FX Impact M3 & M4 air rifle quick tune lock nut ring – NEWEST IMPROVED DESIGN

This is a custom made part to replace the adjuster with a locking type which stops movement of the hammer spring adjustment thumb wheel (from the quick tune system)- this stops accidental movement of the power wheel and also helps lock it in place/stop slight creep. With the lock fitted you are still able to turn the main power wheel, but you are unable to adjust the quick tune part using the thumb wheel without undoing the grub screw lock first. This is a must if fitting to a sub 12ftlb rifle to ensure things are kept legal.

Laser-engraved notches on both the top and bottom provide a clear reference for hammer spring settings when viewed from the side of the rifle. Adjustment range is shown in the product images.

The lock does limit your hammer spring adjustment slightly, max adjustments are shown in the photo.

Its made from aluminium and anodised in black. Made in the UK by Sub 12 airgunners.

Included Hardware:

• Slim Headed Bolt – Replacement for the factory bolt, which may be damaged or burred during removal due to tight factory torque.

• Standard M3 Flat Bottom Grub Screw (Black) – Uses a 1.5mm hex drive with a flat tip to reduce damage to the threaded rod. May mark threads but provides firm locking.

Installation video below

TORX and nylon tipped grub screws shown in the video are not currently included in this current batch. We will be getting them again with these screws but at the moment no lead time.