Air Arms S400 Service & Tuning

Professional in-house servicing, tuning and anti-tamper work for the Air Arms S400, by technicians with over 15 years on Air Arms rifles.

Booking required — please contact us before sending, posting or dropping off any rifle.

Choose your service

• Anti-Tamper Removal — £100 — removal of the factory anti-tamper, including a clean and re-grease of the action and trigger.
• Anti-Tamper Removal & Pellet Tuning — £140 — the above, plus a tailored pellet tune to your choice with a full power report and a test target showing the accuracy achieved.
• Full Service, Anti-Tamper Removal & Tuning — £160 — a complete strip, clean and reseal, plus anti-tamper removal and the pellet tune above.
• Full Service & Tuning — £130 — the same full service and tune; only choose this if all anti-tamper has already been removed.

What's included in a full service

• Full O-ring replacement
• Internal clean, de-grease and re-grease
• Valve stem polish
• Power check and leak test

If we find any defective mechanical parts that need replacing, we will contact you first to discuss — this may incur additional cost. Please also tell us about any non-factory modifications made to the rifle.

What we need from you

• The pellets you shoot — for the most accurate tune
• Any muzzle device you use, and your single-shot tray or magazine

Turnaround

• Tuning — 3–8 working days
• Full Service — 1–3 weeks

How it works

1. Contact us to book your service.
2. Get your rifle to us — see getting your rifle to us. Collection & return delivery can be arranged at extra cost.
3. We service, tune and prepare your full power report.
4. We return your rifle to you.

Note: we will do our best to get your rifle shooting through the same hole at 30 yds, but we cannot guarantee this every time due to natural variation between barrels.

Not the right model? See all our Air Arms rifle service & tuning options.