10.5 cycle problem

[tacdriver]

Just bought a 10.5 flat top.
Took it for a test drive tonight and it
would fire a round and not eject it.
Then jam another round in behind.?(15 rounds like this)
Not an AR guy, so I'm not sure if there is a break in period.?
Any suggestions?

Cheers
tacdriver

 

[prproulx]

What kind of ammo were you using? The 45 grain hollow points are notorious for this kind of jam.

 

[tritium]

You need an extra power extractor spring and the black extractor buffer...or just put a D-fender in it and it should cure it.

My 11.5 had the same issue but after the extra power spring, no probs!

 

[tacdriver]

I'm using AE 55g FMJs.

As for the D-fender?
Is there a web page?
So I know what I'm looking for.

Thanks
tacdriver

 

[greentips]

what brand is it?

 

[ARmike]

Is it from dlask? *wild guess*

 

[raks]

I think this is what tritium is talking about: http://www.fulton-armory.com/D-Fender.htm it is available through Brownells. I don't know if there's any Canadian retailers??

Never had a problem with my 11.5 but it isn't totally uncommon with the shorties.

 

[greentips]

I think Walt at Armseasts has the extractor upgrade kit - that may help you.

However, it will only help to certain extent if the gas port was grossly oversized by the factory

Your best course of action is to shove this thing back to the factory if the o-ring does not help - actually, the factory should be smart enough to put the proper spring or o-ring if they know what they are doing.

 

[dangertree]

We have the BC-USA extractor upgrade kit consisting of a stiffer extractor spring (5-coil CS), harder insert, and a Crane O-ring.

 

[tacdriver]

It is a Sterling upper.

I ordered a D-Fender,
try it first.
I also have a KX3 F/S coming.

Cheers
tacdriver

 

[greentips]

A sterling upper?? Never heard of a Sterling upper.....hmmmm Sounds like a upper made by bottom feeders.

 

[tacdriver]

Gee,
Thanks greentips!
Fuzzy feeling gone!

tacdriver

 

[tritium]

If you do what I suggested you'll be fine.

 

[katana_1127]

Extractor prob

Listen to Tritium, he solved my big problem and saved me big...
The KX3 is good only to direct the noise down range...
Good luck,
Robert

 

[greentips]

THis upper really gets my interest, so I did a search of the EE - is it this one??? Seriously, does anyone know of Sterling Armament? I doubt this is the UK one that makes the sterling SMG.

 

[(Ronin)]

Sterling = British contract made Armalite
But i thought they only made AR18 and 180's

That one pictured looks like an RRA/M1S upper
Does it say anything on the top of the barrel between the front sight and flash hider?

 

[Glen Valour]

Sterling Armaments Company and Sterling Works of Dagenham, Essex, England don't seem to be "eager to be found" (although you can google map their buildings) and as far as I can ascertain no longer produce firearms. They did produce licenced Armalites starting 1974 but I cannot find any information on how many of these were AR-15s and when they ceased production but it appears to be in the early 80s.

I would contact the seller and ask him about the provenance of the rifle. Was the bbl replaced or cut down? Was the receiver originally a carry handle model that has been made into a flat top?

 

[tacdriver]

Sorry out of town for Mine Rescue
past couple of days.

Anywho,
Yep that is the one.
Sterling had a contract with Armalite.
That's all I know.

Cheers
tacdriver

P.S.
Have to have your glasses on tight
when firing this puppy!

 

[greentips]

Sterling did make some AR18 under the license of the original Armalite - but that was long time ago. AR-15, by the 70's, is owned by Colt.

 

[fishy]

My 10.5 RRA upper did that for the first fifteen or so rounds, and really mangled the rim up on them. After the first day I just poked the extractor a bit and it's worked fine since.