Piston for MK2 BSA Airsporter all cleaned up

This was a total strip down on this air rifle.

[@davidallen7540]

I drilled my piston and run it on plastic studs to eliminate metal to metal contact like TX etc. As well as spring and piston sleaves/guides I have thin wahers either end of spring to allow it rotate. Opened up and reemed transfer port. Runs smooth, very low recoil with max variation of 8 fps. 11.3 foot pounds.

[@airgunmaintenance429]

Nice man

[@DesiGardening]

Very good job sir.👍 i have same gun i want to restore it to.helpful video

[@charlietango186]

Shoaib Muhmmad If there is anything you may need help with, please feel free to contact me, anytime. atb Ray

[@612morrison]

Believe it or not but that old spring was straighter than the one I took out of my airsporter mk6

[@andhe.andhe.lumutz]

I have a BSA MK2 with a cone-shaped piston. Here I am having problems installing the valve. Can you help tell me how to remove the cone on the end of the piston? thanks

[@carlowen6418]

how do you remove the loading tap i need to take it off as the piston head has come off in side thanke

[@dennis1802]

I recently saw i vid on youtube of some one changing a barrel on a HW airgun. He removed the breach for that! Maybe you can find it, try look barrel swap for hw airgun? Hope it helps good luck

[@Buckbury]

The piston is from a Mk 4 or later Airsporter or a Mercury.

[@henryToped]

So the pointed piston is from earlier mk1 and mk2? Do you know what's the purpose as opposed to flat piston head?

[@henryToped]

Do you think increasing the piston stroke by reducing the washer is ideal for Airsporter? Thanks

[@Buckbury]

The conical piston head was introduced from 1950 on the basis of efficiency and ensuring minimum rebound. It was replaced with the system shown in the video on models from 1965 in line with a move to new production facilities and to simplify manufacturing and save costs. The new piston head was initially made of nylon but proved to become unstable after long term usage as did a number of other components produced in plastics from this time. From the 1980’s in an attempt to achieve more power the Airsporter and Mercury S models were introduced with the reduced height piston head resulting in greater air cylinder swept volume and hence more velocity. This piston head giving increased power, may be fitted to the earlier models but may require some modification to the retaining stud. However you must ensure that any modification does not result in taking the air rifle muzzle energy over the legal limit of 12ft/lb.

[@henryToped]

@@Buckbury It makes sense to me now why many said the earlier versions are a real catch. No worries I'm outside UK. And big thanks for such an educating explanation. Happy new year to you.

[@notwocdivad]

I always understood the mk 1, 2 and 3 Airsporter piston heads were conical in shape? this one, obviously, is flat.

[@charlietango186]

This gun is in fact a BSA Airsporter "S"

[@shortychapman6759]

Whats the best way to fit the breech plug back in my mk6 airsporter please?

[@theandybchannel.1819]

About to undertake a tune up of my mates MK1, any advice?

[@kirbyparkwest4392]

Nice. I've got an BSA Airsporter S. Where did you get the spare parts from?

[@charlietango1635]

The customer supplied them when he bought it to me

[@TheBrabs007]

It’s an airsporter s not a mk2

[@mahmoudjawa]

ماشاء الله تبارك الله

[@clivebutland3008]

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