Air Arms S510 Ultimate Sporter or is it? 

Iv got s510 ultimate sporter R it's much better fill to 250 bar can shoot down to 100 bar no drop off and it's tho most accurate riffle iv had I love it brilliant for hunting. Iv never took it below 100 bar

Do you know which is better/more silent,the standard Air Arms silencer or their "Q tech" silencer ?

Its not the "ultimate sporter"....its just the 510 carbine!

The 400 series are to me the best looking PCP rifles. Full stock and no air bottle to hold in your hand.

Good review , probably needed to try a few different pellets through it , the Ultimate sporter is a cracking rifle , when I bought mine it was a choice between the US & the HFT500 , and as I do a fair amount of garden target shooting I went for the US as it was a lot more quiet ... not pellet fussy to be fair , but it has its preferences and apart from the adjustability of the stock , not any difference from the S510 .. , well none that I've noticed anyway , oh , the magazine cover is a smoke black color , and the S510 is yellow ... Btw , the only thing that gets on my T**s is the metalwork really shows up fingerprints , you need to wipe down with an oily rag after every shooting session unless you wear latex gloves ( the surgical type ) ...

whenever i watch revues of anything costing heaps. i always think of the humble aa s400 after all AA have had massive wins in ft and hft im pleased to own mine because of this and the fact they are made in the uk [s200 not?] and they are good on spare parts direct from them as well

Perhaps it’s not you at fault? Perhaps testing a new pellet as your goto test ammo? I ditched jsb/rebrands as the QC was terrible and switched to QYS,RWS Superfield,H&N barracuda ft and Bisley LRG. These are now my standard pellet choice( the huntsman mk2 loves all of them).

I love the traditional stock.

A good, honest and down to earth review. Look forward to your next one 😁

Another great review mate keep them coming 👍