AERO Precision Announces M4E1 American Flag Cerakote Limited Edition Builder Set Posted on 04 Mar 23:18 , 0 comments

Aero Precision American Flag AR 15 Builder Set Limited Run

If you’ve been wondering what AERO’s March 2017 Limited Edition Builder Set would look like, wonder no more. AERO’s March Builder Set is now available and they definitely hit a home run with this one. This month they are doing a Limited Run of M4E1 Upper Receiver, Gen2 Stripped Lower Receiver, 15″ Enhanced Gen2 Handguard (KeyMod or MLOK) and a Billet Trigger Guard all finished in a beautiful American Flag Grey to Silver Cerakote. Their timing couldn't be more perfect for you to build a beautiful custom American tribute rifle to show off on the upcoming July 4th holiday and every other day. These builder sets look fantastic with a set of black AR furniture but you're free to use your own imagination to build something uniquly yours. If you’re looking for a quick start to your next custom build, check these out!

Aero Precision American Flag AR 15

Ground Zero Precision & Stiller's Precision Pen Exclusive Distribution Agreement Posted on 19 Feb 21:21 , 0 comments

Stiller's Precision Predator XT AR15 Lower receiver

Ground Zero Precision is proud to announce their exclusive distribution agreement with Stiller's Precision to bring the sniper inspired Predator XT billet AR-15 Lower Receiver to market. 

Give your next precision AR-15 project a state of the art foundation with the Predator XT Billet AR lower by Stiller's Precision. Jerry Stiller, world renowned designer and manufacturer of the U.S. Navy's legendary MK13 300WM sniper rifle action, researched far and wide to determine what exactly the perfect precision AR lower receiver should be and the Predator XT is the result. He very quickly determined that the only way he could offer all of the features he wanted while completely eliminating torsional stress would be to start with a billet blank. After a painstaking and extensive material study it was determined that the best combination of stiffness, strength and toughness necessary for the foundation of a hyper-accurate AR rifle was offered by a relatively unknown high performance aircraft alloy that is used predominately in the construction of the F-16 and other U.S. military fighter jet structures. The alloy, 7050-T7651, is almost twice as strong as 6061-T6 and has better crack resistance than 7075-T6 while offering a higher level of corrosion resistance and lighter relative weight than both. As with everything else Jerry has produced this alloy was the absolute best material for the job, so that is what he used. 

As for the design, it all started with the standard forged Mil-Spec lower receiver drawing and quickly morphed into something completely different as features were added and deemed necessary. In order to add the torsional stiffness necessary in a precision rifle foundation, the magwell area was ribbed in a truss pattern along with an expanded width trigger guard. The magwell was designed and chamfered to allow for a wider flare for easy magazine insertion and sized to allow all currently marketed magazines to drop free without snagging or catching in the magwell. Rather then machine or broach the magwell, wire EDM technology was used to more exactly control the size and exact position for flawless feeding. A textured finger grip area was added to the front to help control the weapon when holding with the offhand on the magwell. To help keep a wide range of upper receivers tight, all of the pin locations and mating surfaces are under constant and close control during the machining process and a nylon tipped tension adjustment screw was added under the rear pin location to allow the shooter a wider range of upper receiver choices and the ability to keep the lower and upper fit tight with one simple adjustment. All of the edges and inner corners have been chamfered or rounded for ergonomics and additional strength. The stock boss (buffer tube area) on the back was also beefed up to add strength and a small setscrew was added for the rear pin spring to help keep stock installation or replacement a snap. After all that, a Mil-Spec type III 2 mil thick hard anodize is performed by one of the defense industries' top suppliers for excellent surface wear, additional corrosion resistance and ravishing good looks.

The Predator XT lower receiver is made available through an exclusive agreement between Stiller's Precision and Ground Zero Precision.

Features Summary:

  • Precision machined from 7050-T7651 aluminum super alloy for the absolute highest stiffness, strength and toughness
  • X-Rib magwell stiffeners and extended width machined in trigger guard add overall strength and stiffness.
  • Flared magwell that is wire EDM cut for exact size and alignment for easy drop free use of all currently marketed magazines.
  • Machined finger grip pad on front of the lower allows for easy control of weapon during use
  • Extra beefy stock boss adds strength, stiffness and greatly reduces the chance of breakage when used with even the most powerful cartridges.
  • A setscrew is added to help retain rear pin spring and ease the installation or replacement of stocks. 
  • Nylon tipped tension adjustment screw allows the shooter to adjust the lower to upper receiver fit.
  • Type III hard anodized to 2 mil deep for excellent wear and looks
  • Marked for multi-caliber use and specified as other to ATF so that it can be used for pistol or rifle

Stiller's Precision MK13 300WM Sniper Rifle:

Stiller's Precision MK13

About Stiller's Precision:

Stiller's Precision Firearms was founded in 1998 by Jerry Stiller, a defense engineer working for Raytheon. His goal was to supply shooters with a best quality product for a reasonable price. Curtis Helton, a Raytheon machinist soon joined the company and we became successful benchrest suppliers and mediocre shooters. In 2005 we added our hunting line of actions, the Predator series. Soon after the TAC series for the tactical market followed. We still follow our original goal and feel it has served us well. Currently we build actions for all different parts of the industry including the MK13 for the US Military. Many of the custom rifle builder's receivers you see are made right here by us.

Stiller's Precision Firearms is able to keep the quality up and costs down by a unique blend of processes used to manufacture our receivers. We have over 20 late model CNC machines dedicated to building receivers and their parts. We buy the best to build the best. Most of our machines are dedicated to one operation. By doing this, the quality and consistency goes up and labor cost goes down by never having to tear down setups. As soon as anything looks or sounds different it is quickly apparent to the machinist and the problem is solved. Our volume allows this to happen and work for you, our customers, we deliver the best quality and value possible.

We use the best materials, tooling and processes to ensure our actions are second to none in quality or value. All of the steel used in action bodies is 416R barrel quality stainless and the one piece bolts are made from VAR aircraft certified 4140 alloy steel. Small parts are built out of materials best suited for their purpose and includes many tool steels and exotic high strength aluminum alloys.

Review of our 10.5" Stainless Upper Receiver Kit by IWantThatReviews Posted on 06 Feb 11:53 , 0 comments

Purchase this kit here!

Sneak Peek – Next Level Arms “NLX15” AR-15 Billet Receiver Set Posted on 28 Dec 20:16 , 0 comments

Next Level Arms NLX15 Billet Receiver Set

Next Level Arms, a company we are proud to say we've been partnered with since their beginning, is getting ready to release a really nice looking light weight AR-15 billet receiver set. The NLX15 billet receiver set will weigh just 15 ounces! That’s just under a pound for both upper and lower combined. Read More...


Get on the pre-order list here!



Three Awesome AR Uppers - American Rifleman Posted on 28 Oct 19:05 , 0 comments

Three Awesome AR Uppers - American Rifleman

We are honored to have one of our 300 Blackout upper receivers featured in the NRA American Rifleman's 'Three Awesome AR Uppers' review!

The AR-15's split personality allows a single lower assembly that has a standard size lower receiver to be connected to different uppers chambered in a variety of calibers. Here’s a closer look at how to make the most of a single lower and three quality uppers that span the small, medium and big-bore cartridge options for the AR platform...

Read More: Three Awesome AR Uppers

View our complete AR-15 Upper Receiver Collection

JP Releases Variable Mass Operating System (VMOS) Posted on 18 Oct 02:28 , 0 comments

JP Releases Variable Mass Operating System (VMOS)


We've been running JP Captured Spring buffer systems in our suppressed rifles for years now; proudly showing off our substantially lessened cyclical operation noise while running magazine after magazine of 220 grain "Bacon Bulldozers" silently down range; perfectly timed with the perfect velocity to send even the biggest boar immediately through the gates of Paradise and into the awaiting arms, er, whatever is left, of those new arrivals seeking their much promised virgins.

There have been many times after a long day of shooting that we've sat around the fire talking about our JP inserts and without knocking them at all wondered how they could be made even better. Well, It seems that last question was better left up to the engineers at JP because their newely released Variable Mass Operating System (VMOS) is going to open a whole brand spankin new can of variability worms for us all to play with.

Read more about JP's Newly Released Variable Mass Operating System (VMOS)!

Building AR-15 Pistols At Home - American Rifleman Magazine featuring Ground Zero Precision Posted on 12 Oct 12:46 , 0 comments

Building AR-15 Pistols At Home by American Rifleman Magazine


When B. Gil Horman, field editor at American Rifleman Magazine contacted us at the beginning of the year asking if we wouldn't mind being included in an informational article he was writing on building AR-15 pistols at home we thought it was a great idea and that our already well established product line of assembly ready build-it-yourself kits would be a great fit for his project.

We are very happy to have been included in the project. Gil did a great job with his build and wrote a well researched article you're sure to fine informative and entertaining. You can read the full article here:

Building AR-15 Pistols At Home

O. F. Mossberg & Sons, Inc. v. Timney Triggers, LLC. - What You Need To Know Posted on 24 May 02:21 , 0 comments

Mossberg Drop-In Trigger Lawsuit - Why Timney Matters

 LAST UPDATED 5/24/2016

Unless you've been under a rock the last few days you've likely read or heard [Breaking] news about Mossberg's announced filing of a lawsuit against drop-in AR15 trigger manufacturers Patriot Ordnance Factory, BlackDawn, DOA Arms, Tactical Fire Control, Battle Tested Equipment, T Vehr Manufacturing, Rise Armament, Elftmann Gun Products and possibly others to be named at a later date. 

Most reports of the lawsuit posted to date claim that Mossberg is simply exercising its right ownership and control over U.S. Patent No. 7,293,385 B2, filed January 9, 2007 and awarded November 13, 2007 to Michael L. McCormick of CMC Triggers while others report that CMC Triggers is somehow manipulating Mossberg into being their own legal attack puppet in an effort to stifle competition. None of the reports thus far contain much information at all other than the announcement and some speculation (typically stated as fact) over the details of the cases and what effect they may have on the companies named as Plaintiffs. As is typical with just about every "Breaking News" report ever posted, no matter the subject, the rush to be the first and to get the most clicks has fueled a wide variety of reactions across the firearms community with no one seeming to have a clear picture of what is actually going on.

What is clear is that Mossberg, having legally obtained the Patent from CMC Triggers Corp., owns the rights to the intellectual property represented in the patent. 

What has not been made clear, at least in the reports we've reviewed so far is what that ownership means in application as pertains to the innovative actions, designs, product development, processes and methods of the named lawsuit Plaintiffs. Some of you may see it all as clear as a bell and be wondering where I'm missing it. I'm not missing it. I see it as clear as a bell also. Traditionally we would all likely agree that when A person or company in America owns something they have right to it period and I'm sure that's how Mossberg would like for all of us to see it... but... and unfortunately for Mossberg, the fact is since February 7th 2012 Mossberg has been entangled in a brutal legal battle in Connecticut District Court Case Number 3:2012-cv-00198 with Timney Triggers, LLC in which Mossberg accuses Timney of Patent Infringement. The case against Timney was supposed to be the precedent setter. It was supposed to be the battle ax Mossberg could wield to slay all who dared infringement while swilling Supernaut IPA from New England Brewing Co.

Mossberg tried to play it right. Go after the biggest fish first and then use the experience (and precedence) to destroy all who may cross them.

That may have been the plan at first but it was quickly obvious that Timney was raring for a fight and funded well enough duke it out in court for the last 4 years and continuing to this day. A fight Mossberg may have expected. Losing the fight after 4 years is something they couldn't have expected or one would hope they would have been smart enough not to go down that road in the first place. 

But go down that road they did and losing the fight with Timney is currently what they're doing and such a loss could be devastating to their world domination plans.

The Mossberg v. Timney lawsuit, as it progresses through the courts, has not been ignored by those with some skin in the game and Steve Watts of Elftmann Tactical (Elftmann Gun Products) laid it out to me in this way 


Good Afternoon Mr. Bennett,

We've known for a long time that this might be coming, we went to Mossberg as soon as we found out they claim a patent. If they had been reasonable in the royalty amount we would have just started paying it even though the patent is very questionable. The amount they want is ridiculous, so we decided to wait and see what happens with the Timney case. Read the latest ruling in the Mossberg v. Timney case in full here. (PTO is the Patent and Trade Office)

Quote from page 2 "Lastly, on May 21 the PTO issued a first Office Action on the merits rejecting every claim of the patent-in-suit as unpatentable. The PTO determined that based on teachings in the prior art one of ordinary skill in the art at the time of the invention would have found the ‘385 patent claims obvious. The PTO rejected every claim over multiple combinations of prior art references cited by Timney in its reexamination Request."

And the Conclusion on page 9 "In sum, the PTO determined that the correct priority date of the ‘385 patent is March 22, 2004 (not 2002), all ten Grounds raised by Timney presented substantial new questions about the patentability of the ‘385 patent claims, and every claim of the patent is unpatentable based on multiple prior art combinations. Thus, every claim of the patent in suit is now under reexamination at the PTO. This case should remain stayed pending final resolution of the reexamination proceedings"

Based on that we made the decision to wait and see what happens, I guess we'll be seeing them in court now. It's interesting to see how overwhelming the support has been for the companies being sued.

Steve Watts
Elftmann Tactical

Sooo... The question begs if the District Court of Connecticut is, as it appears throughout the latest ruling in the Timney case, questioning the patentability of all 385 patent claims granted in the original McCormick claim, What exactly, if anything, did Mossberg gain in their purchase of the Patent from CMC? If a gavel bangs in determination that the original Patent is and was at the time of the grant unpatentable all Mossberg gained was worthless paper and a whole lot of legal bills.

why would Mossberg be pushing these recent lawsuits in the face of what can only reasonably be summed up as a pending total loss in the Timney case? 

The answer is simple. Until the gavel bangs Mossberg still holds the ax and if they can use it to weed out some of their competition via a mere threat of litigation (and the incurred expenses thereof). 

Navigating Patents to avoid infringement is not a hard thing to do. Sign the contract, pay the royalties and get your machines turning. 

Buying worthless, un-enforcable, un-patentable intellectual property through the aquisition of a Patent the courts are determining questionable at best, completely worthless at worst... Not quite so easy. Reporting the error and subsequent failure in court after an over 4 year battle to a group of your investors can be devastating.

I hope you all take the time to read, study and understand the linked pdf's of all of the pertinant documents we've collected to date. They should help you understand that the quickly announced lawsuits everyone is talking about right now are very likely nothing more than a barking chained dog.

***This blog post will be updated as more (factual) information pertaining to the TImney suit and the multi-party suit announced over the weekend are found and / or become available to us.***

In the meantime we're selling the Hell out of some badass drop-in triggers and we plan to keep that going well into the long run.


Y'all be good to each other,

Philip B.

Ground Zero Precision





INTRODUCING OUR NEWEST CALIBER LINE - 7.62x39 AR15 BUILD KITS! Posted on 10 Nov 11:34 , 0 comments

7.62x39 AR15 Kit Announcement

It's been lamented in forums and blogs all over the internet. Building your own 7.62X39 AR15 can be a real headache when sourcing parts using what has until now been the 'traditional' method of 'wherever you can find them' but it's a snap when you have all of the right hand selected and tested parts. It's even easier when someone has already done the legwork to source all of the components, made sure they are of the highest quality and fit and then put them all into a nice little package for you and it's a complete no-brainer when they do all of that and then offer it to you at a price you cannot beat if you tried putting it all together yourself AND THEN offering to ship it all to you FOR FREE!

Well that's exactly what we have done and you're going to like it! 

It took a full year of testing hundreds of components, in hundreds of configurations, with hundreds of "back to the drawing-board" moments but all of the hard work was worth it. Building a reliable 7.62x39 caliber rifle using the AR15 platform has been a challenge for even the most experienced AR builder for years so our goals starting out were simple:

  • Source and provide high quality, well functioning, highly tested components for a 7.62x39 kit that is easily assembled by even the newest AR builder.
  • Provide the build kits at a reasonable, affordable price point.

That's it. Sounds simple enough but our "No-Go" parts table tells a different story. We tested every product we could find with varying levels of frustration. We knew it could be done and we were determined to meet the simple goals we'd set out for ourselves. Today, we're proud to announce the fruits of our efforts. Get yours today!

You can view the full line of 7.62 x 39 AR-15 kits by following the links below:

AR-15 7.62X39 KITS (Rifle)

AR-15 7.62X39 KITS (Pistol) - COMING SOON!!!



Elftmann Tactical Push Button Ambidextrous Speed Safety Product Announcement

Ground Zero Precision is proud to be the first announce the latest AR innovation from Elftmann Tactical; the Push Button Ambidextrous Speed Safety!

Some History: Elftmann Tactical has been an innovator in the firearms accessories market for quite a while now. Their first product to market was their AR-15 Dual Trigger (D-TR), a first-of-its-kind accessory for the AR-15 (or any firearm, for that matter). When Mr. Elftmann added needle bearings and a drop-in housing it was a natural progression to develop conventional single triggers with needle bearings and the ELF drop-in trigger was born.

Many unique features set Elftmann firearm accessories apart from all others including ultra-precise machining, needle bearings, adjust-ability, drop safety, full 1/4” width dis-connector, ease of installation and modular design. Elftmann Tactical has quickly become respected as a leader in innovative solutions for the competition shooting, firearm enthusiast, military, and law enforcement markets.

Take your speed of engagement to a new level!

This push button ambidextrous speed safety is the latest innovation from Elftmann Tactical. Quickly take your AR from safety to ready to fire and back to safety with the simple push of a button. With no rotation necessary, no shifting of the shooters hand needed, this is the fastest safety selector to engage and dis-engage on the market. In stock and available today for only $39.95 only at Ground Zero Precision.

  • Push Button Safety Design
  • Ambidextrous Operation
  • Extremely Fast On-Off
  • Precision Machined From Gun Quality Tool Steel
  • Durable Black Oxide Finish
  • Compatible With All Mil-Spec Receivers
  • Includes Detent
  • Designed and Manufactured in the United States
  • Lifetime Guarantee

Click here to read more about Elftmann Tactical.

Click here to read Frequently Asked Questions about Elftman Tactical Triggers and Accessories.

Click here to read Elftmann Tactical Customer Testimonials

See a sneak peak video of the Elftmann Tactical Push Button Ambidextrous AR Speed Safety by here:

Product Photos:

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

ELFTMANN Tactical Push Button Ambidextrous Speed Safety

Elftmann Tactical Push Button Ambidextrous Speed Safety