Battle Arms Development Enhanced Pin Set

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Battle Arms Development Enhanced Pin Set

Battle Arms Development Enhanced Pin Set (BAD-EPS) for the AR15 / M16 / M4 style rifles. The set consists of the Enhanced Takedown Pin (BAD-ETP) and Enhanced Pivot Pin (BAD-EPP). Precison Swiss CNC machined from round stock steel bars, the BAD-ETP & BAD-EPP are case hardened and finished in milspec black maganese phosphate.


The BAD-EPS features the following improvements and features:

  • AR15 / M16 / M4 Compatible - Fits all AR15/M16/M4 lower receivers with mil-spec .250" diameter front pivot and rear takedown pin holes.
  • Patent Pending Pivot Pin & Takedown Pin Head Designs - Greatly improved gripping surface and pull strength without the use of oversize heads.
  • Low Profile Pin Heads - Low drag and never in the way. Lower profile than mil-spec pin heads.
  • Ambidextrous Safety Compatible - The Enhanced Takedown Pin (BAD-ETP) head design does not obstruct the use of the right side ambi safety selector lever.
  • Extended Pin Tips (+0.030" over milspec) - Added tip length noticeably aids in starting/pushing the pins out from the left side of the receiver, without undue protrusion.
  • Bullet Tip Guide - Cone shaped recess at both pin tips prevent accidental bullet or tool slip and reduced the chance of scratching/damaging of the receiver.
  • Patent Pending EZ Guide Channel & Magnetic Assist Install - Easy, hassle free magnet assisted installation of the EPP (Enhanced Pivot Pin). No more lost detents and springs.

Each BAD-EPS comes with (1) BAD-ETP, (1) BAD-EPP, (2) KNS hardened stainless steel detents, (2) 17-7 nickel plated stainless steel pin springs, and (1) high-strength neodymium magnet for hassle free magnet assisted installation of the Enhanced Pivot Pin (BAD-EPP).

Proudly designed and manufactured in the U.S.A.


1. AX556 owners please note that the EPP (Enhanced Pivot Pin) is incompatible with the AX556 receiver due to the receiver's proprietary design. The ETP (Enhanced Takedown Pin) will work as designed.

2. Depending on your M16 receiver, may not be compatible with the KNS anti-walk sear pin without modificaiton to the KNS anti-walk sear pin. 3. Neodymium magnet is not a toy. Use only for the installation of the EPP. Keep out of reach of children.


  • 5

    Posted by RoninBasketball on 23rd Mar 2023

    Nice finish.

  • 5
    Great company and prices

    Posted by Donald on 14th Jan 2018

    Not my first nor my last purchase from SKD. They have a great selection with great prices and fast shipping. Thanks again guys!!!!

  • 5

    Posted by Mike w on 7th Jan 2018

    I bought one of these not knowing what to expect and i am impressed. I love very precisely machined parts and this pin set did not disappoint. They are VERY tight on my PWS lower and BOOTLEG upper build, so much so that i had to lightly tap the front pin in and out. But they removed all of the side to side wiggle from the receivers. They are a little longer than a standard pin set. Again from what i have seen of battle arms' products, these are to notch.

  • 5

    Posted by Bill Wood on 21st Dec 2016

    Easy to install. Works nice!

  • 5
    I put these on all of my AR's

    Posted by SamHill on 22nd Nov 2016

    A nice little upgrade. Easy to push out with only finger tips.

  • 4
    Good upgrades

    Posted by SamHill on 22nd Nov 2016

    I like these.

  • 5
    Milspec works, but these may lessen frustration

    Posted by Roy on 17th Jan 2016

    I purchased these pins to make takedown easier for my wife. She can use milspec pins but these make takedown a breeze.