymod parts and a few sets of flip sights. Really a killer deal. Comes with a hard case, not a Pelican but not the usual cheap one that I know you all know what I'm talking about. Spiral bound manual, target, round count book ...
Hecque of a deal for sure !!!
I was looking at a used SR-25 with a 24 inch barrel for ~$5k but that won't fit into my budget ... but the 10 mags you got you helps on the budget !!!
How much does that sucquer weigh ?? I'm guessing 25 lbs ...
Pretty darn happy with my AR10 build:
Aero precision receiver set and hand guard
Rainier Ultramatch barrel 22” 6.5 creed
JP internals
Delivers consistent results out to 1098 yds so far...View attachment 7037855
If you're looking to connect at 8-900 with Federal 175's then is 20" the way to go? Is 18" too short? Would 22 be better? At what point, in your experience does the rifle - set up for daytime and unsuppressed - start to not balance well.
God bless America
I believe Mega is a sr25/ armalite pattern as opposed to the more popular DPMS.
There is also something like this
My .02 cents
Barrel is overkill. For the price of the bartlien Bartlen you could get a matched set JP precision Barrel, Lmos BCG, and silent capture spring.
As stated above Wilson combat are match grade for $300 or even a ballistic advantage are good. I run a $200 faxon out to 700 on 12" steel all day with the cheapest Russian steel ammo you can find
get a fail zero or decent BCG.
You are missing some other misc parts.
Buffer tube: strike industris or PWS.
Gas block and tube: JP precision
Muzzle device. VG6
Pistol grip: ergo or hogue rubberized.
I would reccomend upgrading your Safety select and mag release with something like a battle arms.
Also reccomend honing your upper prior to assembly it makes a difference.
Barrel is overkill? If you want to shoot 12" groups at 700yds with cheap shit steel ammo then shit save all your money and get a Bear Creek barrel. You want to shoot 1/2moa at 700yds with quality match ammo or handloads get a quality, known match barrel.
And hone your upper?? Ive never heard of "honing" an upper? Shit Ive built 100's of AR's, and 30 or more large frame gassers and Ive never "honed" an upper and somehow they are tack drivers....
For sub MOA, I would avoid Ballistic Advantage barrels. It's the Aero house brand and they look nice but if you look at the accuracy results, they don't look so great. Not all bad, not all good but why take a chance? It's not like they are cheap.My .02 cents
Barrel is overkill. For the price of the bartlien Bartlen you could get a matched set JP precision Barrel, Lmos BCG, and silent capture spring.
As stated above Wilson combat are match grade for $300 or even a ballistic advantage are good. I run a $200 faxon out to 700 on 12" steel all day with the cheapest Russian steel ammo you can find
get a fail zero or decent BCG.
You are missing some other misc parts.
Buffer tube: strike industris or PWS.
Gas block and tube: JP precision
Muzzle device. VG6
Pistol grip: ergo or hogue rubberized.
I would reccomend upgrading your Safety select and mag release with something like a battle arms.
Also reccomend honing your upper prior to assembly it makes a difference.
To each his own, if you have money to buy all the most expensive high end parts, by all means. Even if you can get the same results the for less.
Ive never had that luxury so my experience is making more from less.
Youve never heard of upper honing, lapping, truing? try it, you might like it.
Oh, some people aren't poor, they would just rather have 5 perfectly good LR308 pattern rifles with optics than two SR25s.
For sub MOA, I would avoid Ballistic Advantage barrels. It's the Aero house brand and they look nice but if you look at the accuracy results, they don't look so great. Not all bad, not all good but why take a chance? It's not like they are cheap.
Muzzle device is really a matter of preference. If your gun is in that 11+ lb range, you can get away without one if you would rather not be the guy blowing stuff off the benches at the firing line and testing the performance of all the ear protection.
My 3/8 MOA LR308 was not honed, lapped, thermo-fit or Loktite fit, just fairly snug and a properly torqued barrel nut. Some might need it, some don't.
Talked to GAP yesterday. They are flexible on the stock and the trigger. The barrel they want to put in is exactly the same barrel I want (bartlein #13 20 inch with slr agb). They are also flexible on the trigger.
From what I've been able to glean from all sources, priorities for me are:
#1 barrel
#2 trigger
#3 enablement of site picture (cheek piece adjustability, stock length adjustability (can also be mitigated by moving scope))
#4+ all else
My primary concern with self-build is getting good barrel to receiver fit as I've never done this. So, I'd like to do it at least once under supervision.
(I am getting the idea that the Kreiger barrels should be on my list, but I know less about them and their availbility, etc. whereas I know more about the bartlein to customer supply path)
I am not REQUIRING sub 0.5 inch performance from this system, though GAP "guarantees" it ... I want 0.75 inches, like I have now. that meets my requirement to hit 12 inch steel at 900yds. Which is 1.33 iphy
A significant downside of GAP is 5-6 month lead time, though I can live with that.
As to muzzle devices, I use direct thread suppressors and I already have them, so don't need another break I would just remove and toss in the parts box.
Yes, this is sort of a "precision ranch gun" Never thought of it that way ...
dots and groups at 100yds mostly in the day
wind practice 500-1050yds day and night
critter control 0-500yds mostly at night
want 0.75 inch groups at 100yds off tripod, already there with bolt guns and existing stoner rifles ...
As to BCG we did not discuss and their website doesn't mention, so, negatif, this is not on the radar as a critical upgrade. I've broken a bolt and mangled an ejector on other stoners ... and I fix 'em if they break. As long as I can get parts that work.
+1 on the nickel boron.For BCGs, I suggest "standard pressure" and use ammo with large rifle size primers.
All the BCG problems seem to come in when you shoot small rifle primers or shoot large rifle primers with a "high pressure" bolt (small firing pin).
I have one JP BCG that was $$$ and several Toolcraft BCGs that were quite a bit cheaper and seem every bit as nice. Nickel Boron is nice, very easy to clean and slick.
The JP stuff is nice but there are many alternatives with similar functionality so you can build an AR that runs like a JP without necessarily using too many JP parts.
My latest barrel was done by Craddock precision. If u send him the upper and bolt you are using you will get a perfect fit. I’m beyond impressed with what they did with my 260 bartlein+1 on the nickel boron.
Are there any other companies making match grade barrels and bolts as a matched set? Not that Mixed set cant be every bit as accurate, it can. And there are some great BCGs out there.
The way i see it is. Barrel, bolt, gas system, recoil spring is the heart of your rifle. If you could buy it all from one maker who engineered it to work seamlessly. Why not?
Its like if Bartlien made a barrel and bolt combo, why wouldnt you?
If I do a build, Craddock P. is in my plan to provide the barrel ...
My primary ammo is FGMM 7.62 175gr ... which might be a tad higher pressure than my secondary ammo which is FGMM .308 175gr ... my tertiery ammo M118LR is higher still ... but they are all pretty close in MV ...
22 inch barrel MV of FGMM .308 = 2646
22 inch barrel MV of FGMM 7.62 = 2652
22 inch barrel MV of M118LR = 2660
under recent conditions
I expect to shoot nothing but the FGMM 7.62 175gr once I shoot up existing supplies of FGMM .308 175 and M118LR.
==
So the benefit of a higher cost BCG is that I can remove the AGB ??? (trying to understand benefit of higher cost BCG)
He doesn’t need the upper but I recommend sending it (do not send lower, he is not FFL) because with the lack of AR 10 standard, some are tighter than others. The Zev this is going in was extremely tight as it was designed for a thermal fit. The aero may vary. But he will need the bolt. This will ensure your chamber to bolt fit is perfect. I used the JP enhanced bolt.I haven't called them yet, so I didn't know about sending them the upper. Other's I've talked to wanted you to send them the upper (or the receiver if bolt) so I'm not surprised.
Looks really nice !
Either get an adjustable gas block or variable mass BCG. Don’t do both. I recommend the adjustable gas block a quality BCG and the JP SCS. The JP adj gas block is awesome for two reasons. 1 it’s very low profile and 2 it’s a clamp style so if you use it on a gun with a pinned brake you can still take it off for cleaning and such.2 separate things.
Sorry for the confusion.
An adjustable gas block you can fine tune mostly for reducing the recoil. If you tune it to a certain pressure (suppressed) or a certain ammo. and then shoot it without a suppressor or a lower pressure ammo. Maybe some bulk surplus or something, it might not have enough pressure to cycle the BCG back far enough to pick up another round.
Most stock rifles are over gassed so they can cycle reliably with wide variety of ammo.
A quality BCG is just that. It interfaces with your barrel. Its a critical moving part. You can get a low mass BCG and different spring and buffer weight combinations that all work together with the AGB to fine tune the recoil. But you can end up with a finicky rifle.
Either get an adjustable gas block or variable mass BCG. Don’t do both. I recommend the adjustable gas block a quality BCG and the JP SCS. The JP adj gas block is awesome for two reasons. 1 it’s very low profile and 2 it’s a clamp style so if you use it on a gun with a pinned brake you can still take it off for cleaning and such.
Not only that the adjustment mechanism is captured so it won’t fly out on you if you adjust too much.I just installed a JP low pro AGB on a recent build for this very reason. While I have been a huge SA supporter after too many SLR seize ups I am really liking this new JP. Lowest profile agb on the market.
... I haven't shot any AR (AR15 or LR308) enough to have bolt trouble ...