'BSA' Springs--Check out those specs, and use a little imagination. You don't need to have a BSA rifle to use these springs, from up-power to softer-power tunes.

GRT Mainspring and Kit for RWS guns---Those old concerns about keeping your RWS's velocity close to the factory velocity, are over. And, the smooth firing cycle of this generously-preloaded spring, fools you into thinking it's shooting slower than it is. This spring is a multi-fit in several models, like for softer tunes in too-harsh-for-you guns.

Univeral Firewire--The small size, plus room for various spacing set-ups, allows it to fit many applications. And, the ID is almost ideal for many factory guides.

R1/HW-80 Soft Spring and Kit---Have an R1, and still want that nice R1 velocity, but with better comfort and no twang? Or, have any other larger-piston magnums that just kick your butt (or shoulder) a little too hard? The kit is pre-done everything for you if you have an R1, and it can be used for other guns if you know how to add a little spacing--often even better if you can make a spring guide. (Why was this spring in the dark for so long? Only the mega-mega power demands explain that. This kit WON'T turn your R1 into the slower-shooting R9--the power is still right up there).

New GSI---Very simply THE solution if you're tired of the brittle factory springs, and you want the cheapest way to get rid of the twang too. You can use the factory guide. It's not as ideal as getting the GRT kit, but it's a close 'champagne' second-choice, on a beer budget.

Tarantula XL-FP Kit Spring and Kit for R9, R10---Yes, it's an oldie, but too good to not mention. The spring can be used in other guns, and the entire kit fits the Marksman 70 series rifles---there were a bunch of the M70's sold as close-outs on Airgun Express a few years back, and yes you have some Maccari tuning options for them.

........the Global Tarantula XL Small. A very versatile spring with a set length the same as the larger Tarantula, GSI, and many other 108 mm set springs. A fantastic spring in the Diana 27, BSA Airsporter and many others.

Monolith Spring and Kit for RWS Sidelever Guns---These are the spring and kit that allow you to increase the power of your RWS sidelever guns. That may be a big concern if you hunt, or want to maximize the power of your RWS 48 in .25 caliber. Just to make sure you know, after a two-year absence, it was put back on the site's list of choices again. The spring fits several other guns too.

HW-77/97 Kits---If you have the older style HW 77, rated at 830 FPS, did you know you can usually increase its velocity to the newer specs, WITHOUT changing your piston, seal, and compression chamber?? The Hornet HW77-97 Full Power Kit will do it, and you still retain a gentle firing cycle. That's because the rifle was under-sprung from the factory. Universal Options: If you buy the HW77-97 FT Kit--Old and New, you can set it up for FT velocity by not using one or both of the supplied spacers. But, add both spacers, and you get full power in othewise good guns.

With either of these kits in the old HW-77 (setting the FT Kit up for full power), you typically get about the same velocity as the current factory HW-77/97. (Like JM says, regularly check to make sure the breech seal in these guns is good, or NO kit will give you good velocity and firing cycles--they leak air. The newer, translucent breech seals are a little tougher than the old, opaque white ones, but you should still check).

Just a few notes:

If you're using any spring without a front guide, consider dropping a lubed Grade 8 washer into the piston first. It helps de-torque the spring. That information used to be listed on JM's site, when he had more text there.