This is a special guest report on reader Ian McKee’s (45 Bravo), Air Venturi Avenger Bullpup in .177 caliber. I’m calling it Part 3 of his report, though none off the parts is marked that way.

As you know, I am also doing a report on a .25-caliber Bullpup, so Ian is looking at the other end of the spectrum, and today’s report is a special one.

If you’d like to write a guest post for this blog, please email me at

Take it away, Ian.

.177 Avenger Bullpup Quick Shot: Part 3
By Ian McKee

Avenger bullpup
Air Venturi Avenger Bullpup.

Part 1
Part 2

This report covers:

  • The Quick Shot kit
  • Begin
  • Using the Quick Shot
  • Pros
  • Cons

Avenger Bullpup Ian

Hello everyone,

Let me start off by saying what I am reviewing today is a Quick Shot kit designed by an owner of one of the Air Venturi Bullpups

The Quick Shot kit

Like many people, he felt the need for a forward cocking lever on the bullpup, and decided to not wait for the Gen2 Bullpup (if there will ever be one.) After many failures, and design changes he has reached a point where he thought it was ready for the public and posted a short video of a prototype in operation, and I reached out to get one of the first ones to test for him. 

It is made from some 3D printed parts, a hardened steel rod, a bronze bushing, a carbon fiber rod, and some adjustable links so you may adjust the length of the system somewhat to suit your preference. 

Avenger Bullpup assembly
There are very few parts, and installation takes about 10 minutes with no permanent modifications made to the gun. There is even a short video on You Tube showing the installation. 

The assembly is straightforward, and only requires a few tools — a 2mm, 2.5mm, and 3mm Allen wrenches and either a small adjustable wrench or needle-nosed pliers to adjust the length of the actuating rod.

Avenger Bullpup tools
The tools needed.

The video shows the installation clearly but I will also address it here with words and pictures for those who like to read instructions.


Start by making sure the gun is unloaded, and engage the safety. Remove your scope, then remove the Picatinny scope rail using the 2.5mm Allen wrench.

Put the front rod support into the front upright scope riser as shown, then align the cocking handle with the slot facing up into the corresponding slot under the rail system, and insert the hardened steel rod through the cocking handle into the front support bracket.

Avenger Bullpup front brace
Front brace installed.

Avenger Bullpup front brace rod
The rod is in the front brace.

Avenger Bullpup cocking handle
Cocking handle and the underside of the Picatinny scope rail.

Snap the rear rod/riser brace over the shroud, and slide it forward until the hole in it lines up with the rear most hole in the Picatinny rail. Insert the included tapered 2.5mm Allen screw into the mount and snug it up.

Avenger Bullpup rear brace
Rear brace.

Avenger Bullpup rear brace installed
Rear brace installed.

This rear brace is also being sold as a stand-alone item to strengthen the Picatinny rail because several owners have bent their rail somehow. 

Using the 3mm Allen wrench, remove your vertical side lever knob and put it and the screw in a safe place. Be sure to mark what they go to. There is an unusual-shaped lever adapter that replaces your factory cocking knob. A short 2.5mm screw holds it in place.

A small plastic piece with a threaded insert (the lever adaptor) also goes in the cocking handle area, the short 2mm screw screws in from the bottom, and the longer 2mm screw goes through the end on the carbon fiber rod and into the top side of the threaded insert. The forward end of the rod uses a 2mm screw to attach to the cocking knob, and you can adjust the length of the rod to where there is about 1/8th-inch clearance on either end of the cocking lever travel. 

Avenger Bullpup lever adaptor
Installing the cocking lever adaptor.

Avenger Bullpup attach operating rod
The operating rod is attached to the cocking lever.

Avenger Bullpup operating rod rear underside
The underside of the attachment.

Avenger Bullpup operating rod front
The operating rod is attached to the new operating handle at the front.

Operating rod is attached to the operating handle at the front.

Lightly lube the hardened steel rod where the cocking lever travels with grease or oil, the kitmaker says Ballistol works well.

Avenger Bullpup side view
Here is a look at the Quick Shot installed.

Avenger Bullpup top
And this is looking down from the top with the scope removed.

Using the Quick Shot

The Quick Shot requires a technique to operate smoothly and cycle the action completely, but after a few times you get the hang of it. 

For speed shooting from the bench it is great, it makes the Avenger bullpup more competitive, time-wise, with rifles that have forward side levers. If you like to load singly with the single shot tray, it doesn’t impede putting the pellet into the tray. 

So far, I have fired over 2500 rounds using the Quick Shot. I did notice after about 1200 rounds it didn’t want to fully cock the gun when using the left side handle, I found the screw that attached the linkage to the cocking knobs had loosened, and snugging it down again has cured that. 

The maker now suggests checking and lubing everything after every tin of pellets, but I had not done that until the 1200-round mark. 

I was initially worried about possibly changing the point of impact with the mechanism attached to the scope risers, but I have not noticed any problems with unusual shifts in the point of impact during my time with it so far and I have shot it at distances ranging out to over 100 yards. 

Pros and cons


The Quick Shot kit gives the Avenger Bullpup an ambidextrous forward cocking lever that some owners want, and many people have said the lack of one has been a deal-breaker for their purchasing an Avenger bullpup. 

The Quick Shot kit adds rear support to the long scope rail and a third point of contact for the scope rail. 

The left hand cocking knob is conveniently located for fast shots when shooting targets for speed, such as speed silhouette, or similar events. [Editor’s note: This sounds ideal for sports like Pyramyd Air’s Gunslinger competition, where there are many large prizes.]

You can still operate the cocking lever normally by grabbing the lever where the factory handle was originally.

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The right side knob is located about 4 inches forward of the pistol grip, so you have to reach forward to cock the gun right handed. But the maker is working on a possible fix for that. 

It takes a few shots to learn the correct technique to work reliably. 

If you don’t fully cock it you will double feed a pellet. 

It works with the factory-sized magazines and with the single shot tray. But some owners have bought  oversized high-capacity magazines for their Avenger Bullpup, and the Quick Shot kit will not work with them because of the actuating rod. 

What do I think about it?

It works, it is well made and well thought out. It solves a perceived shortcoming to the design that some owners want. 

I have tried it on both my .177 bullpup, and on my .22 bullpup, I think it will stay on my .22 pup, as the .177 is destined for Field Target work, where speed is not an issue. 

Whenever I can I encourage other people to shoot it so we can get feedback. I am always looking to promote airguns to new people. Most shooters like it as well as the gun.  

I had one person shoot it and he was surprised by the accuracy of the Avenger on steel at 100 yards, but he said it’s not as smooth as an FX.  I asked what model FX he owned, he admitted he did not own one, but he had shot one before. I asked why he didn’t own one as they are a well made airgun, and he replied, “The cost.” To which I replied that you have to look at this for what it is. This is a $400 airgun, with an $89 add-on that is making the airgun do something it was not designed to do. It will never be as smooth as a $1300 or more rifle. 

Everyone shoot safe, and have fun.