American Air Arms An inside look at the AAA Slayer

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The Slayer appears to be a simple platform until you take it apart and see not only the excellent machining but each piece is masterfully designed for its purpose.

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The balanced valve is much different from the ones I’ve seen. Instead of the venting chamber being inside of the valve stem, it is a part of the valve body. A valve return spring is not used. So when the rifle is degassed the poppet is lifted off the valve seat and remains that way. When airing the rifle back up it leaked through the valve because the poppet was off the valve seat. Gave it a strong blast of air from the tank but it still wouldn’t seal. I took off the air tube to access the poppet and pushed it down to seal the valve.
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The retractable probe is an innovative design. When the rifle is cocked the probe releases an extension that will push the projectile into the barrel. Upon closing the probe a spring loaded mechanism is triggered and retracts the probe. This creates an unobstructed path for air to flow. Also contributing to optimal airflow are the angled and radiused ports. These are mods that guys will do to their rifles but Tom had the foresight to incorporate them into the design.
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The moderator is a modular design built specifically for the Slayer. It is well built and does a good job at taming the bark despite being smaller than what is normally used for a big bore. Not backyard friendly but ear friendly.

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The trigger does not feel like a Bullpup trigger. There is no slop and it has crisp break.

So far I am very impressed by the quality of craftsmanship and design that went into the Slayer. Had fun resealing this one. Now I just have to find the time to get to the range and shoot it!

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@Pale_Rider I’m not familiar with this rifle. Did you have to remove the reservoir to seat the valve? Is it not suggested to bump the but to seat the valve when airing up?
At the time I had the chassis with rear stock off so I didn’t think to bump the stock. Probably wouldn’t have thought to do it even with the rear stock attached. I’ll try that next time.
 
At the time I had the chassis with rear stock off so I didn’t think to bump the stock. Probably wouldn’t have thought to do it even with the rear stock attached. I’ll try that next time.
@Pale_Rider Please let us know if bumping the stock works to seat the valve. From what I’ve read that the Slayer is designed different from the Evol and is a bit more challenging to work on.
 
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The Slayer appears to be a simple platform until you take it apart and see not only the excellent machining but each piece is masterfully designed for its purpose.

View attachment 491933

The balanced valve is much different from the ones I’ve seen. Instead of the venting chamber being inside of the valve stem, it is a part of the valve body. A valve return spring is not used. So when the rifle is degassed the poppet is lifted off the valve seat and remains that way. When airing the rifle back up it leaked through the valve because the poppet was off the valve seat. Gave it a strong blast of air from the tank but it still wouldn’t seal. I took off the air tube to access the poppet and pushed it down to seal the valve.
View attachment 491934


The retractable probe is an innovative design. When the rifle is cocked the probe releases an extension that will push the projectile into the barrel. Upon closing the probe a spring loaded mechanism is triggered and retracts the probe. This creates an unobstructed path for air to flow. Also contributing to optimal airflow are the angled and radiused ports. These are mods that guys will do to their rifles but Tom had the foresight to incorporate them into the design.
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The moderator is a modular design built specifically for the Slayer. It is well built and does a good job at taming the bark despite being smaller than what is normally used for a big bore. Not backyard friendly but ear friendly.

View attachment 491938

View attachment 491939

The trigger does not feel like a Bullpup trigger. There is no slop and it has crisp break.

So far I am very impressed by the quality of craftsmanship and design that went into the Slayer. Had fun resealing this one. Now I just have to find the time to get to the range and shoot it!

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Awesome I've never seen a valve like that...
 
  • Wow
Reactions: mandn
Well I am late to the party and you have the Slayer all back together, so this stuff will have to wait until the next maintenance cycle...

On the valve, I polish the bore where the piston rides with a Dremel and 3/8" cotton polishing mop until it shines like a brass mirror. I also polish the rear valve stem to a mirror finish. On the valve piston and stem o-rings I use urethane ptfe o-rings to prevent stiction and first shot lower fps symptoms that come with stiction of other o-ring material over time. On the stem o-ring you can use Krytox GLP205 ptfe grease lube or Ultimox 226. I don't lube the valve piston o-ring any more because I found it makes a green corrosion ring in the valve body, which may be why there's stiction over time. (I'm still experimenting with eliminating stiction there).

When assembling the valve into the receiver the three o-rings are tricky to get past the transfer port without cutting them. A curved piece of plastic tube, the same diameter of the transfer port and radius as the valve body will help slide them in easily. Alternatively, a blunt plastic pick can be used to work the o-ring in past the edges of the port.

To re-gas the cylinder and get the valve to seal I do bump the back end on a rubber pad and pour the air to it while tightly covering the transfer port with my thumb. The valve finally seats somewhere about 1500 psi, and if it doesn't seat I just keep adding more air and pressure. I learned that after many trial and error, and unneeded disassembly.

The new Slayers are in the works and should be here shortly.