What is THE best PCP Add-on you've purchased?

So I just purchased a new hex set for myself for Christmas (MIP-Thorpe and Bondhus) which have been fabulous. That got me to thinking - what are the greatest Add-ons you purchased for your PCP? Donny FL Moderator/Bipod/sling/trick scope mounts/compressor etc? My top three would have to be:

1- Patch worm pocket field kit w/ Ballistol - never used this until pcp's. Has helped tremendously to maintain accuracy and makes cleaning the gun a breeze

2- Donny FL Sumo moderator - the day I replaced my stock FX Impact moderator with this my group size cut in half - I don't know if that was just me or if that happens to others, but it was dramatic none the less. Not sure if that's because it does such a good job of stripping the turbulent air around the crown of the barrel or what, but I like the results.

3- FFP scope - I don't want to start a debate here - just to say holy crap this is so much easier than SFP that I've used for 30+ years. Especially with the windage and drop that we deal with in airguns.

How about you? I'm sure there are lots of folks looking for Christmas gifts - this could be a good list starter.

-- Doc
 
It’s rather difficult to select THE best add on for me. But I have several on my KG Cricket that are great each in it’s own right. In no particular order:

UNF moderator adapter, without I can’t install my...

Sumo moderator, the gun is pretty quiet, but the Sumo takes it down to another level. 

Atlas rail under stock, without it I can’t install my...

Atlas Bipod. This is a very solid piece of kit!

Donny FL side plate, just makes things a bot easier to load the mag.

Sightron 4-20x50 scope, very sharp, high quality scope. 

Also have a Side-shot, but I don’t use it much. 






 
BeemanR7...great deal on the weaver tactical.

You aren't kidding, sonny! Actually, I got that scope for an even better price than currently listed; only $433 shipped! By far the best glass I've ever had. Edge to edge clarity is amazing at all magnifications. Light transmission becomes stunningly apparent at dusk. For equivalent glass in any other scope available, I'd have had to spend over $800. I count myself very fortunate and my thanks goes to JWR for his recommendation of it. That scope is still a steal at the current list price. The only hitch is that minimum focus distance is listed at 25 yards. I haven't actually tested to see if it can focus closer. But on my Impact .25, 25 yards is all I need. For anything closer, the Impact is too much gun unless I'm shooting a coyote. In that case, it doesn't need to focus closer. 

Cheers,

BeemanR7
 
The hands down best by a country mile add-on for an FX Impact is the Side-Shot magazine. Holy crap is it nice!!! I can personally attest that there's no undo hype about this magazine. It's all that and a bag-o-chips. Quick and easy to load. Impossible to jam unless I do something REALLY stupid. Spring tension pre-load is perfect and never damages the pellet skirts. It's tough as nails. Feeds flawlessly. Advances immediately. Cycles smoother than a spanked baby's behind. It's everything that a magazine should be. The only thing that's bad about it is that I'm not the one who designed it. DAMN!!!

In case anybody questions my over enthusiasm about it, this is NOT a paid endorsement. As a matter of fact, this magazine came already installed on my second-hand Impact. So I can't even credit myself for buying it, or putting it on my gun. 

Side-Shot magazine........GIIIIIIIIITT IIIIIIIIITTT ....!!!!
 
Benjamin Traveler pump. Operation via battery or commercial power has made refilling a breeze at home, range, and field. Makes me want to shoot more.

At the risk of distracting this thread, can you comment on your experience with this pump? Would you recommend it to someone (me) who has zero technical skills,knows nothing about fixing/ modifying HPA fixtures and would like to fill pcp tanks ( typically 150-300 cc) from 1500-3000 psi an average six or seven times a week? Any maintenance issues? 

Thanks in advance for any comments.