Cyber Monday Sale at Brethren Arms


We’ve pulled the stings to get you great pricing on some of the best Vortex has to offer.




The Brethren Arms Cyber Monday Sale has ended.

Click here to view and build your very own custom MP5 Roller Lock firearm.


Black Friday Sale at Brethren Arms


Shhhh… it doesn’t need to be said.

We know you came here looking for a deal.

That is why we put together 5 stellar roller locker and silencer packages for you.




The Brethren Black Friday Sale has ended.

Click here to view and build your very own custom MP5 Roller Lock firearm.


New Brethren Arms Website

Welcome brethren, to the new and improved Brethren Arms website.


As with anything new, there is a break-in period. Areas of this website are still being updated and improved as we obtain feedback and suggestions from our valued customers.

Past customers and those with existing orders may notice that they are unable to access their prior account on this new system. Not to worry! The old website and all previous orders still exists, just not public. Our fabrication and order fulfillment department has access to the old website and is busy doing what it does best. Getting your order(s) fulfilled!

As your order goes through the fulfillment process we will do our best to keep you notified. We are currently working through approximately 60 orders with an estimated 30 day cycle producing between 15 to 18 firearms. We are committed to quality (not speed) and remain focused on delivering your orders as soon as professionally possible. We thank you for your patience and appreciate your business patronage.

All throughout this month and possibly the next (December) we will be looking into integrating all prior customers and orders into our new web platform.

In the mean time, our technology department welcomes your feedback and suggestions with regards to the new website.

0 + 7 = ?

Brethren Armament Company Update

As we usher in a new year, Brethren Armament LLC has experienced some changes over the Christmas Holidays. We would like to share these with you and your company.

  1. Quinn is no longer an officer of Brethren Armament LLC. Quinn is venturing off into his own projects and we wish him the best of luck.
  2. Kyle McIntosh has been voted in as President of Brethren Armament LLC. Kyle has been VP since the founding and will continue with all duties within Brethren Armament LLC.
  3. We welcome Doug Hatch as our new Vice President. Doug has been with Brethren Armament LLC for a while now and is ready to step into his new role.

We look forward to a great 2017 working directly with all of our Vendors, Contractors, Retailers, Suppliers and Media Contacts.

Please feel free to reach out to us if necessary and we look forward to working with you as we begin the new year.

View the Brethren Armament 2017 Original Signed Notice (pdf)

Kyle McIntosh
Brethren Armament LLC

Doug Hatch
Vice President
Brethren Arament LLC

HK Logo

Improved Trigger Group, Hammer Buffer


Trigger Group (lower) replacement device for Heckler & Koch (HK) Roller Lock Firearms

  • Single component houses all trigger components, provides interface for pistol grip, and mounts to the firearm via a rear push pin and the trigger group mounting shelf behind the magazine well.
  • Ar-15 style interface for attachment of pistol grip.

Hammer Buffer

  • Curved hammer surface maintains contact with bolt carrier group (BCG) during rearward motion of bolt carrier.
  • Rearward bolt carrier group force countered with:
    • Use of a pivoting strut, spring and heim joint assembly
    • Torsion springs
    • Constant Force Coil Spring
    • Dual captive Recoil spring assembly

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HK Logo

Hammer Buffer, Design Summary


The firearm from which this invention was created was originally designed and produced in 1957; The CETME Model A. It was later procured, updated, and manufactured by the German Company Heckler & Koch, with the most famous variants being the G3 and MP5. The G3 in particular was utilized world-wide, and is the third most produced firearm in history.

Although these firearms have decades of proven effectiveness, there have been inherent design drawbacks since the original prototypes. The most notable being the lack of “fine tuning” of the firing cycle, and poor ergonomics/performance from the trigger mechanism. These drawbacks however contained the inspiration and part of the solution to both issues. It is unknown how much the original designers recognized the mechanics at play, if at all. It is clear that they were never pursued further by either parent company, and the designs themselves have faded into obsolescence.



Roller Delayed Blowback Firing Cycle

Roller Delayed Blowback Firing Cycle


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How to best set up your BAP’s with optics

A question we get asked frequently is how to best set up your BAP’s for optics. There are several options we suggest and will try to provide you with the positives and negatives of each in this article.


Option 1

Run a micro-type or Rugged Miniaturized Reflex (RMR) style sight.

The first option is to run a Micro-type or Rugged Miniaturized Reflex (RMR) style sight directly on the rail. This gives you the the height over bore the gun was designed for and gets you real tight behind the gun (which might be good or bad depending on your shooting style).

The two biggest drawbacks are from co-witnessing of the sight. Depending on which optic you use (Aimpoint micro, Vortex SPARC II, RMR) you may or may not be able to actually co-witness through both sights. You can use the front sight alone in a pinch, and the gun is pretty accurate out to at least 50 yards this way, even more if you know how to index the top of the rear sight with the front this way, called “shooting the notch“.

The other problem being that even if you can co-witness, you will find your field of view to be quite busy. There is no lower third co-witness with this gun; you will be looking directly through the front sight. Some guys have trained like this, and don’t find it much of a hindrance, but to each his own.

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