Improving the reliability of the Arrow JT-21M

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Improving the reliability of the Arrow JT-21M

Post by Sa-tevp on 12/28/2014, 6:52 pm

I'm getting a lot of alibi's with my critical piece of bullseye gear, so I'm writing to ask the community what they like to do to keep their gun accurate and reliable.

Ammo is the manufacturer's, and always shoots to call when it fires, right where I aim them on the repair center at either 50 or 25 yards. I use the trick of marking the last six or so red to see on the target or in the magazine window when I'm about to run out. (tracers on the end of a belt?) While the trigger pull is acceptable, I think the problem is in the magazine.

Any gunsmithing or lubrication secrets anyone wants to share?

P.S. mr alexander about a third of the way down is still my hero on this thread: http://www.targettalk.org/viewtopic.php?t=37164
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Re: Improving the reliability of the Arrow JT-21M

Post by Deerspy on 12/28/2014, 8:14 pm

yep I have one just put some gun oil on about once a year mine is at least 30 years old.

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Re: Improving the reliability of the Arrow JT-21M

Post by LenV on 12/28/2014, 9:12 pm

Go with the longer ammo. The shorter stuff turns over or does weird things in the feed.
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Re: Improving the reliability of the Arrow JT-21M

Post by Schaumannk on 12/28/2014, 9:43 pm

OldMaster64 wrote:Go with the longer ammo. The shorter stuff turns over or does weird things in the feed.
I have never had a problem with mine....   This may be why.    I don't use the short stuff.

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Re: Improving the reliability of the Arrow JT-21M

Post by GrumpyOldMan on 1/1/2015, 1:36 pm

Just the usual check the follower and feed track for burrs and sticky gunk that sometimes gets dragged in.

THEN check the final feed position--the metal surrounding the one about to be fired can get dinged or even bent. I have seen this most often on Saturday Night Specials intended for very skinny wire projectiles, usually off-brands.

The crown can also pick up burrs from being dropped.

Finally, check the launch piston. A little bent screws things up royally. A projectile that gets jammed between it and its operating channel can leave a scratch than impedes proper function.

A business card trimmed to fit can be dragged through various parts of the mechanism, first dry and another one or more as needed with a trace of lube.

A drop of oil every year on the hinge points is not so much for function but to minimize wear.

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Re: Improving the reliability of the Arrow JT-21M

Post by GrumpyOldMan on 1/1/2015, 1:43 pm

Just followed your link.

Thank you. Mr. Alexander's 13 points of analysis are all spot-on AND well-written!

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Re: Improving the reliability of the Arrow JT-21M

Post by Sa-tevp on 1/1/2015, 5:01 pm

Yep, the feed track was covered with burrs and full of gunk. Cleaned and polished and so far working good with 8mm OAL loads.

I still need to check again what GrumpyOldMan pointed out so that it performs to BE standards. A lot of good suggestions.
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Re: Improving the reliability of the Arrow JT-21M

Post by GrumpyOldMan on 1/1/2015, 5:20 pm

Nothin' like a fluff 'n buff...especially when that starts with a de-gunk 'n junk.

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Re: Improving the reliability of the Arrow JT-21M

Post by Guest on 1/1/2015, 6:31 pm

Not directly related, but I keep extra staples on my clip board for when I forget.

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Re: Improving the reliability of the Arrow JT-21M

Post by Sa-tevp on 1/1/2015, 7:02 pm

GrumpyOldMan wrote:Nothin' like a fluff 'n buff...

There is a certain similarity between the JT-21M and some consumer grade firearms currently being manufactured...
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Re: Improving the reliability of the Arrow JT-21M

Post by DavidR on 1/2/2015, 11:16 am

dump the old metal stapler and go to hobby lobby and get their staple gun, 9.95, lighter,works perfect and shoots the j21 staples.
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Re: Improving the reliability of the Arrow JT-21M

Post by Dave C. on 1/2/2015, 7:00 pm

Just about 30 yrs ago I was ask by a family member what I needed for a shooting X-mass gift.
As I was using an arrow T-50 at the time I said a JT-21 stappler.  Well I ended up with 4 of them!
I still have two unopened and the one I am using.  The first one just plain wore out.

Dave C.
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Re: Improving the reliability of the Arrow JT-21M

Post by Sa-tevp on 1/2/2015, 8:17 pm

DavidR wrote:dump the old metal stapler and go to hobby lobby and get their staple gun, 9.95, lighter,works perfect and shoots the j21 staples.

A Tupperware stapler in Bullseye? Next you'll be telling me they work underwater and all the fast operators use them.
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Re: Improving the reliability of the Arrow JT-21M

Post by DavidR on 1/3/2015, 9:50 am

Sa-tevp wrote:
DavidR wrote:dump the old metal stapler and go to hobby lobby and get their staple gun, 9.95, lighter,works perfect and shoots the j21 staples.

A Tupperware stapler in Bullseye? Next you'll be telling me they work underwater and all the fast operators use them.

All the good shooters use them, lighter and less alibies it will also improve your scores by impaling the staple at just the right angle to avoid the dreaded staple glare during times of extreme sunlight while not disappearing in low light and with its superior target stapling abilities, your targets will look better and it makes the X ring almost look enlarged which will aid in better shots. Im surprised they can even offer this fine piece of equipment for under a hundred dollars but I hear their is a government subsidy that brings the price down to middle class affordability. I bought three lol!
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Re: Improving the reliability of the Arrow JT-21M

Post by Sa-tevp on 1/3/2015, 11:52 am

Well, I'm glad they use the traditional ammo, but are they allowed with the new CMP rule changes? They sound like a real game changer.

Also, can I get support from the manufacturer at Camp Perry or the military armorers if I have a problem or the trigger is too light?
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Re: Improving the reliability of the Arrow JT-21M

Post by DavidR on 1/5/2015, 11:02 am

No problem, the CMP love these, they offer match grade models in their store in Anniston, also at camp perry there will be a giant mobile support vehicle sent from mainland china with full capabilities of repair and adjustment and clinics on how to get the most from your new purchase.
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