Pretty sure I'm building an AR-10. Looking for some advice.

[titanse05]

Hello all,

For some odd reason I find myself wanting to put together my first AR-10. So I'm looking for some advice and or comments on my potential build.

What I'm thinking thus far:

- American Defense UIC-10A builders set including a 15" M-LOK Handguard (DPMS SR-25 PLATFORM)
- 16" barrel
- UBR Gen 2 stock
- Toolcraft Nitride BCG
- Raptor CH
- Talon safety
- Dead Air Armament key-mo brake
- suppressed with my Silencerco Omega

I think that covers the main items. So my question to you is.... What barrel should I use in my build? Should I be using a SLR adjustable gas block? What length gas system?

Initially I was leaning towards a Ballistic Advantage Hanson barrel that includes the pinned gas block.

Thoughts?

[fledge]

I wouldn’t use an adj gas block until you find its over-gassed. If it’s not, you’re wasting money.

I don’t see a downside to getting the BA Hanson.

The dead air brake is loud like all brakes, which means unpleasant to shoot unsuppressed. Why not thread directly with the Omega and save some more coin?

[titanse05]

I wouldn’t use an adj gas block until you find its over-gassed. If it’s not, you’re wasting money.

I don’t see a downside to getting the BA Hanson.

The dead air brake is loud like all brakes, which means unpleasant to shoot unsuppressed. Why not thread directly with the Omega and save some more coin?

The Omega I have is currently direct threaded to a 300 blk SBR and I want to be able to easily swap the can to whatever I'm shooting that day. The key-mo system appears to be a better mounting system to me and after selling off the ASR stuff it shouldn't be much of an upgrade cost.

Why do you think you should or shouldn’t use an adjustable gas block?
I’d say add an EMR-C from Forward Controls. It’s the mag catch button, but it’s taller than mil spec.
I really like BA barrels. I have their 18” Premium on my 308.
So what’s your plan for the 308?

I don't really have a plan per-se. I just don't have one and should right? Mostly this rifle will be on a 100-200 yard range but hope to find places to stretch that out a bit.

[RobertTheTexan]

I don't really have a plan per-se. I just don't have one and should right? Mostly this rifle will be on a 100-200 yard range but hope to find places to stretch that out a bit.

My question was just another way of asking “Why a 16 inch barrel?” For me I wanted to find a balance between good ballistics and good physical handling of the weapon so I chose 18” I also went rifle length because there was more data pointing to that config being more reliable.

Although the first time I shot it I thought, man I gotta build me an SBR in 7.62x51!


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[RobertTheTexan]

Why do you think you should or shouldn’t use an adjustable gas block?
I’d say add an EMR-C from Forward Controls. It’s the mag catch button, but it’s taller than mil spec.
I really like BA barrels. I have their 18” Premium on my 308.
So what’s your plan for the 308?


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[titanse05]

http://ballisticadvantage.com/16-inc...um-barrel.html

What say the hive about this barrel? This would be my third Hanson barrel.....just can't beat the quality and price after discounts and it includes the pinned gas block.

[RobertTheTexan]

Of those 16” barrels on their website, I’d go with that one. I have several of their barrels and not once have I been disappointed in accuracy and quality of finish.


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[BoilerUp]

Given that you want to shoot suppressed, plus the fact that 308 ARs tend to be a bit more finicky to get running well, I highly recommend just starting off with an SLR Sentry adjustable gas block. It will almost certainly save you some time and frustration. (and SLR is having a black Friday sale right now)

I'd also suggest an 18" barrel with rifle length gas. I think 18-20" barrels are the sweet spot for .308. For barrels, BA would be a good choice, especially given all the sales right now, but I also suggest you take a look at AR15 performance. Many happy customers reporting excellent accuracy. I see a lot of happy customers of BA, too, but I don't see a whole lot of bragging online about the accuracy.

What receiver / builder's set are you eyeing? The Aero Precision sets are cheap at Schulyer Arms right now, but their fat "enhanced" handguards aren't for everyone. And the thing is going to be heavy enough without the UBR, so I suggest you ponder how much weight you are willing to accept. Once you throw an optic on that you're almost certainly going to be over 9 pounds w/o ammo. I personally don't have much use for a 9+ pound "carbine".

[titanse05]

Given that you want to shoot suppressed, plus the fact that 308 ARs tend to be a bit more finicky to get running well, I highly recommend just starting off with an SLR Sentry adjustable gas block. It will almost certainly save you some time and frustration. (and SLR is having a black Friday sale right now)

I'd also suggest an 18" barrel with rifle length gas. I think 18-20" barrels are the sweet spot for .308. For barrels, BA would be a good choice, especially given all the sales right now, but I also suggest you take a look at AR15 performance. Many happy customers reporting excellent accuracy. I see a lot of happy customers of BA, too, but I don't see a whole lot of bragging online about the accuracy.

What receiver / builder's set are you eyeing? The Aero Precision sets are cheap at Schulyer Arms right now, but their fat "enhanced" handguards aren't for everyone. And the thing is going to be heavy enough without the UBR, so I suggest you ponder how much weight you are willing to accept. Once you throw an optic on that you're almost certainly going to be over 9 pounds w/o ammo. I personally don't have much use for a 9+ pound "carbine".

If I were to do the adjustable block the SLR is the only option IMHO. Going back and forth between on this part of the build.

I'm going with an American Defense UIC-10A Combo with a 15" handguard. I prefer a full length rail on my ARs and the 15" handguard puts me at a 16" barrel. At the distances I'll be shooting at typically I don't think I'll see a difference between the 16 and 18. Plus I like the continuous look with the handguard and suppressor.

[RobertTheTexan]

If I were to do the adjustable block the SLR is the only option IMHO. Going back and forth between on this part of the build.

I'm going with an American Defense UIC-10A Combo with a 15" handguard. I prefer a full length rail on my ARs and the 15" handguard puts me at a 16" barrel. At the distances I'll be shooting at typically I don't think I'll see a difference between the 16 and 18. Plus I like the continuous look with the handguard and suppressor.

Not to speak for Boiler but his comment and my earlier comment about barrel recommendations (length and gas system) wasn’t only about what will give you better accuracy at range, but even more so about what works. I did my due diligence before my build and my takeaway was that the 18” barrel with rifle gas was one of the keys to consistent reliability. “Out of box functionality” so to speak. - it really just works. You don’t have to manipulate with a gas block to get a rifle to work like it should with a standard. GB. Your research may have come up with a different conclusion, but mine made it clear that <18” with mid gas was more of a PITA than it was a reliable solution. I’ve not had a single FTF/FTE out of my DMR. I believe with 110% certainly that is because I used what many others before me had fleshed out. Either way I hope whatever you decide on works.

I have an SLR hand guard on mine, initially I had a 16” Hand guard, but I had to send that back because it looked like my rail was half a mile long. I got tired just looking at he end of it. But with the 15” in my opinion anyway, looks good. But the fact I haven’t had a single failure to fire in spite of slamming ALL kinds of ammo down range - trumps everything.


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[alamo5000]

I think 18-20" barrels are the sweet spot for .308.

Per a previous conversation with the Griffin guys here on the forum (at least for their cans) they said 18" is basically 'optimal' for efficiency of suppressors.

That's a +1 for the 18" from me in that regard.

Ballistically speaking though you can get a whole lot out of a .308 with various barrel lengths.

Up to 800 yards it won't matter what barrel length is used. If the general use is inside 800 yards the environmental factors (temperature, humidity, altitude, etc) will make a lot more difference than barrel length ever will. In other words you can knock em out all day long with 16" barrel at 800 yards all day long pretty much in any conditions.

Once you go past that mark though that extra 2 inches of barrel can make a difference.

[RobertTheTexan]

Given that you want to shoot suppressed, plus the fact that 308 ARs tend to be a bit more finicky to get running well, I highly recommend just starting off with an SLR Sentry adjustable gas block. It will almost certainly save you some time and frustration. (and SLR is having a black Friday sale right now)

I'd also suggest an 18" barrel with rifle length gas. I think 18-20" barrels are the sweet spot for .308. For barrels, BA would be a good choice, especially given all the sales right now, but I also suggest you take a look at AR15 performance. Many happy customers reporting excellent accuracy. I see a lot of happy customers of BA, too, but I don't see a whole lot of bragging online about the accuracy.

What receiver / builder's set are you eyeing? The Aero Precision sets are cheap at Schulyer Arms right now, but their fat "enhanced" handguards aren't for everyone. And the thing is going to be heavy enough without the UBR, so I suggest you ponder how much weight you are willing to accept. Once you throw an optic on that you're almost certainly going to be over 9 pounds w/o ammo. I personally don't have much use for a 9+ pound "carbine".

I don’t know about bragging but my BA barrels are all sub MOA, my .308 (18” Performance rifle gas) is very accurate. Consistent .40’s at 100, .71-.77 at 250. I can see your point, sorta but I wouldn’t only gauge a parts performance based on who’s bragging the loudest. There may be some connection to the type of user... I don’t know. I don’t brag because maybe to someone else those numbers are just average.
I wholeheartedly agree on the 18-20. That’s not just a sweet spot for accuracy but for function.


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[BoilerUp]

Check out the SLR handguards, too. You can get some long ones if you want a longer barrel http://slrrifleworks.com/index.php?r...product_id=893

SLR's mounting system is fantastic, IMO

[alamo5000]

SLR's mounting system is fantastic, IMO

+2 on that.

SLR is awesome. I love their no muss no fuss barrel nuts. No special tools, no timing, none of that, and they make superior products.

Given that I don't have the dough to try out more brands which I am sure to like too, but SLR is proven in my book.

[Joelski]

Don't think Radian is doing BCG'S in 7.62 yet...

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