Category Archives: Lower Receivers

Rainier Arms has one of the largest selection of items on sale for Father’s Day including complete firearms, uppers, lowers, barrels, BCGs, parts and more. You can view all of the sale items now at www.RainierArms.com.

Rainier Arms Father's Day Sale

The AERO Precision monthly builder sets are one of the few things I look forward to being released every month. They’ve really kicked it up a notch lately with some amazing Cerakote finishes by the many of the best cerakote applicators in the business. This month they again are offering Builder Sets in both M4E1 (AR-15) and M5E1 (AR-10) configurations and have partnered up with Blown Deadline for a custom Burnt Bronze Woodland Camo finish that looks sick. Both builder sets include upper and lower receivers and a matching handguard in your choice of MLOK or KeyMod. The M4E1 set also comes with a matching trigger guard as well. 

Aero Precision june-m4e1-builder-set-bronze-woodland-em15-1Aero Precision june-m5-builder-set-bronze-woodland-em15-1

AERO Precision June Builder Set Burnt Bronze Woodland Camo

There are also Limited Edition Burnt Bronze Woodland Furniture sets available that include Magpul MOE grips and either CTR, STR or PRS Gen 3 stocks. This is a unique opportunity to get a complete rifle build done with Blown Deadline Cerakote finish without having to send your parts in and without having to wait for them to come back. You can shop all builder set components at www.AEROPrecisionUSA.com

While you’re there shopping for parts…you might want to get in on their monthly rifle giveaway too. 

AERO Precision Monthly Rifle Giveaway June

The AERO Precision Memorial Day Sale is live!
SAVE 15% sitewide + receive FREE SHIPPING on all orders.

Shop the sale – https://aeroprecisionusa.com/store-home/

AERO Precision Memorial Day Sale

“As we approach Memorial Day, it’s good to remember what this time is truly about. This weekend we make a concerted effort to reflect on the lives of our service men and women who have passed while serving our country. We celebrate their legacy, and recognize the freedoms that their sacrifices have afforded all citizens of the United States of America. Enjoy savings site wide while joining us in honoring their service and sacrifice.”

Memorial Day Savings Starts NOW!!! USE COUPON CODE “REMEMBER” DURING CHECKOUT TO SAVE 10% ON ALL CMT AR15/10 PRODUCTS THROUGH MONDAY 5-29-17!!

www.CMTTAC.com

Cross Machine Tool MOD1 and 2sCross Machine Tool Z Brake 6Cross Machine Tool CRC556 1

 

**PRESS RELEASE**

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.

GZP Stillers Precision Lower 1

GZP Stillers Precision Lower 1`

GZP Stillers Precision Lower 1

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

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.

I was literally just mentioning the other day how “an AR with an American Flag finish gets me every time”. Apparently AERO Precision was listening because their new Builder Set for the month of March is just that. The March Builder Set comes with a Forged Lower, Trigger Guard, M4E1 Forged Upper and Gen2 Enhanced Handguard (MLOK or KeyMod). All of the parts have a dark gray base cerakote finish and the receiver set has a silver American Flag as well that looks awesome. As always, this is a limited edition set and once it’s gone it won’t be coming back. Get your hands on this unique builder set at www.AEROPrecisionUSA.com

AERO Precision m4e1-march-builder-set-american Flag 3

This package deal includes the finished pieces you need to assemble your own American Flag Cerakote M4E1 Rifle, including an M4E1 Enhanced Upper Receiver, AR15 Gen 2 Lower Receiver, Gen 2 Enhanced Handguard of choice and Billet Trigger Guard all finished in American Flag Cerakote. Stand out at the range with a unique and eye catching build. This is a one time offer for this finish – once they are gone, they are gone!

AERO Precision m4e1-march-builder-set-american Flag 1AERO Precision m4e1-march-builder-set-american Flag 1AERO Precision m4e1-march-builder-set-american Flag 2AERO Precision m4e1-march-builder-set-american Flag 4AERO Precision m4e1-march-builder-set-american Flag 5

Includes:
– M4E1 Enhanced Upper Receiver finished in American Flag Cerakote. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.
– AR15 Gen 2 Stripped Lower Receiver finished in American Flag Cerakote
– 15″ Enhanced Gen 2 KeyMod or M-LOK Handguard finished in American Flag Cerakote
– Billet Trigger Guard in American Flag Cerakote

https://aeroprecisionusa.com/m4e1-american-flag-cerakote-builder-set.html

Custom Cerakote Finish done by Hillbilly 223 Urban Finishes.

If you’ve been wondering what AERO’s February Builder Set would look like, wonder no more. AERO’s February Builder Set is now available and they definitely didn’t disappoint. 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 Cobalt Cerakot. I’ve always been a fan of this color for a rifle and it would look fantastic with a set of black AR furniture. If you’re looking for a quick start to your next build, check these out at www.AEROPrecision.com.

AERO Precision February m4e1-em15-builder-set-cobalt-1AERO Precision February m4e1-em15-builder-set-cobalt-3AERO Precision February m4e1-em15-builder-set-cobalt-2

This package deal includes the finished pieces you need to assemble your own Cobalt Cerakote M4E1 Rifle, including an M4E1 Enhanced Upper Receiver, AR15 Gen 2 Lower Receiver, Gen 2 Enhanced Handguard of choice and Billet Trigger Guard all finished in Cobalt Cerakote. Stand out at the range with a unique and eye catching build. This is a one time offer for this finish – once they are gone, they are gone!

Includes:
– M4E1 Enhanced Upper Receiver finished in Cobalt Cerakote. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.
– AR15 Gen 2 Stripped Lower Receiver finished in Cobalt Cerakote
– 15″ Enhanced Gen 2 KeyMod or M-LOK Handguard finished in Cobalt Cerakote
– Billet Trigger Guard in Cobalt Cerakote

Next Level Arms, a company I am proud to say is local to me here in Michigan, 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. 

As you can see in the images below there is quite a bit of material removed in places that will not effect the integrity of the receiver and without any skeletonized areas aside from the shell deflector. Another thing to note from the following photo….the forward assist has been moved a bit further forward to give a little more clearance for lefties using ambi charging handles such as the NLX Ambi Charging Handle.

Next Level Arms NLX15 billet receiver set 1

Next Level Arms NLX15 billet receiver set 1

From what I’ve been told, the new NLX FIFTEEN billet receiver sets will be available early January 2017. I now that sounds like “Next Year” but its really only a couple weeks away. I have not heard anything on price yet but I’ll be sure to update this post as soon as I have that information. Until then, check out all that Next Level Arms offers at www.NextLevelArms.com

Each month AERO Precision introduces a new “Builder Set” which usually consists of an Upper, Lower and Handguard that have a unique custom finish on them. AERO Precision just released their December Builder Set which has the AERO Gen2 stripped forged lower, M4E1 Enhanced Upper Receiver, 15″ Handguard and Trigger Guard that have the Battleworn Copper/Black finish. If you are looking to start a new build you need to jump on this as the MLOK sets are already sold out and I’m sure the KeyMod will be soon. 

Purchase now at www.AEROPrecisionUSA.com

AERO m4e1-dec-builder-set-copper-bk KeyMod 1AERO m4e1-dec-builder-set-copper-bk KeyMod 1

The Battle Arms Development BLACK FRIDAY SALE STARTS TODAY through Sunday, November 27th at 11:59pm PT. There are three different tiers to this sale. Basically, spend $100 or more and get a free BAD-ATG grip. If you spend over $200 you can choose to upgrade the freebie to a BAD-EPS-Ti (Titanium Takedown Pin Set) and if you spend over $300 you can upgrade to a free BAD-ASS ambi safety selector. These are not stackable, meaning you can’t get all 3. The more you spend the nicer the single free product is. Details and specific discount codes to use are listed below. Get in on this deal at www.BattleArmsDevelopment.com.

ar15-2016-black-friday-sale-battle-arms-development

>$100 or more purchase in the Cart first, add any color BAD-ATG to cart and then enter code FREE-GRIP in the discount codes’ field – click “APPLY” before proceeding to checkout.

>$200 or more purchase in the Cart first, add BAD-EPS-Ti to cart and then enter code FREE-EPSTI in the discount codes’ field – click “APPLY” before proceeding to checkout.

>$300 or more purchase in the Cart first, add BAD-ASS to cart and then enter code FREE-BAD-ASS in the discount codes’ field – click “APPLY” before proceeding to checkout.

**One promo Code per purchase – Not Stackable!!** One promotional item per qualified purchase. While supplies last. **CODES will be valid only until November 27th, 2016 at 11:59pm PT – NO EXCEPTIONS** Happy Shopping!

http://www.battlearmsdevelopment.com

Usually I would not say I “NEED” another receiver set but thanks to LANTAC leaking pics of their new LA-SF15 Forged Upper and Lower set I can confirm…I do actually need another receiver set! 🙂 Knowing LANTAC as well as I do, the LA-SF15 set is sure to be about as high quality as a forged receiver set gets. No word yet on actual specifics or features but you know I’ll be pestering them for the details this week for sure. Until then, take a look at the pics of the new LA-SF15 Forged Upper and Lower set below.

www.LANTAC-USA.com

lantac-la-sf15-forged-recevier-set-1

lantac-la-sf15-forged-recevier-set-1

lantac-la-sf15-forged-recevier-set-1

If you’ve been looking for something absolutely awesome and unique to start your next build, you have to check this out! AERO Precision has a limited edition run of M4E1 builder sets (includes the enhanced upper receiver, lower, trigger guard and rail) with a Nickel Boron Battleworn finish. We’ve all seen the Battleworn Cerakote finished but its a safe bet that nobody you know has Battleworn NiB. This thing looks absolutely awesome and should make for a very durable finish too. Keep in mind this Battleworn NiB finish is not cheap to do but nothing special is. These sets are available in both KeyMod and MLOK now at www.AEROPrecisionUSA.com.

aero-precision-october-builder-set-battleworn-nib-1aero-precision-october-builder-set-battleworn-nib-1aero-precision-october-builder-set-battleworn-nib-mlokaero-precision-october-builder-set-battleworn-nib-keymod

Our October Builder Set features an AR15 M4E1 set with a Nickel Boron plated Battleworn (NIB Battleworn™) finish by Legal Manufacturing, LLC.

This package deal includes the finished pieces you need to assemble your own Nickel Boron plated Battleworn M4E1 Rifle, including an M4E1 Upper Receiver, AR15 Gen 2 Lower Receiver, Enhanced Handguard of choice and Billet Trigger Guard. Stand out at the range with a unique and eye catching build. This is a one time offer for this finish – once they are gone, they are gone!

Includes:
– M4E1 Enhanced Upper Receiver finished in NIB Battleworn™. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.
– AR15 Gen 2 Stripped Lower Receiver finished in NIB Battleworn™
– 12″ or 15″ KeyMod or M-LOK Handguard finished in NIB Battleworn™
– Billet Trigger Guard finished in NIB Battleworn™

AERO Precision just announced their September Builder Set. This month they are doing an M4E1 set in Magpul Stealth Grey. The Builder Set includes an AERO Precision forged lower, trigger guard, M4E1 enhanced upper and handguard (12″ or 15″, MLOK or KeyMod), all finished in a Magpul Stealth Grey Cerakote. If you’re looking for a great start to your next build, jump on this awesome kit. 

www.AEROPrecisionUSA.com

aero-precision-september-builder-set-magpul-stealth-grey

This package deal includes the finished pieces you need to assemble your own Magpul™ Stealth Grey M4E1 Rifle, including an M4E1 Upper Receiver, AR15 Gen 2 Lower Receiver, Enhanced Handguard of choice and Billet Trigger Guard. Stand out at the range with a unique and eye catching build. This is a one time offer for this finish – once they are gone, they are gone!

Includes:
– M4E1 Enhanced Upper Receiver finished in Magpul™ Stealth Grey. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.
– AR15 Gen 2 Stripped Lower Receiver finished in Magpul™ Stealth Grey
– 12″ or 15″ KeyMod or M-LOK Handguard finished in Magpul™ Stealth Grey
– Billet Trigger Guard finished in Magpul™ Stealth Grey

http://aeroprecisionusa.com/m4e1-magpul-stealth-grey-builder-set.html

We received an email from UCWRG (Umbrella Corporation Weapons Research Group) the other day that had some good intel in it and wanted to share it with anyone who didn’t receive the email as well.

If you resisted the urge to immediately click over and buy one of the UCWRG Raptor charging handles that were back in-stock and kept reading they included some good info on what changes are going on at UCWRG right now. New UCWRG BCGs will be released soon and they continue to have an issue with getting forgings that are up to their high quality standards. 

If you kept reading past that you get to what we all are interested in…UCWRG BILLET!! I am fortunate to own one of the very first UCWRG billet ambi lowers ever made and love it (its featured in a  lot of my SBR photos). UCWRG has never been able to keep up with demand for their products but it appears they may have figured out some of their production dilemmas as they are about to release a NEW billet lower and drumroll….billet upper. Photos and details below.

UCWRG billet lower v2UCWRG Billet Upper

We have a new billet lower design complete and we’re excited to get them out there. While we’d like to have receivers ready before the election, we’re pushing to have them finished before Christmas. Timelines can change, especially after November. Like our first billet design these will include the ADAC for right side bolt catch. We’ve made a few improvements to this lower; the magwell bevel is deeper and by popular request we’ve added a tension screw. You might also notice we’ve switched the logo from the 3D version to our standard deep laser engraved umbrella. These lower receivers still feature our unique magwell geometry and are WEDM cut for an even smoother finish. Billet uppers will follow soon after the lowers are released to complete the pair.

UCWRG SBR 620

So, if you’ve wanted to get on the UCWRG train, your chance might be coming sooner than you realize. I hope this means good things going forward for UCWRG and they do make a phenomenal product. Getting it out to the consumers is the key. You can check out all of the UCWRG products at www.UCWRG.com.