[SHOT 2016] Heizer Defense PKO-45 Pistol

Heizer Defense makers of the single shot PS1 pocket shotgun and the single shot pocket pistol chambered in 7.62x39mm released their first semi-auto pistol at the 2016 SHOW Shot. Their new PKO-45 semi-automatic pistol is made in the USA and chambered in .45ACP and is marketed towards the conceal carry market. It’s pretty thin and flat at just .8 inches wide. All the controls are flat and very flush with the pistol making it very snag free. Heizer Defense actually claims their new PKO-45 pistol is the slimmest semi-auto on the market.


The Heizer Defense PKO-45 is made out of USA aerospace grade stainless steel with a titanium version in the works too, the model I saw at the SHOT Show appeared to have some plastic parts as well. It features a barrel under the guide rod configuration for less recoil. A 9mm and 380 auto model is in the works, the .45ACP variant carries 5 plus one with the flush magazine and 7 plus one with the extended magazine. It felt good in my hand and it pointed pretty well. The only downside I felt was the weight, their all stainless steel model weights in at a hefty 28 ounces, in comparison the Ruger LCP weights in at 9.6 ounces. Pricing is TBD, check out heizerdefense.com for more info.

Ray I.

Long time gun enthusiast, archery noob, Mazda fan, Sci-Fi nerd, Whiskey drinker, online marketer and blogger. My daily firearms musings can be found over at my gun blog ArmoryBlog.com and Instagram.

Shoot me an email at ray.i@staff.thefirearmblog.com


  • smartacus

    i wonder how this compares to my .45 AMT Backup

    • Leigh Rich

      I have a 45amt Back up. I looked it up on Google what ever that is??? LOL
      AMT BackupWeight18 oz (0.51 kg)Length5 inches (13 cm) We need the dimensions.

  • kipy

    Its weird they started with 45 instead of 9mm

    • Jwedel1231

      “If it worked for Springfield, it will work for us!” – Heizer exec

      But really though, the market is choked with the single stack thin 9mms. A .45ACP will make it stand out.

      • iksnilol

        There’s a reason the market is “choked” with single stack 9mms.

  • Richard M Henderson

    Compare it to a comparable 45 and not a tiny 9.

  • Mick Finn

    That’s a heavy gun. I’d like to fire it to see how the felt recoil is, maybe the extra weight is worth it. To me, Heizer seems to be priced on the high side for what they are. Nearly $500 for a single shot pistol seems high so I’ll be interested to see where they price this one.

    • Leigh Rich

      I own a Downsizer single shot tiny pistol and a Semmerling 45…don’t say recoil and small.

  • Sianmink

    More weight maybe isn’t a bad thing on a tiny .45. 28 ounces seems excessive though.

    • Harrison Jones

      It’s like you’d have to work to make it that heavy. A 1911 is only 40oz and I would guess is 3x the size of this gun. But in a 45 that small it may need to be that heavy.

  • Brocus

    I’m not one for guns with grips where fingers are left dangling, but that sure looks interesting.

    • Leigh Rich

      They why post? Are you the center of the universe?

  • Mcameron

    hrmmm…..28 ounces…..i can either carry a 6 shot .45 subcompact……OOOOR i can carry a full sized G17 with 18 rounds on tap.

    gee thats a tough decision.

    • Leigh Rich

      You must not have enough $ to own more than one or two guns? Sorry…you don’t have to buy one.

  • wetcorps

    Are guns really made of “aerospace grade” materials, or are spaceships made of gun grade stuff?

    • Dave

      The differences between actual aerospace industry spec alloys and what is “aerospace grade” in marketing may as well be an entirely different steel for the lack of similarity between them, trust me, if they were true aero alloys, you would pay 3x extra at a minimum.

      • Pug

        As a metallurgical engineer who has worked in both the areospace & steel industries, I hate to break the news but there is no such thing as an a “aerospace grade stainless steel”. The same grades are used for for all applications. If you make a pump impeller out of 316 stainless and then use 316 in a rotor for an aircraft does it magically become an “aerospace grade”, no. In addition, AMS (aerospace material specifications) call outs do not assura a superior product.

  • Ahil925

    If I remember correctly this is a pure blowback design.

  • Kitsuneki

    is it compatible with glock mags?

  • Leigh Rich

    I’d buy it in a heart beat!!

  • Martin frank

    My s&w 327PC only weighs 24.7 oz loaded with 8 357 magnum rounds!