Date: 20/5/2019 5:34
BIRTHDAY SALE - 15% OFF + Free Shipping on $150+ orders! SHOP NOW

Air Arms S400 MPR / HFT 500 Low-Power Firing Valve

0.00 reviews
Air Arms S400.

Roll over image to zoom in

Share your images

1-year limited warranty



List Price $14.99 Save $2.00 (13%)

Add to Cart


Estimate Shipping

Add to Compare
Add to Wish list

Air Arms S400 MPR / HFT 500 Low-Power Firing Valve

  • Low Power Firing Valve Assembly for S400 MPR and HFT 500 air rifles.
  • For Low-Power Versions Only




Replace your worn out firing valve for your S400 FAC, S410 FAC, S500 FAC and S510 FAC with this Air Arms firing valve assembly.


In stock

Item Code: AAP-S370 [PY-A-8341]

other products by Air Arms

Create an online review and share your thoughts with other customers

Got a question? Got an answer?
Log in, then enter your text.

  • Paul from USA asked:

    What is a firing valve?

    • Tyler from USA:

      The firing valve is what opens and closes to control how much air is allowed into the transfer port and then down the barrel. It opens when the hammer strikes it. And closes with the help of a return spring to stop the flow of air during the shot cycle. The design and size of the firing valve is going to vary from gun to gun, this is for the Air Arms S4xx/5xx series rifles only.

You may also like

Air Arms Top.
Air Arms Top Sear
Air Arms Piston.
Air Arms Piston
Air Arms AA.
AA inlet valve
Air Arms Screw.
Screw M4x18 SKT
Air Arms CZ.
CZ 200 bushing
Air Arms EV2.
EV2 Shorty plug