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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

If you’re in the market for a great rifle with longer range capabilities while packing a bigger punch, Radical Firearms has just released their new RF 20″ 6.5 Grendel Complete Rifle at a really great price point. The RF 20″ 6.5 Grendel comes with a 20″ SS match grade barrel, low profile gas block, 15″ RF Hybrid Free Float Rail (made by Seekins Precision), Mil Spec forged upper and lower and the LUTH-AR MBA-1 modular precision rifle stock. Add all of those together and you’ve got a really great rifle at a fantastic price point, starting at just $830 with a few upgrade options to look at. Check out the pics and details below, then head on over to www.RadicalFirearms.com to snag one for yourself.

Radical Firearms 6.5 Grendel 20 inch rifle 3 copyRadical Firearms 6.5 Grendel 20 inch rifle 3 copyRadical Firearms 6.5 Grendel 20 inch rifle 3 copy

Rifle comes complete with:
–  20″ Stainless Steel Match Grade Barrel
–  Radical Low-Pro Gas Block
–  15″ Radical Firearms Billet Free Float Hybrid Rail
–  Custom Stainless Pepper Pot Break
–  M4 Forged Upper receiver
–  Mil Spec Bolt Carrier group
–  Standard Charging handle
–  Luth-AR Modular: MBA-1 Stock
–  Forged Lower
–  Mil Spec Lower parts kit
–  Mil Spec Grip

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 – LANTAC

Posted on January 23rd, 2015 by ar15news

LANTAC has some pretty awesome product coming out this year. They have new billet receivers, their new SPADA rail system, BMD – Blast Mitigation Device, Drop-In Trigger, BCG, etc. I have quite a few of their new products on my list to buy this year and can’t wait to try them out. Check out the video and pic below. 

LANTAC-USA.com
LANTAC Facebook Page
LANTAC Instagram

Video courtesy of Crossfire and Steve Coulston.

Photo by Triple Bravo

01-23-15 LANTAC TB copy

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

SHOT Show 2015 – Mega Arms Interview

Posted on January 20th, 2015 by ar15news

Here’s a great video of my buddy Steve Coulston interviewing Jason Curns, Firearms Manager of Mega Arms. Mega Arms has some really awesome stuff coming out this year including the new 700 Chassis, Free Float Quad Rail for all AR-15’s, M-LOK components, etc. Check out the video below and be sure to keep an eye on Mega Arms.

Video courtesy of CrossFire

SHOT Show 2015 Mega Arms Interview

Video Overview – New 2015 Geissele and ALG Defense Products

Posted on January 16th, 2015 by ar15news

Bill Geissele gives an in-depth look at all of the new 2015 product offerings from Geissele Automatics and ALG Defense!

NEW!! Geissele SMR MK4 M-LOK Rail

Posted on January 15th, 2015 by ar15news

One of my favorite rails I have is the Geissele SMR MK4 which features some KeyMod slots at the 3, 6 and 9 o’clock sections as well as short rail sections up front. They now are offering the SMR MK4 with M-LOK slots. The coolest part is that they also put M-LOK slots along the upper left and upper right 45 degree angles allowing for additional mounting positions that are tucked in closer to the top rail. 

As with all of the Geissele Super Modular Rails, the MK4 M-LOK will mount to Geissele’s proprietary barrel nut that makes for an extremely rigid transition from Upper to Rail and also makes it very easy to swap out different rails on one single upper. So far there is no exact time for when these will be available but I would assume they’ll be available soon.

Geissele SMR MK4 MLOK Rail 3

Geissele SMR MK4 MLOK Rail 3

Geissele SMR MK4 MLOK Rail 3

The Super Modular Rail MK4 M-LOK is Geissele’s ultra-lightweight M-LOK option. These rails feature integrated M1913 Picatinny rail sections at the muzzle end of the rail in the 3, 6 and 9 o’clock positions. Additional slotting aids in heat dissipation while dramatically reducing the rails overall weight and not sacrificing the original strong and rigid platform. The MK4 M-LOK rail features M-LOK slots at the 3, 6 and 9 o’clock positions as well as the upper 45° quadrants. This reduces weight of the rail system, while keeping the modularity and versatility to attach the myriad of Magpul M-LOK of accessories as necessary.

www.Geissele.com

556 Tactical Pre-SHOT Show Rail Sale

Posted on January 13th, 2015 by ar15news

If you’ve been looking for a great deal on a new quality rail system for your AR, this sale is for you. 556 Tactical is throwing a Pre-SHOT Show Rail Sale where you can get $50 OFF 556 SKR RAILS and $30 OFF 556 EVO RAILS. I have multiples of both of these rails and they are great. This sale runs now through 1/19/2015. Purchase now at www.556Tactical.com.

556 Tactical Show Show Rail Sale

NEW!! ALG EMR V2 M-LOK Rail

Posted on January 10th, 2015 by ar15news

The Ergonomic Modular Rail V2 supports direct attach accessories that utilize the Magpul M-Lok system. The EMR features M-Lok slots at 2, 4, 6, 8, and 10 o’clock positions so the user can customize their weapon platform to suit their needs. The EMR V2 M-LOK also features two integrated anti-rotational QD slots at the base of the rail at the 2 and 10 o’clock positions. 

ALG Defense EMR V2 M-LOK 1

The V2 differs from the V1 rail with the addition of a machined M1913 Picatinny rail section at the muzzle end of the rail at the 12 o’clock position. The machined M1913 section is perfect for attaching front sights, lasers, IR illuminators, lights and any other optic or sling related M1913 compatible accessory.

ALG Defense EMR V2 M-LOK 1ALG Defense EMR V2 M-LOK 1ALG Defense EMR V2 M-LOK 1

MSRP: 10” EMR V2 M-LOK: $145
12” EMR V2 M-LOK: $150
13” EMR V2 M-LOK: $155
15” EMR V2 M-LOK: $165

Available soon at www.ALGDefense.com

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