Tag Archives: Lower Receiver

American Defense Mfg Announces new ADM4 Receivers and Rifles

The following is an announcement from American Defense Mfg:


American Defense MFG® (ADM) announced the release of their “ADM4” receivers and complete rifles. This design variant is purely aesthetic in nature. These lower receivers will retain their patented, fully ambidextrous controls that are intuitive in design and function. Perfect for retro builds (with modern features), NFA Engravings, and is also available to other manufactures wanting ambidextrous controls for their brand. Available now via their dealer network and direct from American Defense Mfg®.

ADM ADM4 Receiver

ADM4 billet 7075-T6 lower receiver features a Type III Teflon impregnated hard-coat anodized finish, outfitted with their patented ambidextrous magazine release, ambidextrous bolt catch and release, and their dimpled take down and pivot pins. The trigger guard is ready for winter gloves without manipulation. Radii and chamfers throughout make this billet lower a marvel that stretches the capabilities of modern production CNC manufacturing. A 20-degree competition style mag well is concealed in the design, allowing lightning fast magazine changes. An integral upper/lower tension adjustment screw allows the end user to compensate for tolerance between your upper receivers and your favorite lower.

The ADM4 Lower Receiver has a MSRP of $284.95.

Click HERE for more information.

ADM ADM4 Rifle

ADM Universal Improved Carbine (UIC) ADM4 Mod 2:

Built on a billet aluminum, fully ambidextrous upper and lower receiver set, the ADM UIC ADM4 MOD 2 is the flagship carbine of the UIC line.


ADM Universal Improved Carbine (UIC) ADM4 Mod 2 has the following features :

Lower Receiver

  • Slick Side Mag well
  • Fully ambidextrous controls featuring a right side bolt catch and release lever and left side magazine release.
  • Ambidextrous safety selector
  • 20 degree competition style mag well.
  • Enlarged trigger guard
  • ADM HD Buffer
  • 2-Stage Match Trigger
  • QD Endplate
  • Integral upper/lower tension adjusting screw

Upper Receiver

  • 16” 1:8 twist, .223 Wylde Chamber, 4150 CMV Criterion Barrel.
  • Milspec Enhanced BCG with a Nitride QPQ finish.
  • Ambidextrous Charging Handle.
  • Milspec mid-length gas system.
  • 13.5” MLOK Handguard.
  • Battlecomp 1.0 muzzle device.
  • Magpul PRO BUIS.
  • **Model specifications may change at any time due to component availability**

Materials & Construction

  • 7075 Billet Lower and Upper Receiver.
  • Hard coat type 3 Mil-Spec anodized for a lifetime of performance.
  • Made with pride in the U.S.A.


ADM Universal Improved Carbine (UIC) Mod 2 has the following specifications :

  • Weight: 6.2 Lbs (Unloaded)

The ADM4 Mod2 Rifle has a MSRP of $1,850.

Click HERE for more information.

Primary Weapons Systems AR Build Breakdown

A lot of times I am asked about the parts that make up a rifle build, so I am revamping a series of “Build Breakdowns” that explain what parts were used to put a certain rifle together.  Each part or grouping of parts will be listed below the image and will be hyperlinked to the Rainier Arms website, or another site if not available on Rainier, where you can learn more about the parts or to make a purchase.

This build focuses on a Primary Weapons Systems Build that I recently put together.  The build started as a separate upper and lower receiver set that were mostly complete from the factory.

Primary Weapons Systems Mk1 Mod2 Lower and Mk1 Mod1 Upper Receiver with Vortex Viper PST Scope in a Bobro Engineering Precision Optic Mount 003-1000

If you see a build that you want to know more about, please let me know.


Cross Machine Tool Releases the UHP15-SSA AMBI Lower Receiver

Cross Machine Tool SSA ambi lower 3

Cross Machine Tool has released the new UHP15-SSA Lower Receiver.  SSA stands for “Smooth Side Ambi”, which features all of the standard Ambidextrous features of the UHP15A Lower Receiver without branding and logos present on the left side of the lower.

Cross Machine Tool SSA ambi lower 2
The purchaser can opt to have Cross Machine Tool to laser engrave a personalized SBR or Trust Information on the receiver.  The laser engraving is at a depth of .003″ which is in line with BATFE requirements and can be placed on either the right side of the receiver above the trigger pin hole or on the bottom of the trigger guard.

Cross Machine Tool SSA ambi lower 1

The 9.9 oz UHP-15SSA is CNC machined from 7075-T6 billet aluminum and is finished in Type III, Class II Anodized Black.  The UHP-15SSA features standard diameter trigger and hammer pin holes, “Safe” and “Fire” selector markings, an Integrally Machined Trigger Guard, a Flared Magwell that is compatible with USGI and PMAGs, an Upper Receiver Tensioning Screw and has a Bolt Catch Screw included.

Cross Machine Tool SSA ambi lower 4

The MSRP of the UHP15-SSA is $229.00, but is available at an Introductory Price of $199.00.  Engraving is an extra $30.

For more information, please visit:


James Madison Tactical .308 Polymer Lower Intro Pricing

Rainier Arms is offering introductory pricing of the James Madison Tactical (JMT) .308 Polymer Lower Receiver and Jig at $124.95 (regular $139.95).

Key enhancements include:
  • Extended upper fire control box sections.
  • Upper left magazine well box section.
  • Webbed magazine wells L & R side (matched for MagPul) magazines.
  • Extended bolt release roll pin posts.
  • New JMT Gen2 logo markings.
  • DPMS Compliant

For more information on the lower and JMT, visit JMT’s webpage, CLICK HERE.

To order the JMT .308 Lower Receiver at the Introductory Price, visit Rainier Arms, CLICK HERE.

Aero Precision AR15 Gen 2 Lowers

Aero Precision has designed and have now released their AR15 Gen 2 Lower Receivers.


The Gen 2 lowers feature a nylon tipped upper tension screw that will allow the user to fine tune the fit of the two receivers.  The tension set screw is inserted in the grip tang of the lower and will provide a tight fit with any standard AR15 upper.


The Gen 2 lowers also feature an increased magwell flare to allow for easier insertion of magazines while providing a sleeker look.


Though Aero Precision usually has a very wide variety of color finish options, the Gen 2 lower will initially only come in anodized black.

Currently these features are only available in the AR15 standard lower receivers, though will be available in other configurations in the near future.


The Gen 2 lower retails for $90.00 and can be ordered through their webpage at:  http://aeroprecisionusa.com/aspx/store/productdetail.aspx?pid=49

Dimensional Firearms DF-15 Shocker Lower Receiver

Dimentional Firearms DF15 003For those who have a sense of humor and are looking for a forged AR15 lower receiver with some flair should check out “The Shocker” from Dimensional Firearms with their new DF-15.

I will allow the below photo explain itself to what makes this lower unique from the others.

Dimentional Firearms DF15 002


This lower is currently only exclusively through Revolvr.com or the Revolvr App on your phone and is offered for $94 plus $5 shipping for a low final price of $99 (plus any local FFL fees).

Check out the link below for more detailed information about the lower.


Dimentional Firearms DF15 001

New Webpage: Battle Arms Development


Battle Arms Development, the company most famously known for the Battle Arms Development-Ambidextrous Safety Selector, aka BAD-ASS, has really blown up in what they are currently offering to include the Enhanced Take Down Pins, Lower Receivers, and Barrels, Receiver Sets and OIP complete rifle to come out soon.

This is definitely a company that is investing in their R&D and one that should be kept on your radar.

Check out their NEW Webpage with all of their current and up-and-coming offerings.


Aero Precision Special Edition 2A Lower

Aero Precision IIA Edition Lower Receiver 006wm-1000

Aero Precision has released a new special edition 7075-T6 forged aluminum lower receiver, commemorating the Second Amendment.   This lower is matte black hard-coat anodized and features an attractive 2A logo on the right side of the magazine well.  The rear take-down pin detent hole is threaded for a 4-40 set screw to keep the install of the end plate and buffer tube “flying detent” free.  The 2A lower receiver will work with all standard AR-15 parts, accessories, and magazines.

Aero Precision IIA Edition Lower Receiver 001wm-1000
The Model of this lower is appropriately marked IIA and the Serial Number starts with 1791.


Aero Precision IIA Edition Lower Receiver 002wm-1000


The Second Amendment Lower is available in the Aero Precision online store for $105 at:  http://aeroprecisionusa.com/lower-receivers/ar15-stripped-lower-receiver-special-edition-2nd-amendment.html

***All FFL Rules and Laws apply.