The Air Rifles & Pistols thread
- Thread starter jamief
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http://www.ebay.co.uk/itm/161766999201?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Anyone bought a replacement piston seal from these guys on ebay? I am after a replacement seal for my Cometa. Sounds like a better product based on the description and cheaper than Chambers despite coming all the way from Australia.
Would a piston seal come under the VCR bill?
Anyone bought a replacement piston seal from these guys on ebay? I am after a replacement seal for my Cometa. Sounds like a better product based on the description and cheaper than Chambers despite coming all the way from Australia.
Would a piston seal come under the VCR bill?
Decided to have a go at 'tuning' my Cometa 300 air rifle since I had it apart to replace the piston seal. I bought a rod of black delrin a while ago from ebay, so used this as I believe it is the same material used for my venom tuned HW97. Turned a top hat for the front of the spring and a washer for the rear.
Next job is to make a steel piston liner out of an old spray paint tin. I was going to buy some 0.5mm ptfe sheet, but it's £6 and I doubt it will make enough of a difference to warrant the cost.
I have some delrin left and its the exact diameter of the compression tube, so I'm toying with the idea of adding a delrin ring around the rear of the piston. The piston is a sloppy fit so it seems like it shouldn't be too hard to achieve. I was thinking of buying a 3mm metal cutting disk for my angle grinder and making a jig that I could slowly rotate the piston and it would just cut into the piston a mm or so. Then epoxy the ring in place. Not sure if it would be more trouble than its worth...
Next job is to make a steel piston liner out of an old spray paint tin. I was going to buy some 0.5mm ptfe sheet, but it's £6 and I doubt it will make enough of a difference to warrant the cost.
I have some delrin left and its the exact diameter of the compression tube, so I'm toying with the idea of adding a delrin ring around the rear of the piston. The piston is a sloppy fit so it seems like it shouldn't be too hard to achieve. I was thinking of buying a 3mm metal cutting disk for my angle grinder and making a jig that I could slowly rotate the piston and it would just cut into the piston a mm or so. Then epoxy the ring in place. Not sure if it would be more trouble than its worth...
I bought a piston seal from the guy on Ebay and it seems to be decent. I'm not sure how he makes any profit after shipping from Australia.
Made a piston liner out of an old steel spray paint tin, which has taken some of the twang out of the spring, but it needs a tighter fitting rear guide making to finish the job. Theres a guy on the airgun bbs that makes them, so might ask him to make me one at some point.
I havent used it much as I just bought a Brummie Webley Tomahawk with a Vmach kit fitted off the bbs, so been playing with that
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I bought a piston seal from the guy on Ebay and it seems to be decent. I'm not sure how he makes any profit after shipping from Australia.
Made a piston liner out of an old steel spray paint tin, which has taken some of the twang out of the spring, but it needs a tighter fitting rear guide making to finish the job. Theres a guy on the airgun bbs that makes them, so might ask him to make me one at some point.
I havent used it much as I just bought a Brummie Webley Tomahawk with a Vmach kit fitted off the bbs, so been playing with that
Cheers for the update and nice proper tomahawk. Did you look at tw chambers or knibbs' for the part before buying off ebay? Thats where i got the parts for my wip airsporter. I really need to send my Airsporter parts off to be be blued so i can assemble and finish it
I used to use Chambers all the time before this VCR bill, so now I would have to send them my old piston seal before they will send the new one, or mess about getting it sent to a local gun shop.
Originally wanted another Longbow, but the Tomahawk I bought is short stroked and seems to have a fast lock time and the extra size and weight helps to soak up the recoil better.
Only issue is the first stage on the trigger is a little sticky. Might need a bit of grease on the sears or something.
I'll be interested to see the airsporter finished if you ever get round to sending it off
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Originally wanted another Longbow, but the Tomahawk I bought is short stroked and seems to have a fast lock time and the extra size and weight helps to soak up the recoil better.
Only issue is the first stage on the trigger is a little sticky. Might need a bit of grease on the sears or something.
I'll be interested to see the airsporter finished if you ever get round to sending it off
.I used to use Chambers all the time before this VCR bill, so now I would have to send them my old piston seal before they will send the new one, or mess about getting it sent to a local gun shop.
Originally wanted another Longbow, but the Tomahawk I bought is short stroked and seems to have a fast lock time and the extra size and weight helps to soak up the recoil better.
Only issue is the first stage on the trigger is a little sticky. Might need a bit of grease on the sears or something.
I'll be interested to see the airsporter finished if you ever get round to sending it off
o.0 i ordered a leather pistol head/seal for my Airsporter from Chambers and they just posted it.... all ordered online lol
My rifles havent progressed past the same point they were in april in this post
http://forums.overclockers.co.uk/showpost.php?p=27870495&postcount=1793
Only change is the Airsporter has been fully taken to bits now (loading tap and sights) and just needs posting to Manchester to get blued
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Got a really old break barrel spring air rifle that i used to use as a kid. dug it out while moving as i've been using my PCP one instead. Had a go with it and the shots are so inaccurate and has very poor range. Is it likely that i need to get a new spring for it? If so is it fairly easy to change?
Probably, but it could be a few other things as well. The piston washer might need replacing. The breech seal might be knackered as well. You can test this by putting a bit of talc powder on the breech and taking a shot. Both are usually easy to replace.
Best bet would be to open her up and have a look. A good clean and lube with the proper lubes could go a long way to getting it shooting better.
Well worth investing a bit of time and effort into getting it running. I wish I still had the springers I had as a kid.
The Airsporter and Meteor i have are the onew my father bought when he was a teen in the early 60's so they are keepers for me.
If the springer you have is quite old it may need servicing as Mark said but the pellets you are using might be wrong for the barrel which may explain some random accuracy.
Also you may have lost the technique and skill to shoot a springer as while i like pcps they are "easymode" airgunning and break your form for holding and firing a springer.
What calibe and make is your springer
If the springer you have is quite old it may need servicing as Mark said but the pellets you are using might be wrong for the barrel which may explain some random accuracy.
Also you may have lost the technique and skill to shoot a springer as while i like pcps they are "easymode" airgunning and break your form for holding and firing a springer.
What calibe and make is your springer
Cheers for the advise, will give it a go. It had been left out in the shed for about 8 years so wouldn't be surprised if washers and breech seals might be knackered. And tips on what lubes etc i would need? I only have experience in shooting them and not maintaining 
I did put a scope on it and noticed the pellet drop was horrific. Struggling to hit from a few meters and I'm sure i'm not that bad.
Will have a look tonight when i get back from work but i don't really even remember any markings on it. I know it's a .177 and that's about it.
It's got to be at least 30 years old as my older brother used to use it and knowing my dad it wasn't brand new when he got it. This is the only one to survive my brother dismantling them. I remember his 'parts' collection.
I did put a scope on it and noticed the pellet drop was horrific. Struggling to hit from a few meters and I'm sure i'm not that bad.
Will have a look tonight when i get back from work but i don't really even remember any markings on it. I know it's a .177 and that's about it.
It's got to be at least 30 years old as my older brother used to use it and knowing my dad it wasn't brand new when he got it. This is the only one to survive my brother dismantling them. I remember his 'parts' collection.
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Any high moly content grease should do. I think people often use CV joint grease. Or you can get a pot of Abbey LT2 moly grease like I did, a bit expensive for the small amount but it has lasted me years as you don't need a lot.
A light coating on the rear of the piston, spring and spring guide, using an old brush or your finger. Make sure not to get any in front of the piston washer.
If its a leather piston washer you can sometimes get modern synthetic piston washers to replace them with. Not 100% sure what you do with a leather washer so someone else might be bale to help with that once you have stripped it.
Im sure if you post a pic someone will be able to identify it.
A light coating on the rear of the piston, spring and spring guide, using an old brush or your finger. Make sure not to get any in front of the piston washer.
If its a leather piston washer you can sometimes get modern synthetic piston washers to replace them with. Not 100% sure what you do with a leather washer so someone else might be bale to help with that once you have stripped it.
Im sure if you post a pic someone will be able to identify it.
I can't seem to get any enjoyment out of recoilless guns 
. Have a Beretta and Walther cp88 co2 guns, but just get bored before the co2 bulb has even ran out.
It might be different with a semi target gun though. I was thinking about getting the HW40 a while back to test the waters. A HW75 would match my HW45 nicely though.
My HW45 tends to diesel really bad every few shots with sends the pellet out of the group, which is annoying. The piston seal is such a tight fit that any grease they put in the comp chamber when assembling in the factory just gets scraped up in front of the piston seal. I'm going to use a dry moly spray to see if it will help. Have also ordered some ptfe to make a piston sleeve.
. Have a Beretta and Walther cp88 co2 guns, but just get bored before the co2 bulb has even ran out. It might be different with a semi target gun though. I was thinking about getting the HW40 a while back to test the waters. A HW75 would match my HW45 nicely though
.My HW45 tends to diesel really bad every few shots with sends the pellet out of the group, which is annoying. The piston seal is such a tight fit that any grease they put in the comp chamber when assembling in the factory just gets scraped up in front of the piston seal. I'm going to use a dry moly spray to see if it will help. Have also ordered some ptfe to make a piston sleeve.
Our club has a Rohm Twinmaster that i was dying to use and was one of the members which he donated to the club when he gave up comp shooting but some **** has managed to ruin the valves and it would cost a fortune to repair which is a shame for a £600 pistol.
Edit: Side note there is an old chap about 55-60 who comes down the club and someone had sold him a SMK B2 Custom a while ago and he let me use it today. I thought the Remington Express someone brought down last year was the roughest air gun i ever used or saw but this thing is something else.
It's such a dog its crazy. At 10m, rested on the bench, with a scope he was getting 2-3 inch groups consistently. I had a crack and i couldn't get anything under 2-2.5inch groups and even then it shot where ever it wanted!!
Bearing in mind i can hit 2 inch groups or under at 30m, with iron sights, with a .38 special rested on my elbows not direct on the bench, or sub half inch groups (often keyholing) with a .22lr! (I mainly shoot air rifle springers too)
Edit: Side note there is an old chap about 55-60 who comes down the club and someone had sold him a SMK B2 Custom a while ago and he let me use it today. I thought the Remington Express someone brought down last year was the roughest air gun i ever used or saw but this thing is something else.
- Woodwork and finish is like a brown poorly polished turd.
- Metal work is rough as hell and feels cheap
- Zero adjustment on the trigger and it talks pounds upon pounds of pressure to fire it as the trigger is directly linked to the piston sear
- Kicks like a mule that's been sucking on lemons
- You can audibly hear the twang and feel and hear the vibrations from the spring when you fire it
It's such a dog its crazy. At 10m, rested on the bench, with a scope he was getting 2-3 inch groups consistently. I had a crack and i couldn't get anything under 2-2.5inch groups and even then it shot where ever it wanted!!
Bearing in mind i can hit 2 inch groups or under at 30m, with iron sights, with a .38 special rested on my elbows not direct on the bench, or sub half inch groups (often keyholing) with a .22lr! (I mainly shoot air rifle springers too)
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Just googled it and it looks very similar to the SMK B2 Custom i was talking about (Which is chinese)!
Edit: Just found out its the same damn rifle! Interested to see how yours fires compared to the pile of trash the guy at the range had.
This one i assume