Fx crown mk1

[villaman]

I have a crown mk1 shooting 21 gr ZAN slugs at 945 fps . What mods can be done shooting 24.5 slug or pellet at 945 fps . At the moment I can shoot them at 870 fps

 

[pesty3782]

Titanium 6.3mm Valve Seat - FX Impact Mk1, Crown Mk1, Boss and Bobcat 0.30cal

A very strong, titanium valve seat bored out to 6.3mm rather than 5.5mm. Allows better airflow and more power when needed. Also, highly unlikely to break, and much stronger than the OEM Stainless Steel Valve Seat. Great addition for any power tune. Can possibly add up to 40 FPS, based on...

910airguntuningandrepairsllc.com

I put this valve seat in my MKI…I shoot the 22 cal H&N 21 grain slugs out of my 380mm barrel right at 880 FPS….my reg is at 140 and the hammer spring isn’t maxed out at all…..

Tony P

 

[villaman]

Doesn’t look like they will send to UK