Air Rifle Advice Please

This is my deceased father's air rifle.. donkeys years old and originally from former Czechoslovakia.

The problem is that the trigger will slip unpredictably from the cocked position and obviously that's unsafe and unusable.

I'm guessing that it's worn and needs a bit of a notch or greater angle filing/grinding behind the point that holds against the round block on the spring (whatever that's called). And it's pretty hard material making little impression with a small round needle file in situ. So again I'm guessing it's goimg to need the rivet drilling out to take the trigger unit off for access.

But I'd appreciate the opinion of folk into such things before 'winging' it..

Is that by any chance a Relum Tornado?

If it is, I may be able to help.

The rounded off bit on the trigger that holds the piston cocked is the sear. It can be worked on to give a more positive safe lock when cocked but usually needs a bit of experience to make it a safe useable progressive firer, What make is it ? because there's a surprising amount of spares for loads of older rifles about and you might find a replacement trigger unit is readily available which would save a lot of hassle.

Didn't think a Tornado had a rounded end cap and is Hungarian not Czech.

I'm unaware of any makers name on this. There is a long serial number below which is a tiny indeciferable symbol scratched in - possibly a makers mark? I'll look more closely at the parts for soemthign but i think it was just a cheapy even back then.

Any further advice on hw to fettel this appreciated..

2nd piccy down take a file to the sear that's holding the piston back on that edge and polish up. Can see a slight radius.

When its cocked you want the angle a tad over 90 degrees so will be undercutting. Check the return spring as well. If too hard reduce the angle.

Fairly sure its Hungarian though CZ/Brno use similar primitive triggers on centrefires.

If you mean the beak tip of the trigger then filing that was my first thought. But the metal is pretty tough and i don't think I can do a neat job in situ; there's no way to mount it all and be able to lean on it nicely. I had thought of filing out the rivet it pivots on and removig the trigger to reface it on the side of my wet grinder, pop in a temporary bolt where the rivet was for testing etc and the replace rivet when correct?

If I push the trigger against the cockign mechanism then it holds.. so the other thought was that the tiny return spring at the back of the trigger might be a bit weak but I do realsie that a tough or sticky release will affect usage.

Bear wth my while I think about this and get my better camera out. I just mounted my new mill on it's stand yesterday and want to get the packing grease and stuff cleaned off it, shift the engine crane out of the shed and tidy up the installation messes...

• Diamond coated needle files are very effective, and [these days] readily available cheaply.
• A final polish with a 'Diamond Hone' should remove any filing marks.
• Obviously better avoid trying to do the job in situ.

MichaelG.

I don't know much about guns

I am not over keen on Elfins

I do however wonder a bit about bodging up a currently lethal fire arm.

Surely (Wisely?) either good condition spare parts correctly fitted or dispose of safely .

Angle grinder in to bits or a pressie for local constabulary.

john

I'm reluctant to offer advice on guns , even just an air-rifle, but- it looks as if the sear bit, on the trigger is detachable. Why not take it of and clean up, or make a new one from gauge plate ? If it was mine I would try file, as said a diamond file is good for this.

If the sear is worn, the piston engagement is probably worn too.

Whether it is worth rectifying from a time/financial point of view is another matter.

A few points from the comments:

Yes, it's probably a cheap and crappy air rifle.. It's not a 12 guage etc and I happen to have my own 50+ acres of land so no-one else will be affected. Yes I could save time and hassle if I really wanted a smart air rifle and go buy a modern nice flash thingy with scopes etc. or since I have a farm I could likely have a word with Mr Plod and get a license for something much more lethal. None of that s the point. It was my Dad's and I'd iike to have a go at getting it working safely.. And then perhaps shoot a tin-full of pellets at a piece of paper before getting bored and putting it away.....

Now this looks more fun:

As a user of (amongst others) modern flashy air rifles, granted there's less time involved in buying it - probably goes for most of the things displayed on this forum... Sentimental value is priceless.

If it weren't for the legal hoops to jump through, I'd love to build a traditional shotgun from (as near as I could) scratch - doubt it'd be easy to sort the paperwork.

Idont know how I mssed the makers name before.. It's a Slavia 620. I must just have had my hand over than bit Doh!

https://www.google.co.uk/search?q=Slavia+620+site:www.airgunbbs.com

Chambers seem to do spares for everything *but* the 620...

https://www.gunspares.co.uk/categories/24058/Slavia/

Edited By Peter Bond on 17/01/2015 17:27:07

The sears are not that hard on these and CZ's, easy to file in relation to pivot point arc. No need for a diamond which wont leave file marks that's for hard stuff also no need to take top sear out, l leave it in 2 min job.

Plenty to hold on to in a decent vice just look what your doing, work clean and try often.

Fairly easy Peter if doing for yourself only, just need a section 2 which they pretty much cant refuse. Known convicted drugs dealers serve time and be granted a licence within 3 weeks. If doing an English from scratch 'done right' expect 11 months full time when know what your doing.

It's done.

The 'rivet' turned out not to be.. I gave it a modest tap with a drift and it's just a press fit from one side to the tight side. Some careful filing and it's staying cocked albeit the pull to discharge if anythign is a bit heavy..but that's the safe side and its hard to make a real judgement for this amateur without replacing the stock.. and some screws have gone missing so I need to dig about in my assortments to find some. At least they're standard metric threads so easy to source if I'm out of stock for that size (i had some that were too short)

Thanks for all the help guys.

pgk

Glad it was what I said it was no porkies involved.

When people take primitive triggers as on shotties to be lightened or hardened, that's all they do alter the angle.

As regards filing hard stuff, sears, springs, hammers etc are hardened and 'have to' be timed which means filed up within 1/2 thou or less, some are really critical. Nothing like taking a hammer with customer standing over you to his brand new £95k Purdey.

Hmm... I'd need to improve my scrollwork as well if I were to go down that route. Mind you, I've got a sword I need to fabricate furniture for still and that's been languishing for a few years.