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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

Great Deal On NEW Magpul MBUS PRO LR Adjustable Rear Sight

Posted on February 5th, 2015 by ar15news

Recently Magpul introduced a new version of the super popular MBUS PRO rear sight called the MBUS PRO LR which has a built in elevation adjustment wheel with preset detents at 50 meter increments all the way out to 600 meters. As always, buying a rear sight is always more expensive than buying a front sight…just because. Normal retail on this sight is $129.95 but thankfully our buddy Eric over at VF Gunrunners is the king of MBUS PRO deals and is running a special pre-order deal on this new sight. VF Gunrunners offers the MBUS PRO LR sight alone for $103.99 with FREE SHIPPING or you combine it with the MBUS PRO Front Sight for just $156.99 with FREE SHIPPING. I don’t know about you but I really appreciate companies that offer free shipping on stuff. It takes the guess work out of “Am I really getting a good deal?”. Check out the pics of the new MBUS PRO LR sight below and hit the links to get in on this great deal. 

MBUS PRO LR Rear Sight  –  $103.99 w/Free Shipping

MBUS PRO LR Rear Sight and Front Sight  –  $156.99 w/Free Shipping

MAG527-MBUS-Pro-LR-Sight-B copyMAG527-MBUS-Pro-LR-Sight-F copyMAG527-MBUS-Pro-LR-Sight-c copy

Sneak Peek!! – KNS Precision Front Sight Posts for MBUS Pro

Posted on January 26th, 2015 by ar15news

Here’s a sneak peek at the new KNS Precision Front Sight Posts for the super popular Magpul MBUS Pro sights. The moment Magpul introduced the MBUS Pro sights people were looking for companies to make front sight post replacements. As far as I know, KNS Precision is the first to off an upgrade FSP for the MBUS Pro sights and it looks like they’ve got some great options. Apparently they will have both square and ball posts in .034, .052 and .072 diameters. There really isn’t a ton of additional information available yet other than what they posted on the KNS Precision Facebook Page and Instagram.

You can also keep an eye on their website www.KNSPrecisionInc.com.

KNS Precision MBUS Pro Sight Posts

Magpul Introduces the New PMAG D60 (60 Round Drum)

Posted on January 13th, 2015 by ar15news

It really was only a matter of time before Magpul decided to venture into the drum mag business. We know they have the expertise to make a high quality affordable magazine and have recently added 40 rounds PMAGs to their lineup. Today they introduced the new PMAG D60 which is a lightweight, compact polymer 60 r0und drum mag. It features a special loading lever to make loading easier, a clear “full magazine indication window” on the back, can be inserted on a closed bolt and holds the bolt open after the last round. It also can be easily disassembled for cleaning. Magpul says it will begin shipping Spring/Summer 2015 with an MSRP of $129.95 but they will not be making “cut-away” or “transparent” models. www.Magpul.com

The PMAG D-60. Sixty rounds. Reliable, durable, lightweight, shorter than a 30 rd mag, and full of features that make it extremely easy to use. MSRP $129.95. Please not that transparent back and cut-away versions were for testing purposes only, and the solid drum with round indicator window is the variant that will be offered for sale. Shipping Spring/Summer 2015, but you can get a sneak peak of the drum in action at ATAC range day before SHOT show.

NEW!! Magpul M-LOK Rail Covers

Posted on January 7th, 2015 by ar15news

I’ve been hoping someone would come out with a decent set of Rail Covers for my Geissele SMR MK8 M-LOK rail just to add a bit of grippier surface to it and it looks like Magpul is the first to the make it happen. The new M-LOK Type 2 Rail Covers are a two piece design that snap together similar to the design of the popular XTM 1913 rail covers. They also feature the TSP texture that is found on some of Magpul’s newer grips such as the MOE K2 which I really like. Each package comes with 6 sections for just $12.95. I will definitely be picking up a couple packs of these as they seem to be just what the Dr. ordered.

Magpul M-LOK Rail Covers 1Magpul M-LOK Rail Covers 1

M-LOK Type 2 Rail Covers are low-profile, two-piece covers that install directly onto most M-LOK aluminum hand guards. These M-LOK Covers are non-orientation specific which allow the user to mount them in any direction desired without affecting function, feature beveled contours to minimize potential snagging, utilizes our TSP texture for additional grip, and protrudes only slightly more than 1/8″ from the mounting surface to maintain a low-profile. The center locking tab is pre-scored to allow the user to snap off sections and mix and match colors for a customized look.Includes six panels, each covering one M-LOK slot. Made in U.S.A.

Purchase here: http://store.magpul.com/product/MAG603/M-LOK

New!! Magpul MS1 Padded Sling w/IWC’s 2 to 1 Point Triglide

Posted on December 11th, 2014 by ar15news

Magpul recently introduced their new MS1 Padded Sling. The MS1 Padded Sling by itself is an adjustable 2-point sling with a wider padded section of webbing towards the middle that does not come with any attachment points other than the webbing. IWC has taken the Magpul MS1 Padded Sling to the next step by adding their patented 2-To-1 Point Triglide and two (2) Heavy Duty Push Button QD Swivels to the sling making it the complete package. With this setup the user can easily use the sling as a 2-point sling or attach the front QD to the 2-To-1 Point Triglide and use it as a Single Point Sling. 

IWC Magpul MS1 Sling with QDs and 2to1 Point Triglide 1 copy

IWC Magpul MS1 Sling with QDs and 2to1 Point Triglide 1 copy

IWC Magpul MS1 Sling with QDs and 2to1 Point Triglide 1 copy

By purchasing the new Magpul MS1 2-Point Sling, IWC 2-To-1 Point Triglide and 2 Heavy Duty Push Button QD’s from Impact Weapons Components as a package you can save $23.85 compared to buying all of the components individually. If you’ve been eyeing the new MS1 Sling but wanted a bit more or want a great Christmas present for someone, head on over to www.ImpactWeaponsComponents.com and grab this awesome combo deal. 

For this specific combo deal there are no additional discounts allowed but if you find anything else on IWC’s website such as their awesome QD End Plate (goes great with this sling), you can use the discount code “ar15news” at checkout to save 5% off the rest of your order. 

Black Rifle Black Friday Sale 2014 – VF Gunrunners

Posted on November 26th, 2014 by ar15news

VF Gunrunners is offering two awesome deals for Black Friday. Both of these deals center around the new MBUS PRO and MBUS PRO Offset sight sets. Both sets of sights are extremely discounted and you get FREE SHIPPING too! Check out the details on the standard and offset sights below. 

Magpul MBUS Pro Sight Set $128.99 FREE shipping
Purchase Here: http://vfgunrunners.com/rifle-parts/ar-15/magpul-mbus-pro-sight-set.html


Magpul MBUS Pro Sight Black Friday Deal VF Gunrunners**Pre-Order**

Magpul MBUS Pro Sight Set $144.29 FREE shipping 
Purchase Here: http://vfgunrunners.com/magpul-mbus-pro-offset-sight-set-pre-order.html

Magpul MBUS Pro Offset Sight Black Friday Deal VF Gunrunners

Magpul MBUS Polymer Sight Set $68.99
http://vfgunrunners.com/magpul-mbus-sight-set-free-shipping.html

Magpul MBUS Sight Black Friday Deal VF Gunrunners

NEW!! Magpul MBUS PRO Offset Sights

Posted on November 20th, 2014 by ar15news

Man, I am seriously going poor with all of these awesome new products that companies like Magpul are releasing lately. With the release of the new Offset version of the awesome MBUS PRO sights, I don’t see the bleeding stopping anytime soon. Offset sights work great with magnified optics. Switch from magnified (longer range) optics to non-magnified (close range) sights by simply rotating the gun about 45 degrees. The fact that these are collapsible sights make them very low profile when not in use as well. 

Magpul MBUS PRO Offset Sights Rear Magpul MBUS PRO Offset Sights Front

Magpul MBUS PRO Offset Sights

I’m really excited to give these new Magpul MBUS PRO Offset Sights a try. I did the same thing with the standard MBUS PRO sights and now I have like 5 sets. :) As far as I can tell these are in-stock and ready to go now at www.Magpul.com at just $189.90 for a front and rear set. I’ll race you over there to see who can get a set faster. 

Magpul MBUS PRO Offset Sight Rear
Magpul MNUS PRO Offset Sight Front

NEW!! Magpul MOE K2+ (Rubberized) Grip

Posted on November 15th, 2014 by ar15news

I have 3 or 4 rifles with the Magpul MOE K2 grip on them and really like them. Been a fan of the MOE+ for a while now too and have always thought it would be nice if they offered a MOE K2+ version which would add the rubberized finish to it. Well, now they do. Late yesterday they released the new MOE K2+ rubberized grip. If you’re looking for a new grip or just have $25 burning a hole in your pocket, head on over to www.Magpul.com and pick one up.  

Magpul MOE K2+ Grip 1

Magpul MOE K2+ Grip 2

KAK Industry 7.62×39 AR Pistol Build and Range Report

Posted on October 20th, 2014 by ar15news

I’ve been so busy lately that I’ve not had a ton of time to go to the range but last week I specifically made time to hit the range and function test my 7.62×39 AR Pistol I built. This thing had been sitting in my HSP INCOG Rifle Bag completely ready to go just begging for some action and it was my pleasure to oblige. Below you’ll see some pics of my 7.62×39 AR Pistol. I’ll first cover the components I used to build it and the range report will follow after that.

KAK Ind 762x39 AR Pistol Build 7

Basically all you need to retrofit or build any AR upper as a 7.62×39 is the Barrel, Bolt and Mags and KAK Industry has everything you need in one place. I already had an extra AR Pistol lower built so I just needed some of their awesome upper components. The lower is a Noveske N4 forged lower with an ALG Defense ACT trigger, Battle Arms Development Selector, Magpul MOE K2 grip, Law Tactical Gen3 Folding Stock Adapter, Phase 5 Weapon Systems Pistol Buffer Tube and a Sig Sauer SB-15 Arm Brace. I upgraded to a Wolf High Power Hammer Spring but probably could have done without it. 

KAK Ind 762x39 AR Pistol Build 7

KAK Ind 762x39 AR Pistol Build 7

For the upper I sourced the heart of the build at KAK Industry. They make all of their own components and have a great reputation. I used the KAK Industry 11″ 7.62×39 barrel, KAK Industry 7.62×39 complete BCG, KAK Industry Gas Block and Gas Tube. The upper receiver is an AERO Precision forged upper with a Northtech Defense Ti-FANG Titanium forward assist, Fortis Mfg Hammer charging handle, Centurion Arms 11″ CMR rail and a BattleComp BABC. Topped it all off with a Vortex Optics Viper PST 1-4 scope and an American Defense Mfg QD mount.

KAK Ind 762x39 AR Pistol Build 7

KAK Ind 762x39 AR Pistol Build 7

Of course the weather is changing up here in Michigan. It was cold and rainy that morning at the range but I couldn’t care less. I brought along some really nice Hornady 123gr 7.62×39 SST ammo to run through the brand new AR Pistol. The best thing you can do when function testing a new AR is to take it slow. I only had one ASC 7.62×39 mag so I loaded one round in the mag, pulled back on the charging handle, flipped the selector to “America” and pulled the trigger. As expected it went BOOM so I checked the chamber to make sure the rifle ejected the spent casing, which it did. After that first round goes as planned you get a bit of a smile on your face and start to have fun.

KAK Ind 762x39 AR Pistol Build 7

I loaded up another 5 rounds and proceeded to fire them down range sighting in the Vortex Optics Viper PST 1-4 scope.  First 3 rounds went through perfect but on the fourth I had a Failure To Feed. Keep in mind I only had 5 rounds in the mag to start meaning this was the second to last round in the mag. I stripped the mag, removed the round and inspected it noticing that once the mag was removed the round didn’t really seem to be stuck or anything. I loaded another 10 rounds and again, second to last round FTF. This was a recurring theme and it became very clear that the issue was with the mag and definitely not at all a problem with the Upper, BCG or Barrel. Other than the second to last round of each mag issue I had absolutely ZERO malfunctions with this build. It really was a pleasure to shoot. I’ve heard the ASC mags get better as you wear them in but I will also be looking into some other brands and will do a followup article specifically regarding 7.62×39 AR Mags.

KAK Ind 762x39 AR Pistol Build 7

So after blowing through almost all of my ammo getting to know the 7.62×39 AR Pistol, I saved the last 5 rounds to get a little grouping on paper. Now keep in mind, when I test fire my AR’s I always go to the shorter range. Its basically a 30-35 yard range that typically has less people on it. When I shoot for groups I usually head on over to the 100 yard range but being that this is just an AR Pistol, I had no bipod, etc I decided to stay on the shorter range and just get a group there. The image below shows you a 5 round group, just resting the handguard on a block. I’m positive I could tighten this group up but I was out of ammo. One of these days I’ll get it out on the 100 yard range and get some longer range data. I was very happy with this group though based on the distance I would expect to shoot this rifle at in a real world situation. 

KAK Ind 762x39 AR Pistol Build 7

Overall, I am very pleased with this build. Aside from the magazine issue, all of the parts functioned flawlessly. KAK Industry really is a one stop shop for tons of AR Parts including 5.56, 300BLK, 7.62×39, 458 SOCOM and .308 builds. This is not my first experience with KAK Industry and I’ve enjoyed every part I’ve purchased from them. For this specific build you can check out the KAK 7.62×39 AR Parts here. For all other builds just visit the KAKIndustry.com website and get to looking around at the awesome stuff they offer.  

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