Jamming AR-7
MuzzleBreak
chronic jamming problem. The bolt pushes the bullet against the barrel, but
not in the actual chamber of the barrel. When the bolt is released (either
by hand or by the gas mechanism), the bolt slams down on the bullet,
jamming it sideways against the barrel (with the bolt open). The bullet
itsef is deformed, and I can't eject it without pulling back on the bolt
and ejecting the whole magazine.
Sometimes, I can fire a full 8 rounds straight and everything is fine.
Other times, I can sit there jamming and ejecting 8 rounds in a row. Not
fun at all, obviously. Ammo is expensive, and I've only tried one type so
far; but I don't have the money to test ammo on this thing yet.
I searched Google groups and found an obvious solution: THROATING THE FEED
RAMP AREA OF THE CHAMBER. I have never heard the term "throat". What is he
talking about, and why will it help?
Also, is anyone familiar with modifying the hammer spring to improve the
action?
If you can clue me in on anything that would be great. Thanks for reading.
Palmaniac
chamber in the barrel (just a little) to create a sloped feed ramp solved
the problem with the factory mags.
Still, the aftermarket extended mags I bought won't feed worth a damn. The
factory 8 round mags feed all 8 consistantly now.
I used a small, round, needle file and just slowly worked the bottom edge of
the barrel down so the round "slides" in.
Good Luck
Bob
"MuzzleBreak" <g...@kwe.com> wrote in message
news:Xns93B0D4F44...@64.154.60.178...
MuzzleBreak
news:uQ5Oa.9231$ND....@fe2.columbus.rr.com:
> Had much the same problem, and found that filin down the bottom of the
> chamber in the barrel (just a little) to create a sloped feed ramp
> solved the problem with the factory mags.
>
> Still, the aftermarket extended mags I bought won't feed worth a damn.
> The factory 8 round mags feed all 8 consistantly now.
>
> I used a small, round, needle file and just slowly worked the bottom
> edge of the barrel down so the round "slides" in.
>
> Good Luck
>
>
>> I have an AR-7 Explorer. Sometimes it shoots nice. Sometimes it has a
>> chronic jamming problem. The bolt pushes the bullet against the
>> barrel,
> but
>> not in the actual chamber of the barrel. When the bolt is released
>> (either by hand or by the gas mechanism), the bolt slams down on the
>> bullet, jamming it sideways against the barrel (with the bolt open).
>> The bullet itsef is deformed, and I can't eject it without pulling
>> back on the bolt and ejecting the whole magazine.
>>
>> Sometimes, I can fire a full 8 rounds straight and everything is
>> fine. Other times, I can sit there jamming and ejecting 8 rounds in a
>> row. Not fun at all, obviously. Ammo is expensive, and I've only
>> tried one type so far; but I don't have the money to test ammo on
>> this thing yet.
>>
>> I searched Google groups and found an obvious solution: THROATING THE
>> FEED RAMP AREA OF THE CHAMBER. I have never heard the term "throat".
>> What is he talking about, and why will it help?
>>
>> Also, is anyone familiar with modifying the hammer spring to improve
>> the action?
>>
>> If you can clue me in on anything that would be great. Thanks for
>> reading.
>>
>
>
Yes, that sounds like it makes sense. This is a really fun gun if you
can get it to work right. I'll try making a feed ramp and tell you how
it goes. Thanks
MuzzleBreak
> Had much the same problem, and found that filin down the bottom of the
> chamber in the barrel (just a little) to create a sloped feed ramp
> solved the problem with the factory mags.
>
> Still, the aftermarket extended mags I bought won't feed worth a damn.
> The factory 8 round mags feed all 8 consistantly now.
>
> I used a small, round, needle file and just slowly worked the bottom
> edge of the barrel down so the round "slides" in.
>
> Good Luck
>
>
>> I have an AR-7 Explorer. Sometimes it shoots nice. Sometimes it has a
>> chronic jamming problem. The bolt pushes the bullet against the
>> barrel,
> but
>> not in the actual chamber of the barrel. When the bolt is released
>> (either by hand or by the gas mechanism), the bolt slams down on the
>> bullet, jamming it sideways against the barrel (with the bolt open).
>> The bullet itsef is deformed, and I can't eject it without pulling
>> back on the bolt and ejecting the whole magazine.
>>
>> Sometimes, I can fire a full 8 rounds straight and everything is
>> fine. Other times, I can sit there jamming and ejecting 8 rounds in a
>> row. Not fun at all, obviously. Ammo is expensive, and I've only
>> tried one type so far; but I don't have the money to test ammo on
>> this thing yet.
>>
>> I searched Google groups and found an obvious solution: THROATING THE
>> FEED RAMP AREA OF THE CHAMBER. I have never heard the term "throat".
>> What is he talking about, and why will it help?
>>
>> Also, is anyone familiar with modifying the hammer spring to improve
>> the action?
>>
>> If you can clue me in on anything that would be great. Thanks for
>> reading.
>>
>
>
Yes, this gun is much better now. I grinded a very small ramp with my
dremel tool. I gradually made it bigger and adjusted the angles until I
got a good feed, which took about 3 light grind jobs / 6 test feeds. Out
of 32 shots, I had only one misfeed; but I still have another problem.
Some of the bullets do not fire because the pin is not coming down on
the rim hard enough, or is striking too far outside the rim's primer
area. I think I just need to clean the internals (hopefully). Thanks
again.
aezael
I would not mess around with the hammer spring because you really
need a strong hammer to fire the rim fire cartridges. But if you want
to improve the feeding you might want to let us know who is the maker.
The AR-7 has been made by at least 4 different companies. I have a
original AR-7 from Armalite and another a company calling its self
AR-7. To answer your question throating is the process of SLOWLY
grinding or polishing the lower ramp to all the cartridge to get in
the chamber with out hanging on the upper lip of the chamber.
I have one of the tricked out AR-7's for the AR-7 company and I also
have 4 30 round magazines that work perfectly, but it took me a long
time to make it work right. You might want to contact Paladin Press
for the AR-7 manual.
Lots of luck !
as...@global.net
Every AR 15 M16 I have used or come across has had a chrome chamber and
bore. I don't reccomend throating the chamber.
This proble is frequently caused by a ever so slightly out of spec
magazine or off brand magazine and or weak magazine spring and or
defective follower. Try stretching the spring in that magazine as a
first attempt. If that don't work get a Colt magazine. I have always had
good luck with the OEM. Perhaps others might shed a little more possiblity.
aezael
There's a lot of difference between a AR 15/M16 and the AR-7 which is
a .22 cal long rifle.
thebr...@earthlink.net
as...@global.net
I guess I had one too many to drink. I read Ar15 instead of AR7. Sorry
bout that.
R. E. Karlsen
The first was dirt or residue in the action. A quick cleaning and blow
drying with canned air usually cleared up the jamming. Some light lube (Rem
oil or Rem dry lube) after solvent cleaning is also necessary.
Most common was ammo. As I remember, standard velocity lubed lead
bullets (40 gr) were the recommended load, after it loosened up the high
velocity (40 gr) worked just as well. The lighter "Hyper-velocity" types
always seemed to cause jams. I would stay away from any of the odd shaped
bullets and stick to the standard style solid points.
If you are getting the bullet jammed because it is not entering the chamber
properly, I'd put my money on the bullet design. Around here the local gun
stores usually have a variety of .22 ammo available by the box of 50 rather
than by the brick, a few boxes of different 40 gr, round nose and you should
be able to find what you rifle prefers. I would stay away from the steel
case imports if you can. They seem to shoot good at a cheap price but they
tend to be really dirty (powder residue).
Hope one of these ideas helps
Richie
<aezael> wrote in message news:h0v1b1plsin6l83ah...@4ax.com...
thebr...@earthlink.net
Kanda' Jalen Eirsie
I've got 2 of these, One from Charter Arms, and another from Armalite. One I purchased
new many many years ago, the other I got in a local pawn shop. I wouldn't ever buy
another one...
They BOTH exhibited the exact same problems - despite being from different manufacturers.
However they both work very well now. However neither of them EVER successfully fed ammo
from the supplied 8 round metal clip. I have a number of surviving 25 round Ramline
clips, (which used to operate a factory here in my home town) But mostly use the 10 round
plastic ban clips now.
I've had both of them since about 1985-6 - So they are Both at least or nearly 20 years
old, and have had THOUSANDS of rounds through them each...
After trying many things in an attempt to figure out what was going on with the feed jams,
trying every kind of ammo, different clips, etc, I even built my own clips once...
Here's what I eventually did to solve the feed problem:
I clamped the disassembled cleaned barrel - chamber up between 2 blocks of wood that had V
notched cuts in them, and neoprene buffers - in a vice. I didn't want to take any chances
of deforming the barrel...
I then slowly lapped a feed ramp polished depression onto the lower edge of the chamber on
the hideously machined metal. Mind you I didn't grind out or cut any metal - Basically
ALL I did was polish up some REALLY super sloppy machining left on the back of the
barrel/chamber. Rough Spikes and flashes and machine marks that were catching the soft
lead tips and keeping the bullet from sliding up into the chamber. If you take off too
much you will leave a gap between the bolt face and the extractor wont work right - If you
take off too much around the actual chamber you will get blow outs as the rim ruptures.
Basically, if you can feel ANYTHING rough with your fingertip along that back side of the
chamber leading up to the chamber - A bullet will follow Murphy's Law...
Previously, the ONLY ammo I could even remotely call reliable were the hideously useless
round tip Remington Golden Bee's - Hollow points would work about 50% of the time - and
anything else was just right out if it had the typical bearing band around the bullet.
After the polishing job, I can fire just about anything even the conical Yellow Jacket
Hyper velocity rounds feed reliably now.. The only thing that for some bizarre reason
STILL refuses to work, are the 2 original supplied metal 8 round mags...
And as a bonus - They seem to be a LOT more accurate now, as if the bolt is now properly
facing on the chamber since it's now polished and much smoother...
BOTH of the guns I have, and every other example of them that I have ever seen, in stores,
at shows and in collections ALL exhibit the same sloppy piss poor workmanship - as if they
were just stamped out and tossed in a box with NO regards as to form or function.
Like every other cheap ass piss poor model Armalite ever created, The AR-7 needs to be
kept very clean and do NOT over oil it.
The Armalite one, still, however likes to double and triple tap every once in a while,
"once" firing off the remainder of a 25 round clip - maybe 10 rounds??
Armalite - Cheap Chinese shit - American Style!
ll
Kanda'
<>SPAM-KILLER<>- If you really want to contact me, then -
kandaje<at>bresnan<dot>net
You figure it out...
jimmy...@aol.com
is that the rifle has no feed ramp.Look at Ruger 10/22 rifles,Marlin
M-60's, and the like-they have a feed ramps. Why Henry didn't correct
the issue somehow is beyond me. I guess a slight feed ramp<I mean
tiny>can help reliability...as well as using good ammo such as CCI
Minimag ammunition(solids) can help. In all reality, 22's were not
designed for semi auto weapons. Anybody have luck with the Henry AR-7??
Thanks gents...
aezael
I would like to know who posted the first of these messages about
the AR-7. I have posted a number of answers about this problem and
thought everyone had answers.
I have a original Armalite AR-7 and one of the newer tricked out
AR-7's from a new company which I spent about 5 hours polishing
the lower ramp and after that an other 4 hours disassembling the
receiver and polishing the inside of the receiver with crocus cloth.
I now have a AR-7 that can shot all 25 rounds as fast as I can pull
the trigger with four different magazines.
So that's about all I want to say. If you want to get some more
answers why don't you buy the book from Paladin Press that
shows all of this information..
johns
<jimmy...@aol.com> wrote in message
news:1128814506.9...@g49g2000cwa.googlegroups.com...
top and that was really fun to shoot. I bring it to the range in a small
violin case. Anyway, after my 412th jam, I took the damn thing apart and
gave it a close inspection of all parts, moving and non moving. The culprint
is the pot metal side plate, on the left side. It warps from it's single
mounting screw. Putting a scope mount on it warps it more. I never force
anything, so I beat it straight and repainted it. Took off the scope mount.
I took a Dremel tool to the barrel and made a real satisfactory ramp, then I
polished it real smooth. Plastic lipped Ram line magazines suck, so I use
the stock 8 round type. It seems to feed well now, but I can't have an
unreliable rifle with a warping pot metal side plate. I'm going to sell it
or trade it with the violin case.BTW you can find parts on ebay, or do a
google search and there is a company making and selling all parts new,
except the receiver.
Ed
I'm not the original poster, but I like the idea of polishing the inside
of the receiver. I did polish my bolt, but I will now polishe the
receiver. I have never been able to shoot all 25 rounds out of a
plastic lipped Ramline. Maybe I shou'd buy a new mag. I'm not sure about
Palidin Press, but there are books that are real informative, but also
contain info on how to convert an AR 7 to full auto, or select fire.
Possession of any of these books, while in possession of an AR 7 is
considered the same as possessing a full auto weapon according to BATF.
Brian Bunin
<CHOP>
>
>I'm not the original poster, but I like the idea of polishing the inside
>of the receiver. I did polish my bolt, but I will now polishe the
>receiver. I have never been able to shoot all 25 rounds out of a
>plastic lipped Ramline. Maybe I shou'd buy a new mag. I'm not sure about
>Palidin Press, but there are books that are real informative, but also
>contain info on how to convert an AR 7 to full auto, or select fire.
>Possession of any of these books, while in possession of an AR 7 is
>considered the same as possessing a full auto weapon according to BATF.
Since when is possesion of ANY book illegal?
Rose Melinis
that qualify me as a pilot?
I would dearly love to read the supposed regulation on this.
"RayGunn" <Kau...@mothership.org> wrote in message
news:AfG7f.11360$gj1.9658@fed1read05...
> It's not the book by itself, but if you have a weapon with instruction on
> how to convert it, they consider it converted.
Head Shot
> If I have a pile of aluminum, and a book on how to build an airplane,
> would that qualify me as a pilot?
ROFL. If I have a picture of J-Lo; does that make me a stud?
--
______________________________________________________
The sniper has special abilities, training and equipment. His job is to
deliver discriminatory highly accurate rifle fire against enemy targets,
which cannot be engaged successfully by the rifleman because of
range, size, location, fleeting nature, or visibility.
** FM 23-10 Sniper Field Manual
aezael
try using different types of ammunition and use the one that does not
jam so much second you should check the feed ramp of your gun and see
if it is smooth, the explorer is not made by Armalite, I had the same
problem and I took a abrasive tool and polished the lower ramp where
the bullet is pushed up from the magazine and slightly polish the
upper part of the chamber. I have a AR-7 that I shoot a 30 round
completely dry with mo problems after doing this, use only a very
fine abrasive tool and be very careful to not do to much, Good luck
!!
arizonajohn
>> If you can clue me in on anything that would be great. Thanks for reading.
>
> If you would like to improve your AR-7 you can do two things, first
> try using different types of ammunition and use the one that does not
> jam so much second you should check the feed ramp of your gun and see
> if it is smooth, the explorer is not made by Armalite, I had the same
> problem and I took a abrasive tool and polished the lower ramp where
> the bullet is pushed up from the magazine and slightly polish the
> upper part of the chamber. I have a AR-7 that I shoot a 30 round
> completely dry with mo problems after doing this, use only a very
> fine abrasive tool and be very careful to not do to much, Good luck
> !!
side plate gets warped (potmetal) and doesn't hold the magazine in place
properly. This is usually caused by tightening the side plate too tight.
You can play with a warped side plate until you are nuts, and maybe
should get a new one.
I had one an earlier AR-7 and got hold of a sliding butt stock, barrel
shroud, etc. I put a cheap laser on it for fun. I bought a small violin
case at a thrift store and carried my AR-7 to the range in it. The guy
at the range would crack up. It was funny. Lots of fun shooting it with
a laser and very accurate at the indoor range.