When people that have been shooting for a while ask me for the best upgrade, I usually tell them a good trigger. For newer shooters, it’s dry fire practice, but that’s a different story. Since I’m on the trigger subject, Blackout Defense has come out with their Zero trigger for the AR15 and AR10 platforms. Blackout Defense sent me a curved shoe trigger with a 3lb pull. This is one of the best single stage triggers I’ve had the pleasure of using.

When you first see the Zero trigger, you don’t really notice anything different about it. The differences are on the inside, and become quickly apparent, more on that later. First off, it’s a cartridge style “drop in” trigger assembly. This makes installation easy. I’d recommend the anti-walk pins, as I would with any cartridge style trigger. They just give that little bit of added security, even if it’s just in my mind. As mentioned, I opted for the curved trigger. The curve is not near as much as a stock GI trigger. I would call it a short radius, but it’s appears to be a pretty standard profile for aftermarket triggers. I really like the curved profile, it works really well for me. If you don’t like curved triggers, they make it in a flat profile too. For me, the curve gives a consistent finger placement, so the felt pull is always the same.

Now for the Zero trigger internals. What makes the Zero trigger so unique is its ability to completely remove pre-travel and over-travel. So much so, that the total trigger movement can be set to 0.078”. Part of this is accomplished by a curved or cupped trigger tail. This “cup” allows the tail to cradle the safety drum. To fully adjust, or get rid of, the pre and over travel. Hardened set screws are installed on the bottom of the trigger housing, both at the front and the rear. From Blackout Defense’s website - “The bottom of the Zero™ trigger housing features threaded holes that straddle both the front and rear of the trigger tail. Hardened set screws are provided and can be installed through these threaded holes to finely tune the trigger location and push it into contact with the safety.” The trigger tail riding on the safety drum is what eliminates the pre-travel and is adjustable through the rear set screw. The over-travel is then adjusted with the front set screw. Once set, red loctite is recommended to keep them from moving. My only complaint about this process is that it is tedious work. Mainly because you have to pull the trigger out, turn the set screw a tiny amount, then reinstall the trigger and try it again. Be patient, it could take a while. The Zero trigger is so well made, that these tedious adjustments aren’t really needed for a great trigger pull. I just needed to see how it was done, as it is an option. The trigger will fit in any mil-spec lower, but if you don’t want to take the trigger in and out to adjust it, Blackout Defense’s lower receiver has 2 small holes in it, so that you don’t have to take the trigger out for this adjustment. The Zero trigger also has two different finish options for the internal components. Either Black Nitrided, or NP3. Both finishes help with lubricity and corrosion resistance. After factory setting the trigger pull weight, Blackout Defense then arc welds these set screws to make sure that they never come out of the factory adjustment. Note: these are different from the set screws used to adjust the pre and over travel, these are the ones the factory uses to adjust the pull weight (see inside the trigger housing picture). As you can see, those two screws aren’t ever moving.

Two different trigger pull weights are available from the factory. Either a 4.5lb pull or a 3lb pull weight. I opted for the 3lb pull weight. When I measured it, it is consistently under the 3lb mark. Anywhere from 2-¾ lbs up to just shy of 3 lbs. Follow that up with the super short pull and the super crisp break, it feels like less. The reset on the Zero trigger is also great. Super crisp and tactile. The reset impressed me for a 3lb pull weight trigger.

The Zero trigger has me sold. It is one of the best single stage AR triggers out there, at least in my opinion. It works spectacularly when shooting fast. I can consistently shoot a rifle bill drill (6 shots, A zone hits, 7yds) 0.25-0.30 seconds faster then when I use the same upper with different triggers. It works really well for precision shooting also. Having that short crisp pull allows me to not disturb the rifle when pulling the trigger slowly. Does it help my groups? Who knows, but I do know it’s easier for me to not move the rifle.

While running the Zero trigger, I put a lot of time into dry fire. Well, maybe not dry fire, but the Mantis Blackbeard. This gave me the thousands of trigger pulls I needed to really fall in love with Zero trigger. The trigger never had a single hiccup, either dry fire or live fire. The super fast reset and crisp break made it a dream to use with the Blackbeard system.

When it comes to aftermarket triggers, the Zero trigger is a gold mine. This trigger does everything I want in a good AR trigger. Yes, the light, short pull may not be for everyone, but if you are looking for a super fast trigger, it might just be for you. Having the ability to have ZERO take up and overtravel really makes the Zero trigger shine. If you are looking for a great trigger for your AR, I would definitely give Blackout Defense a call. They are super helpful if you need any questions answered about the Zero trigger, or any of their other products.

Firearms Insider Reviews - 8 Key Points

Claim to Fame:

AR15 trigger with zero take up and overtravel

Target Market:

Those wanting a great, fast trigger for their AR style firearms

FNBs (Features & Benefits of this product):

Single stage drop in trigger for AR-15
Short reset design
Fits any MIL-SPEC AR-15 lower receiver
Trigger and Disconnector: A2 Tool Steel
Black Nitrided trigger
Black Nitride disconnector
Hammer: S7 Tool Steel
Black Nitrided hammer
Balck anodized aluminum housing
Hardened set screws to adjust pre and over travel
0.154” pin diameter
Curved trigger tail

What other aesthetic options or finishes are available?

4.5 lb, NP3 finish, Straight bow, AR10’s

What others are saying?:

5/5 stars - Charles @BlackoutDefense

SPOOKY PERFECT TRIGGER

I shot National Match Competition on the USMC Shooting Team at Quantico “back in the day”. We fired highly-tuned M-14’s built by amazing craftsman.

Everyone was obsessed with trigger performance.

This is the trigger we were always chasing, only better.

First, there really is no takeup. Apply 4.5lbs with absolutely zero creep. The trigger breaks clean, moves about .05″ and stops.

Release the trigger and it resets: click. Press again. Zero creep, breaks at 4.5lbs, and stops dead. All. Day. Long. Absolutely consistent. It’s uncanny.

After the Marines, I worked my entire career with High Tech CNC manufacturers. So, I know what it takes to make something great: engineering, equipment, people, and quality control. It takes them all.

Hats off to Customer Service too: fast, friendly, efficient, responsive and effective. Thanks.

Does this sound like a paid endorsement? It isn’t. I paid full retail for the NP3 All with Trigger Pins direct from the Blackout Defense webstore.

I am just an ex-Jarhead who knows that you (often, hopefully) get what you pay for. In this case, I got more than I thought was even possible. Nice upside surprise.

To my fellow trigger-obsessed perfectionist, you won’t be disappointed.