Genuine FX Slug Power Kit for the Impact M3 and M4 (art 20340): hammer-weight spacers and a lighter valve return spring to raise velocity with slugs and heavy projectiles, plus a .22 pin probe and .25 sleeve.
$109.00
Available on back-order
The FX Slug Power Kit brings a few key modifications to the FX Impact to maximise its power and accuracy potential with slugs and other heavy projectiles. Two hammer weight spacers sit in front of the return spring on the hammer weight guide, allowing more compression on the hammer spring and adding weight to the hammer; a lighter valve return spring works with that to open the valve further. The Impact M3–M4 kit (art 20340) also includes a .22 calibre pin probe and a sleeve for .25 calibre conversion.
Which Impact does this fit?
The Impact M3 and M4. FX lists separate Slug Power Kits for the Panthera/Dynamic/King/DRS (21056), Crown (20668), Maverick/Wildcat MkIII (20396) and Dreamline (20714).
Do I still need a slug liner?
For best results with slugs FX pairs the power kit with a Superior Slug liner; the kit itself changes hammer and valve behaviour only.
Is it hard to fit?
It is a simple kit of spacers and a spring, but it changes the rifle’s tune — re-tune and chronograph after fitting.
Specifications from FX Airguns (fxairguns.com). Australian importer: SJS Trading Co (fxairguns.com.au).
Sold and supported by 3 Gun Tactical, Licensed Firearms Dealer 50001578, Tingalpa QLD. Check fitment against your exact FX model and generation before ordering.
The FX Slug Power Kit brings a few key modifications to the FX Impact to maximise its power and accuracy potential with slugs and other heavy projectiles. Two hammer weight spacers sit in front of the return spring on the hammer weight guide, allowing more compression on the hammer spring and adding weight to the hammer; a lighter valve return spring works with that to open the valve further. The Impact M3–M4 kit (art 20340) also includes a .22 calibre pin probe and a sleeve for .25 calibre conversion.
Which Impact does this fit?
The Impact M3 and M4. FX lists separate Slug Power Kits for the Panthera/Dynamic/King/DRS (21056), Crown (20668), Maverick/Wildcat MkIII (20396) and Dreamline (20714).
Do I still need a slug liner?
For best results with slugs FX pairs the power kit with a Superior Slug liner; the kit itself changes hammer and valve behaviour only.
Is it hard to fit?
It is a simple kit of spacers and a spring, but it changes the rifle’s tune — re-tune and chronograph after fitting.
Specifications from FX Airguns (fxairguns.com). Australian importer: SJS Trading Co (fxairguns.com.au).
Sold and supported by 3 Gun Tactical, Licensed Firearms Dealer 50001578, Tingalpa QLD. Check fitment against your exact FX model and generation before ordering.
| Brand | FX Airguns |
|---|---|
| Model | Slug Power Kit – Impact M3/M4 |
| Art no | 20340 |
| Fits | FX Impact M3, Impact M4 |
| Contents | 2 x hammer weight spacers, lighter valve return spring, .22 pin probe, .25 sleeve |
| Purpose | Higher velocity with slugs and heavy projectiles |
| Country of origin | Sweden |
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