Category Archives: Juggernaut Tactical

If you’ve followed AR15NEWS for any decent length of time you’ve probably noticed we build lots of ARs. Some times, as an AR builder, it’s easy to get in a rut and kind of build the same thing over and over again which gets boring. All it takes is a bit of imagination and planning and your next build can be the best one you’ve ever put together. This is the very case with my most recent build. 

Believe it or not I had SBR’d this Rainier Arms forged lower well over a year ago but had no idea what I wanted to do with it. Then it came to me and I couldn’t stop thinking about it. From there it was just a matter of time before I had the parts in hand and ready to build.

Lets start out with a few closer shots. From this angle you can see the Rainier Arms ambi safety, Juggernaut Tactical ambi charging handle and Scalarworks OPS (On Point Sights) fixed rear sight.

Rainier Arms SBR Build 1 - Scalarworks OPS Fixed Sights Juggernaut Tactical Ambi Charging Handle - Rainier Arms Ambi Safety

As I mentioned above, this build got started as a Rainier Arms Forged A-DAC lower that I bought and Form 1’d just before the ATF41P effective date. I added a Rainier Arms forged upper and ambi safety, CMC Triggers Flat 3.5lb Trigger and LPK, Superlative Arms Piston Kit, Juggernaut Tactical ambi charging handle, Geissele MK4 rail and Scalarworks OPS Fixed Sights and Low Drag Mount for the Aimpoint T1 and a SureFeed Magazines 20 Round mag.

Rainier Arms SBR Build 2 - CMC Triggers Flat Trigger Geissele SMR MK4 rail Scalarworks OPS Fixed Sights Aimpoint Micro T1 Rainier Arms A-DAC

Of course as a Rainier Arms SBR build I chose to use their 10.5″ .223 Wylde barrel. Covered it with a Geissele MK4 rail, Arisaka Defense 300/IR Series Scout Light and Inline Scout Mount, SureFire SR07 switch, Scalarworks OPS Fixed Front Sight, Magpul vertical grip and Griffin Armament Taper Mount Supresspr Mount. The Superlative Arms Piston Kit gas block is under there somewhere. 😜

Rainier Arms SBR Build - Geissele SMR MK4 - Arisaka Inline Scout Light Mount 300 Series Scalarworks OPS Front Fixed Sight magpul vertical grip Surefire SR07

Here’s another angle of the business end on the new Rainier Arms SBR build. From this angle you can now see how accessible the Superlative Arms Piston Kit gas block is under the rail. This isn’t like many piston kits were you have one or two settings. Its more like a Piston Kit that has a built in fully adjustable gas block so you can really tune it in.

Rainier Arms SBR Build - Superlative Arms - Rainier Arms - Geissele - Scalarworks - Magpul = Arisaka Rainier Arms

This next shot gives you a better idea of how tidy things are on this build. It’s got everything I need and nothing I don’t. The Scalarworks OPS fixed sights and mount for the Aimpoint T1 are absolutely amazing. 

Rainier Arms SBR Build - rainier arms = cmc triggers = scalarworks = aimpoint t1 - juggernaut tactical - magpul - geissele

And here it is. Hope you guys enjoyed a pretty detailed look at my new Rainier Arms SBR build. In the end, this SBR turned out even better than I had pictured it but the initial imagination and passion to create another gun is what got it all started. Don’t be in too much of a hurry to just slap together the first complete rifle you can. Take your time with your next build, map it out, think about what would make you smile every time you see it and then build that. 

Rainier Arms SBR Build - rainier arms - geissele - cmc triggers - magpul - scalarworks - griffin armament - surefire = superlative arms piston kit - aimpoint juggernaut tactical

Here’s the full run down of parts for this build. If you want to copy it, be my guest. Would make for a great AR Pistol build too.  

Already had a chance to get the gas dialed in on the piston kit and man this thing is smooth. Will be getting some range time this week with this gun getting it sighted in. Will let you guys know how it runs soon.

Juggernaut Tactical just introduced their new Ultimate Jig. There are tons of jigs out there for machining 80% lower receivers. For the most part all of them are specifically for either the AR-15 or AR-1o lowers and not both. The new Ultimate Jig sets itself apart by accommodating both AR-15 AND AR-1o lower receivers from not just Juggernaut Tactical but also most lowers available on the market. It also has Press Fit Stainless Steel Drill Bushings, an alignment tool to keep your lower in the perfect spot and a depth gauge for the drill bits. 

Juggernaut Tactical Ultimate 80 percent lower Machining Jig 1

After considering everybody’s feedback regarding jigs, we were able to develop our patent pending Ultimate Jig. With this jig, you are now able to build both AR-10 and AR-15 80% lowers. Our alignment tool that ensures the pocket is always centered in combination with our oversized top plates allows for very smooth and consistent finishing. Pair that with our press fit stainless steel drill bushings and included depth gauge, you will have yourself the perfect tool to finish any top-tier AR rifle. The only thing necessary to get your project going is a drill press or a hand drill and router; everything else provided in your Ultimate Jig Kit.

Juggernaut Tactical Ultimate 80 percent lower Machining Jig 1

SPECS
– 17-4 Stainless Steel Drill Bushings
– Patented alignment tool with light
– Depth gage for quickly setting tool length
– CNC-machined from solid aerospace billet aluminum
– Laser-etched with Right/Left markings and drill hole sizes for convenience
– Individually replaceable plates
– Type III hard coat anodized
– Optional high quality tooling package includes all bits required to finish your AR-15 or AR-10 lower.  These are the same bits we use in our commercial CNC machines at the Juggernaut Tactical factory
– If instructions are properly followed, the jig kit can be used to finish up to 25 lowers, or more
– Made in the USA
– PATENT PENDING

Juggernaut Tactical Ultimate 80 percent bit set

Tooling package comes with:
– 1 ea. 0.375″ Cobalt Drill
– 1 ea. 0.3125″ Cobalt Drill
– 1 ea. 0.156″ Cobalt Drill
– 1 ea. 5/16″ Carbide Endmill

Overall this seems to be a very well thought out machining jig. The fact that it works for both AR-15 and AR-10 80% lowers is pretty awesome. Being that it works with both AR-15 and AR-10 lowers I was expecting to see a huge price tag on it but was very happy to see it is priced right in line or less than many of the comparable machining jigs on the market that only work with one or the other. If you’re an 80% DIY’er you definitely need to at least give the new Juggernaut Tactical Ultimate Jig a look.

The Ultimate Jig can be purchased directly from Juggernaut Tactical at www.JTactical.com.