Under a thread title of 'springer or piston"
I am researching for a good air rifle for hiking and kayaking ...
Here are top priorities.
Reliable
Rugged
Powerful enough for rabbit sized game (.22)
Iron sights
Capable of minute of squirrel.
Would like.
Shortest possible over all length.
Reasonable weight (less than 5lbs)
Take down ability
Let's look at this logically:
Steel is heavier than air. Advantage: pumper [not "piston" They're called pumpers.]
Spring-piston ["springers"] air guns favor [almost require] lighter pellets. Pumpers can effectively utilize heavier pellets. Hunting needs favor heavier pellets. Advantage: pumper
Reliability: it's a wash. Advantage: both/neither.
Accuracy: Ammunition dependent. Take your time on testing & be willing to $pend your money on the right pellet for your air gun. Advantage: neither
Iron sights: Find something w/ a 11mm or 3/8" dovetail rail so you can choose from among many aftermarket airgun or rimfire sight options. Most mass-market airguns & rimfires come with what can at best be described as "basic" open sights, but a decent peep sight w/ repeatable settings can be had for <$60. Advantage: everyone
Take down ability: This is the kicker. Since we've already pretty much eliminated springers, I'll come right out & say it: about the only airgun I'm aware of that really satisfies your criteria are the Crosman 1322 pistol w/ their detachable rifle stock, or the "Bugout Kit" 1389 [recently reintroduced in the past year after being OOP for a few years.]
Save yourself the hassle of cobbling together your own kit & just look for the 1389 Bugout kit [I got one last summer on special from Academy Sports, but I'm sure you can find several sources at this time of year, altho' it's too late to get one under the tree for Christmas by now, I should think...]
The Crosman 13xx/22xx series of guns have a couple of decades worth of modding & aftermarket support for them, so you can customize them almost as much as a Ruger 10/22. The difference btw the 13xx and the 22xx series is that the former are pumpers and the latter are CO2-driven, but they share a lot of parts commonality, such as stocks, receivers, barrels, sights, etc.
Crosman makes a steel receiver [standard equipment is plastic, to keep the original purchase price down] that has dovetail grooves and a flat mount for their accessory sights as well, but there are plenty of aftermarket vendors offering more of the same, to the tune of receivers alone costing more than the complete original gun. Do your research: it's entirely possible to BYO out of purely aftermarket accessories, if you wanted to go that route.
But for your needs, the 1389BK should satisfy your requirements out of the box, with the options to upgrade the receiver, sights and barrel length [1389s before they went OOP came w/ 14" barrels; the re-released models come w/ 12" barrels to keep the power down so they can be sold in Canuckistan w/o requiring licensing. Gas-driven airguns typically benefit from longer barrels (greater expansion ratio) so an 18" barrel might be in your future if you want more power.]
Best of luck in your decision, but as Pig Buttons pointed out, it seems that Crosman has already targeted the requirements of your particular market segment. :bthumb: