Opinions on barrel adapters?

[Señor Leo]

I just picked up a Tippmann TMC which is 98 custom barrel threaded. About 98% of my other markers are cocker threaded so I've considered getting a thread adapter for the TMC. I plan to use a barrel with inserts on the TMC(either my freak barrel or my techt iFit kit). Would the barrel adapter create any issues?

[Number six]

I use a PTP Sniper that I bought an Ion-threaded Sharktooth kit for. The Lapco adapter that makes it work hasn't given me any issues at all.

[Toestr]

I don't know if you will have any actual *issues*, but the thread adapter will cause the barrel kit ahead of it to be pointless, unless you plan to also get a whole set of adapters in various bore sizes.

Also bore kits made for tippmanns don't work the greatest unless you modify the bolt and/or barrel threads.

Sent from my Pixel 4a using Tapatalk

[Myrkul]

Really depends on your paint. My old field I was able to use barrel adapters with no problems. My current field just looking at one is chop city. (We have stupid picky paint though). So It really depends on your paint.

Regarding the bore kit... just don't. Not for a Tippmann. The front bolt on their inline blowbacks is too large and gets stuck in anything smaller then a .685.

Just go on eBay and pick up a used J&J and call it good.

If you want to burn money I love lapco big shots on my tippman's as well.

[Spider!]

Fundamentally, with barrel parts and adapters, always keep the bore constant or increasing in diameter as it goes from breech to muzzle. That's assuming you start with a diameter that works with your bolt.

You should also take a look inside the complete barrel from the breech end to be sure there are no partial shoulders. If a part is not concentric in the bore it can leave a partial shoulder facing the ball, which is just a cheese grater for paint. Some old sets are off, but they were within the next bore diameter of the set, so no real problem when kept together.

You can make a Frankenstein barrel that way. It may not be so easy to clean though.

[Chuck E Ducky]

Detents work fairly well on the TMC I would just look for a .685ish 98 barrel you like you can find them dirt cheap. I might have a J&J I purchased for like $10 because I thought it was a cocker threaded. I forget the 98 kind of looks like cocker thread right? Or is it corse like the x7’s I forget. If it fits what you got you can have it for shipping. I’m pretty sure the J&J I got is 98 threaded.

edit: initial search I didn’t find it I know I got it somewhere. I did find a an old teardrop barrel but I think this is smart parts threaded.

[Toestr]

Detents work fairly well on the TMC I would just look for a .685ish 98 barrel you like you can find them dirt cheap. I might have a J&J I purchased for like $10 because I thought it was a cocker threaded. I forget the 98 kind of looks like cocker thread right? Or is it corse like the x7’s I forget. If it fits what you got you can have it for shipping. I’m pretty sure the J&J I got is 98 threaded.

98 threads are coarse. A5/x7 threads are fine, and have a shorter shank.

Sent from my Pixel 4a using Tapatalk

[Chuck E Ducky]

Oh ok I always get them confused. Sorry I think the one I got is for the A5/X7.

If I find it I will take a picture but I don’t think it will work for you.

[apamburn]

I exclusively use a barrel adapter on my 98s so that I can use my cocker threaded J&J Edge kit on them. I have had no problems whatsoever. My adapter is very tight fitting; plan on removing your front bolt o ring if you haven't already.

I don't know if you will have any actual *issues*, but the thread adapter will cause the barrel kit ahead of it to be pointless, unless you plan to also get a whole set of adapters in various bore sizes.

Why do you say that? Doesn't make sense to me nor has this been my experience.

[Toestr]

I exclusively use a barrel adapter on my 98s so that I can use my cocker threaded J&J Edge kit on them. I have had no problems whatsoever. My adapter is very tight fitting; plan on removing your front bolt o ring if you haven't already.



Why do you say that? Doesn't make sense to me nor has this been my experience.

Maybe not pointless, but definitely less effective. If you have an adapter with a larger bore than the barrel in front of it, you're going to have air go around the ball. Also if you're underboring the barrel kit, you'll just be slowing down the ball while it's in the barrel.



Sent from my Pixel 4a using Tapatalk

[Trbo323]

Yeah I agree with toestr there

Also whoever said get a J&J

The J&J is going to be very close to the price of an adaptor, they are great barrels for the money (I think they are under rated) and a barrel kit, adaptor or no doesn't do much on a tippmann blowback

The way the valve is set up your are using the same amount of air for each shot (within an extremely small margin) regardless of your velocity so you won't be saving any are by going to a barrel kit

Accuracy, can be helped to a degree but as mentioned above, you can't go too small or the bolt can have problems. Also, if you go too small you can end up chopping paint as the breaches are somewhere around .7 and let's say you are running a .679 insert for today's small paint, that leaves a fairly large step for the paint to hit and get up into the barrel. Doesn't always go well.

Hey a j&j 685 or larger and call it a day

Sent from my Moto Z (2) using Tapatalk

[apamburn]

Maybe not pointless, but definitely less effective. If you have an adapter with a larger bore than the barrel in front of it, you're going to have air go around the ball.

To be honest the adapter I have is pretty damn small bore. My 98 bolt wouldn't fit inside with an o ring on it. Not sure even my smallest insert is that tight.

And even if not the case I have trouble believing the fraction of a second where air escapes around the ball before it hits the smaller control bore actually has a significant impact on velocity or efficiency

Also if you're underboring the barrel kit, you'll just be slowing down the ball while it's in the barrel.

I don't believe that is true based on my experience and punkworks testing. In general, smaller bore leads to increased efficiency and velocity, obviously that's only true to a certain barrel length.

[Trbo323]

I don't believe that is true based on my experience and punkworks testing. In general, smaller bore leads to increased efficiency and velocity, obviously that's only true to a certain barrel length.

Not for tippmann blowbacks though (efficiency anyway)

To see an increase in efficiency you need to either use a smaller volume of air or use the same volume at a lower pressure. The flow control on a tippmann does neither, it simply restricts the flow of air down the barrel and any air that is not used to propel the paintball is just dumped out after the ball has gotten past the porting

This is also why, if you put a longer barrel on a tippmann it's possible to create a situation where it will not shoot below 300 (had it happen a handful of times)

In most markers, you put a longer barrel on and then either adjust the regulator down or the spring pressure.

One of the best efficiency upgrades for a tippmann is a RVA because then you are actually changing the amount of air that comes through the valve

Sent from my Moto Z (2) using Tapatalk

[Señor Leo]

One of the best efficiency upgrades for a tippmann is a RVA because then you are actually changing the amount of air that comes through the valve

What is an RVA, when I searched all I could find is "Rear velocity adjuster"

[Toestr]

What is an RVA, when I searched all I could find is "Rear velocity adjuster"

RVA is a rear velocity adjuster.

Sent from my Pixel 4a using Tapatalk

[Toestr]

To be honest the adapter I have is pretty damn small bore. My 98 bolt wouldn't fit inside with an o ring on it. Not sure even my smallest insert is that tight.

And even if not the case I have trouble believing the fraction of a second where air escapes around the ball before it hits the smaller control bore actually has a significant impact on velocity or efficiency




I don't believe that is true based on my experience and punkworks testing. In general, smaller bore leads to increased efficiency and velocity, obviously that's only true to a certain barrel length.

Yes underboring will provide better efficiency, assuming the ball is sitting in the underbored part of the barrel when hit by the power pulse. If it's sitting in an oversized adapter, it will have air rushing around it then run into increased friction in the underbored part.

Sent from my Pixel 4a using Tapatalk