Review: BAD-EPS (Battle Arms Development – Ehanced Pin Set)

You probably never think of your AR-15’s pivot pin and take-down pin until you are fishing around in your gear looking for some kind of improvised tool to push a stubborn one out so you can access the interior of the receiver for some reason. You may not think much about your pivot and take-down pins but Battle Arms Development does and they set out to make them better.

BAD EPP Detent Retention


The BAD-EPS is sold in a set. Each set consists of an EPP (Enhanced Pivot Pin) and ETP (Enhanced Take-down Pin). Each set also comes with two KNS hardened stainless steel detents, two 17-7 nickel plated stainless steel pin springs, and a high-strength neodymium magnet (more on that magnet later).

They are machined from 12L14 steel bar stock, case hardened, and finished in milspec black maganese phosphate.

BAD ETP Installed

Observations from Use

These little buggers are packed with features. The most revolutionary of the features will change the way you assemble lower receivers forever. The EPP (pivot pin) has a small dimple at the end that, when used with the included magnet, holds the detent in place allowing you to simply depress the pivot pin spring and press it into place the receiver with the detent itself. A job that used to be a severe pain in the rear can now be accomplished in a few seconds with one hand. It is like magic. I never want to screw around with a standard pivot pin again.

The rest of the features deal with making the pins easier to use after they are installed. Battle Arms Development added features to the pins to make them easier to press out of the receiver and easier to grasp.

The pins are about .030″ longer than a standard pin. This makes them considerably easier to press out of the receiver and easier to grasp when you have pushed them through. That little .030″ extra length makes a noticeable difference, especially when you push them in as far as the receiver will allow with your finger or a blunt tool because now the heads are sticking out the other side of the receiver .030″ further than they would be with standard pins.

BAD ETP Pushed

The pins also feature shallow divots on the tips. These divots serve to help “trap” whatever tool you might be using to press the pins out so the tool is less likely to slip off the pin and mar the receiver. I don’t necessarily care about marring the receiver but I like that the divots allow me to use more force without slipping off the pin. Basically, they make using a tool to push the pins a lot easier.

The pin’s heads are both works of functional art. Battle Arms Development has managed to add grip without adding bulk. The heads on these pins are the same size as standard pins. That is a good thing because bulky pins can interfere with the use of an ambidextrous selector. The EPP features small dimples and an undercut shape that improve grip. The ETP has fine checkering around the circumference of the head and an broad, undercut that is strategically located to let you hook your finger tip under the pin head for removal.

BAD EPP Installed

Wrap Up

Standard pivot and take-down pins work. The Battle Arms Development Enhanced Pin Set works better. I am not sure I can honestly say that these are “must have gear” but I can honestly say that I wouldn’t want to be without them – especially if I was building a new lower and wrestling with the pivot pin installation.

Check out the BAD-EPS at Battle Arms Development.

4 Responses to Review: BAD-EPS (Battle Arms Development – Ehanced Pin Set)

  1. Specops October 7, 2013 at 12:03 #

    Out of stock 🙁

  2. HSR47 October 8, 2013 at 23:12 #

    Installing a standard pivot pin is actually pretty simple if you have the right tool:

    • nsz85 October 10, 2013 at 19:25 #

      True, but that tool can be lost and after shipping is half the cost of a BAD-EPS. Spend smarter 🙂

      • Matt October 10, 2013 at 19:52 #

        Agreed and the ease of installation is certainly not the only reason to consider the BAD-EPS.

        Thanks for stopping in nsz85. I have been a subscriber to your channel for a while now.

Powered by WordPress. Designed by Woo Themes