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First Look – SI Defense .308 Ambi Rifle Build

Posted on February 17th, 2015 by ar15news

Over the past few months we’ve had the opportunity to work with the guys from SI-Defense in helping spread the word about their new products including their new .308 billet receiver set that features “mirrored ambi controls”. Remember that term as you’ll see what we mean soon. Now that the .308 Ambi receiver sets are hot off the machines, SI-Defense asked if we would want to build our own rifle using these receivers…and of course we’re not gonna turn that down. :) So this is the start to our multipart article showing the rifle we built, what parts we used and then we’ll do additional articles once we’ve actually had some time to shoot it for a while.

The first thing that arrived were the SI-Defense .308 Ambi billet receivers. The mirrored ambi controls on the receivers are pretty mind blowing. When you push on the Bolt Catch, Bolt Release or Mag Release on one side the same button on the other side moves as well. It really is pretty amazing that the ambi controls are mirrored and not just an added lever that is completely different than the control on the right side. The dust cover is pretty cool too in that it is easy to remove/install even with the handguard installed because it snaps into place.

SI-Defense 308 Ambi Rifle 1

A few months ago Rainier Arms introduced their new .308 UltraMatch BCG. Once I knew this build was going down I promptly went on the Rainier Arms website and purchased one. The finish on this thing is a really nice deep Black Nitride that is super smooth. The angled cuts toward the front and fluting at the rear of the carrier look pretty sweet.

SI-Defense 308 Ambi Rifle 1

If you’re gonna build a gun you definitely need a barrel, right?! Right. I’ve posted about AERO Precision barrels many many times before whenever they have a new model to introduce or a special deal etc. but have never personally used one myself. So for this build I contacted my buddy Chad over at AERO Precision to see if I could get my hands on one of their 16″ Mid Length .308 barrels. They are made of 416 Stainless Steel and I’m really excited to see how well they perform. You might be thinking “A 16 inch .308 build? Most guys do 18 inches or more.” and you’re right but I just built an 18″ like everyone else and wanted do something a bit different. Because I know big bore rifles can be a bit ornery I installed a SLR Rifleworks Sentry Adjustable Low Profile Gas Block along with the Rainier Arms Nitride Mid Length gas tube.

SI-Defense 308 Ambi Rifle 1

Along with the SLR Rifleworks Sentry Adjustable Gas Block, I also used the SLR Rifleworks SOLO 15″ KeyMod handguard, Hand Stop and their Synergy BCF muzzle device. It truly makes for one killer looking setup and can’t wait to see how well it performs.

SI-Defense 308 Ambi Rifle 10

SI-Defense 308 Ambi Rifle 1

Along with making some pretty amazing ambi receivers, SI-Defense also makes a mean looking ambi charging handle called the MACH10 which stands for Modular Ambi Charging Handle for AR10. This specific one has a neat feature where it latches on the inside of the receiver but they will also offer an outside latching MACH10 and a MACH15 charging handle as well.

SI-Defense 308 Ambi Rifle 1

As with all of my builds this one includes a Battle Arms Development Ambi Safety. I don’t own a single AR that does not have one and no I don’t get them for free. Its one of those products that I have honestly grown to love and buy them for every build.  

SI-Defense 308 Ambi Rifle 1

Along with upgrading the Safety I also upgraded the Trigger. I usually use either a Geissele or CMC Trigger and decided to try the Geissele S3G trigger in this build. The S3G is not really designed for a rifle with higher recoil as it has a very light trigger pull and could bump-fire easily so I used the heavier spring that comes with it. This is kind of a trial run and will be interesting to see how it performs in a .308.

SI-Defense 308 Ambi Rifle 1 SI-Defense 308 Ambi Rifle 1

Oooohhhh. Look at that sexy beast!! I also added a Trijicon VCOG, Magpul MBUS PRO sights, UBR stock and a MOE+ grip to finish off the build. I think it turned out to be an one of the best looking rifles I’ve built. 

SI-Defense 308 Ambi Rifle 1

These pics are hot off the press as I just finished this build over the weekend. This week will be its maiden voyage to see how well she runs and get the gas system all dialed in. Will update you with an additional article detailing its performance at the range and hopefully some 100 yard groups. If we don’t get accuracy data on the .308 AERO Precision barrel for that article it will be in an additional one for sure. Below is a list of links for the parts we used in this build.

AERO Precision
Battle Arms Development
Geissele
Magpul
Rainier Arms
SI-Defense
SLR Rifleworks
Trijicon

NEW!! Weapon Outfitters 13.7″ Barrel and BE Meyers 249F Combo

Posted on January 29th, 2015 by ar15news

A while back my buddy Roy over at Weapon Outfitters built me a 13.7″ upper with a pinned and welded BE Meyers 249F Flash Hider that has become one of my personal favorite uppers. The BE Meyers 249F flash hiders is amazing and the 16.1 overall length feels just right. You can see a picture of it below. Since then Roy has partnered with Micro MOA to offer a “Weapon Outfitters” branded barrel that is supposed to be pretty awesome. If you’re looking for something a bit different than the usual 18″, 16″ and 14.5″ uppers, this is the start to another great option.

WEapon Outfitters 13.7 barrel BE Meyers 249F 2

Weapon Outfitters has partnered with Micro MOA to deliver new 13.7″ Barrels to market.  When paired with a B.E. Meyers 249F Flash hider (or other long muzzle device like a KX5) you can achieve a 16.1″ overall length (OAL) to meet Federal guidelines. Save a little bit of weight while also toting the smallest possible carbine before you get into NFA territory.

WEapon Outfitters 13.7 barrel BE Meyers 249FWEapon Outfitters 13.7 barrel BE Meyers 249F

With this bundle, you’ll select the gas block you want to pair with your barrel and which version of the 249F you’d like.  Our gunsmith will handle the rest, pinning your muzzle device and staking your gas block.  Gunsmithing options can be deselected if you’ve got the means.  It is your responsiblity to understand the local, state, and federal laws if you choose this route to make sure you’re all hunky-dorry.

Specs on the barrel:

  • Features propietary rifling known as Single Edge Polygonal (SEP)
    • Essentially a combination of standard and polygonal rifling
    • SEP creates less bullet deformation due to its minimal engraving, allowing the bullet to move more symmetrically along the barrel
    • SEP reduces forward escaping gases and minimizing loss of gas pressure,
  • Finished in BlackNitride™
    • Treatment process increases barrel life and provides superior wear-resistance, surface strength, corrosion resistance, lubricity.  But most importantly: BlackNitride™ enhances cosmetic appeal :)
  • Barrel extensions are re-tourqed and then pinned after BlackNitride™ process
  • 4150V Grade Chromium-Molybdenum-Vanadium (CrMoV) steel
  • 1/2×28″ thread pitch
  • 5.56mm NATO chamber
  • 1/7″ Twist Rate
  • Barrels are turned on centers and not chopped down from longer lengths like some other barrel makers do

Check out this combo now at www.WeaponOutfitters.com.

AERO Precision 16″ .223 Wylde Uppers AND 18″ KeyMod Rail

Posted on January 27th, 2015 by ar15news

AERO Precision continues to add new products to their already long list of available products and they keep getting better and better. I remember when they only made stripped uppers and lowers and their COP system and didn’t sell direct. Anymore they are pretty much a one stop shop for building just about any kind of AR configuration you can think of with their complete line of barrels, receiver sets, rails, etc. for 5.56, 300BLK and .308. Recently they introduced two brand new products that will expand the possibilities even further.

First up was their new .223 Wylde chambered 16″ uppers. For those who don’t know, .223 Wylde is basically a hybrid between .223 and 5.56 NATO. Technically .223 chambered rifles are known for being a bit more accurate than a 5.56 NATO chambered rifle. With .223 Wylde barrels  you can shoot both .223 and 5.56 NATO rounds but they are designed to shoot the 5.56 NATO round more accurately than a 5.56 chambered barrel. They are offering these 16″ uppers based on their awesome forged M4E1 upper platform which features the integrated rail mounting surface and a “billet” look. You can choose between a 12″ or 15″ KeyMod rail or a 12″ M-LOK rail. These uppers are priced starting at $455 at AEROPrecisionUSA.com.

AERO Preicison KeyMod 12 inch 223 Wylde UpperAERO Preicison KeyMod 15 inch 223 Wylde UpperAERO Preicison MLOK 12 inch 223 Wylde Upper

On the last day of SHOT Show 2015, AERO Precision unveiled their new 18″ KeyMod rail which is something a lot of people look for when building a longer barreled rifle such as a 20″ upper, etc. These are specifically designed to mount to the AERO Precision enhanced uppers so don’t expect to order one and mount it to just any old upper. However, if you are planning on building a long barreled upper this is a good reason to build it using some AERO components. These are not available yet but should be soon.

AERO Precision 18 inch KeyMod Rail 620

SHOT Show 2015 – More New Products from Mega Arms

Posted on January 23rd, 2015 by ar15news

Mega Arms already introduced quite a few new products at SHOT Show this year but there were a few additional pieces that were just introduced or we didn’t really cover as close as we’d like to. For instance, Mega Arms just introduced a new pair of 5.56 SBR barrels (10.5″ and 14.5″) as well as a two new 300BLK barrels (10.5″ and 16″). 

Mega SBR and 300BLK Barrels 620

In case you missed it, here are our new SBR barrels, available in 10.5 and 14.5 in 556 NATO. 300 BLACKOUT is available for the first time in 10.5 and 16 barrel. MSRP on the 10.5s is $222.

They’ve also added an M-LOK version of the popular MKM MATEN upper. Mega Arms will be adding M-LOK across all platforms in addition to their current KeyMod offerings.

Mega Arms MLOK Options 620 

Mega Arms MATEN with MLOK 2 copy

Mega Arms MATEN with MLOK 2 copy

Mega Arms is excited to announce our new line of M-Lok AR-15 and MATEN/AR-10 hand guards and upper receivers. Firstly we have the new M-Lok versions of the MKM. Expect them to be in the same sizes, same platforms and at a similar price point as the KeyMod versions. Next up you will notice the new Wedge Lock free float Mil Spec AR-15 M-Lok hand guard. This all new product is made from 7075 and comes with a titanium barrel nut. Expect a variety of lengths, a MATEN/AR-10 version and a KeyMod variation in 2015. Pricing TBA. For those of you who have noticed a missing item in this group fear not, an M-Lok version of our venerable Megalithic Tactical System, or MTS, is also coming in 2015. An M-Lok version of the new Remington 700 chassis system is also planned. Expect to see the first of our new product at dealers by the end of the first quarter, 2015.

Lastly is the new Mega Arms Wedge Lock Handguard. Made from 7-series Aluminum with a Titanium barrel nut. Looks like it will mate up very nicely with a Mega Arms upper but will also work with any Mil-Spec upper as well. Gonna have to give one of these a try for sure.

Mega Arms Wedgelock Rail System 620 3Mega Arms Wedgelock Rail System 620 3Mega Arms Wedgelock Rail System 620 3

This is the new Mega Arms WEDGE LOCK handguard!
–  Cutting edge new design Ultra strong and lightweight. Simple one screw fastening system.
–  Made from 7075 extruded aluminum
–  Titanium barrel nut
–  Black Nitrided wedge system
–  Compatible with any Mil-Spec upper.
–  Includes handguard and comes with wedge system, titanium barrel nut, assembly tools, one M-LOK or KeyMod rail.

Definitely keep an eye on Mega Arms this year. Lots of awesome new products and super high quality as always. 

MegaArms.com
Mega Arms Facebook

NEW!! Faxon Firearms Heavy 18″ .308 AR-10 Barrels

Posted on January 16th, 2015 by ar15news

If you’re looking for a new .308 AR barrel you might want to check this out. Faxon Firearms just introduced two brand new .308 AR-10 barrels to their already stellar lineup and they look pretty awesome especially when you factor in the price.

The first is the 18″ .308 medium profile Battle Rifle Barrel. It is a 4150 ordnance grade steel barrel with a 1:10 Twist and mid length gas that has been given a Salt Bath Nitrided QPQ treatment for long life and heavy use. Purchase here for just $249

Faxon Firearms 18 inch 308 4150 Barrel

The other barrel is the 18″ .308 416R Stainless Steel Fluted barrel. These feature full length fluting (in front of and behind the gas block seat) and have also received the Salt Bath Nitrided QPQ treatment. Purchase here for just $289

Faxon Firearms 18 inch 308 416R SS Barrel

Now Available – Battle Arms Development LIGHTRIGID Barrels

Posted on January 12th, 2015 by ar15news

If you haven’t noticed, Battle Arms Development has been on a roll lately. They still make hands down the best Ambi Safety Selector on the market and have shown they are not afraid to step outside the box and offer some truly unique and high quality components in a time when a lot of manufacturers are trying to go the opposite direction offering lower quality parts. You can see this in their amazing looking billet receiver set we recently showed you guys and now you can get your hands on their new Ultramatch LIGHTRIGID 416R SS Fluted .223 Wylde barrels. Now, these are not cheap by any means but being that the barrel is essentially the heart of the rifle, its not necessarily a part you always want to scrimp on either.

Battle Arms LIGHTRIGID 416R SS Barrel

The new Battle Arms Development Ultramatch LIGHTRIGID barrels are available in both 14.5″ and 16″ lengths, are chambered in .223 Wylde with 1:8 Twist, precision 6-groove button rifling. They also have a .625″ dia gas block, a proprietary barrel contour, fluted, double heat treat stress relieved and cryogenically treated. If you are looking for an extremely high quality barrel this is definitely one to take a serious look at. Available now at www.BattleArmsDevelopment.com.

Christmas Sale – Centurion Arms

Posted on December 23rd, 2014 by ar15news

Our friends at Centurion Arms are throwing a surprise Christmas Sale and its an awesome one. They are offering special deals such as if you buy one of their 16″ Hammer Forged Barrels you’ll get a pinned Low Profile Gas Block for free as well. Another deal you’re definitely going to want to check out is the new CM4 Complete Upper which features their 16″ barrel and 9″ C4 rail. If you upgrade to the 12″ CMR or 12″ C4 rail they will throw in a FREE Auto Bolt Carrier Group. Check out the full details of the sale below and get in on it now through December 27, 2014. www.CenturionArms.com

Centurion Arms CM4 UpperCenturion Arms Christmas Sale 1Centurion Arms Christmas Sale 2Centurion Arms Christmas Sale 3

New!! FLAME Fluted 5.56 16″ 416R SS Melonite Barrel from Faxon

Posted on December 12th, 2014 by ar15news

Our friends over at Faxon Firearms already have an extensive line of high quality and affordable AR-15 barrels. Yesterday the introduced a new barrel to the lineup is sure to get some of you really excited. Its their new “FLAME” Fluted barrel which features a variable depth fluting which looks like flames that have been carved into the barrel. These barrels are 16″ Mid Length 416R Stainless Steel barrels that have a Melonite finish. 

Faxon Firearms Flame Fluted SS Barrel 2

Faxon Firearms Flame Fluted SS Barrel 2

The new Faxon Firearms FLAME Fluted 5.56 16″ 416R SS Melonite Barrel is available now for just $239 which is a crazy good deal. You can also add a Low Profile Gas Block for just $26 more. Last I heard there was a very limited quantity in-stock. Head on over to www.FaxonFirearms.com to snag one before they’re all gone. 

Black Rifle Black Friday Sale 2014 – KAK Industry

Posted on November 25th, 2014 by ar15news

As always KAK Industry is having a great Black Rifle Black Friday Sale this year. They have 5.56, 762×39 and .308 BCG’s on sale. Tons of AR Pistol parts on sale including Sig SB15 Arm Brace, Super Sig Sb15 Kits, Barrels, Buffer Tubes, Flash Hiders, Flash Cans and even more. KAK Industry is one of those companies that takes pride in just making awesome quality components that all of us can afford. Take advantage of this offer to save even more with their Black Rifle Black Friday Sale. No discount codes to remember. Everything that is on sale is included at http://www.kakindustry.com/sale-page.

kak industry black friday sale 1akak industry black friday sale 1a

Centurion Arms MK12 Barrels Back In-Stock

Posted on November 23rd, 2014 by ar15news

Whether you are like many AR owners and want to build an MK12 Rifle clone or just want to have an amazing barrel for your next build, you’ll be hard pressed to find a better option than a real MK12 barrel from Centurion Arms. These don’t just look like an MK12 barrel, they are REAL MK12 barrels. The same barrels as what are used by United States Special Operations Forces right now.

Centurion Arms MK12 Barrel 2Centurion Arms MK12 Barrel

Take advantage of this opportunity to snag a legit MK12 barrel before they’re all gone. Available only at www.CenturionArms.com

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