GTA
PCP - HPA - C02 Gate => Crosman Discovery Forum => : Cruizer January 23, 2009, 10:59:15 AM
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I got my new TKO muzzle brake today and wow what a differance in sound levels. I'm not sure if it's effecting the fps. at all but I know I don't have the nieghbors threating to call the cops. I also suspect that it needs a second barrel band towards the muzzle since you have to remove the factory sight and support.
Cruizer
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The small brake with the sight that you removed should not have been touching the barrel . It was probably very close but there should have been clearance there . It was not a support so you should not have to add another to take its place. Marvin
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Marvin
Ok I just noticed how it was machined to fit around the resevoir. Upon close inspection it seems that with out the factory brake there appears to be somw barrel droop from the barrel band to the muzzle. I'll have to set up a target tomorrow and see if its still shooting straight.
Thanks
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Cruizer - thanks for the input on the TKO brake. I just ordered one yesterday. What size did you get? I ordered a 6.5" carbon fiber wrap. I'm trying to be pro-active with the brake to keep the neighbors happy.
I have a .22 Discovery coming from Cabela's via special order. I had some gift cards & a good coupon from Christmas, and they were quite happy to order one for me. The down side is the 3-4 week delivery time, but I'm hoping to have it now in 2 weeks or less.
I have an R7 (.177) and one of the last Birmingham Webley Stingrays (.22). I & my kids enjoy them, but I'm really looking forward to the (entry-level) world of PCP and non-hold sensitive rifles.
I live near Knoxville TN, FWIW.
Mike
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Welcome to the GTA Forums Mike !
You have found,THE BEST AIRGUN FORUM ON THE INTERNET !!!!! And, A GREAT PLACE TO BE ! ! ! !
And Now that your a member of our Airgun Addicted Family, I hope to see you here often !
I'm sure some will by shortly, with the information you have asked for, as I'm not into HPA and PCP's just yet :)
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I got the black 6.5". Man what a differance. Welcome to the forum.
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do you have a web link for TKO breaks?
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Here ya go: http://www.tko22.com/brake/index.html
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Thanks for the info, Cruizer. I look forward to getting both the brake & rifle.
I also enjoy this forum - I've picked up a lot of good information from it, and plenty of good reading over in the Hunting Gate.
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I have 2 of these for my 2 discos. They work well and do not effect the accuracy. Both Discos are quiet and can be shot all day in my backyard with no complaints. Of special note, when combined with an HDD all I hear is a "click". The effect is synergistic. I have the one without the HDD set up for power and that one is very quiet. Sounds like a staple gun. I have found that a barrel band (with o-ring) close to the brake maintains a constant alignment with the scope.
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Where do you find the barrle band at 5Thumbs?
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contact Doug W at dougwitkowski@netscape.net. Cost is $24 including shipping. He ordered some from Crosman, he takes out the set screw on the top and cuts a groove in it to fit an O-ring. This holds the barrel in place. The bottom part that goes around the air tube remains the same. Before you tigthen it down I'd cut up a piece of plastic (like a film negative) and put it under the air chamber so when you tighten the set screw it does not leave a mark on the bottom of the tube.
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Thanks bud.
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On mine, you can only hear the mechanical noise of the hammer hitting the release valve... then you hear the pellet hitting the trap. that's it.
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sssssssssssssssssshhhhhhhhhhhhh did u hear that no .thats on my qb78.22s. tko muzzle brakes r excellent before puttin it on the qbs it was loud to shoot outside so i called mike quickly and 4 days installed with the setting screws 6 1/2 15mm awsome
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just installed my TKO muzzle break on my discovery today and WOW you guys weren't kidding. night and day difference kinda like the satisfaction i got from bigcat trigger to GRTIII.
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Did you guys send your fill cap's in to be machined? Is there a way around that?
Anyone try the MB50 break?
Thanks
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Hi folks, after installing one on one of my Discos.... well I got to say it really works, I'm happy with it , the only problem that I have so far is that when I try to refill my gun the female fitting on the pump doesn't connects freely into the guns fiting it kind of touches the MB , is this normal or my barrel is too low ? or maye I pushed the MB in too much on to the barrel , does anybody has pictures on how you refill your Disco when you have a TKO instaled on it . ,
thanks .
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The barrel band designon the Discovery (and other 22xx Crosman designs) is such that when the two set-screws are tightened on the barrel band, the barrel and airtube s are squeezed together.
This has the same effect as a "drooping" barrel on a springer: You culd run out of "up" adjustment on your scope, the barrel is under a downward tension, and most important (to me!) is when a barrel extension is added (like the TKO brake) the barrel center line is angling downward and encroaches into the space needed toattach the fill adapter and fill the gun.
The solution is to either shim the barrel and airtube away from each other, or add set screws to the barrel band to separate the barrel and keep the breec h (which is the scope mounting point) and the barrel in line, and parallel to the airtube.
Shim by loosening the barrel band set screws, cutting 4 pieces from a soda can about 1/2" X 1/2" and forming 2 of them to the radius of the barrel and 2 to the radius of the airtube. Slip one or two of the shims UNDER the barrel between the barrel and baelband and one or two shims OVER the airtube between the airtube and barrel band. When in place, gently tighten the set screws. Too tight and you will undo the work you accomplished by shimming.
A much better and stronger way is to drill and tap 4 additional set-screw holes on the sides of the band ... 2 angling upward to the barrel and 2 angling downward to the airtube. This triangulates the barrel and airtube mounting and makes for a very sturdy barrel mount. It is tricky to drill the angled holes on the flat sides of the band. I use a stub mill to mill a flat for the drill bit to work on. Not sure if I can attach a pict of a drilld band but here is a try:
Pict of a drilled band on a pistol:
http://www.tko22.com/TKO_gallery/images/drilledBand2260BR.jpg
Close up of band:
http://www.tko22.com/TKO_gallery/images/drilledBand.jpg
Note the two set screws on each siide ... one angling upward and one angling downward.
With the barrel parallel to the airtube like it should be, it's easy to attach and fill the discovery.
AND I am totally convinced throough lots of testing that the drilled barrel band is the most reliable way to increase acuracy of the discovery rifle. Better than all other barrel work combined.
Have a great week!
MIke T.
p.s. Adding another barrelband that isn't shimmed or drilled makes the situation worse. For a hunting gun, I recommend 2 drilled bands for best "ruggedness".
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Thank you Mr. TK22 problem solved ,
I did exactly what your post says to both of my Discos now the refilling is a lot easier .
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Mike, you should offer these drilled band on your site :) .
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Just got my TKO Brake yesterday and installed it on my Disco this afternoon....... All I can say is...... OMG :)
Fit perfect, works fantastic and left enough room for my refill hose adaptor....
Jeff