SLR L1A1 STRAIGHT PULL

[Peter Laidler]

I wonder why it is marked non standard. Non standard what?

[Gil Boyd]

Peter,
One has to assume it is part of the avoidance of Sec 5 making them Straight Pull in this country. New undefined parts and all that!!!

[David TS]

Could it be marked non std because it is a barrel without the gas port?

[Gil Boyd]

David,
More like re chambered from something else!

[hayboy]

Regarding the NON STD markings, is it anything to do with the proofing in this country now being strictly to CIP?
I think that even if something is originally proofed to a load / calibre, if it is re-proofed now and falls outside of CIP criteria, the Proof House now marks it as non standard. Not one hundred percent sure, but think it's something along these lines.

Jon

[Gil Boyd]

This is all I could find on the London Prooof House website concerning barrels:

So how is a firearm actually proofed? And what requires it to be proofed in the first place? Abiding by the regulations of the Proof acts of 1868 and 1978, every firearm in the United Kingdom must be proofed before it can be imported, exported, sold, after it is made or modified.

Modification means that any substantial change to the barrel takes place that would affect the safe operation of said barrel (re-chambering, suppressor threads, shorter barrel, etc…).

In essence, what the law is trying to accomplish is to guarantee the safety of the end user from a faulty barrel (and in a roundabout way, protects the business making the firearms). The same process takes place with American manufacturers but it isn’t regulated by the government. There are set SAAMI standards that our gunmakers abide by on legal agreement but aren’t regulated by the U.S. government.

[bigduke6]

Gil, I have seen non standard before but am sure it was a different Calibre, John did ask me regarding the Non Standard and I would give the proof house a ring and let them clarify.

I think its to do with the components supplied to the proof house for them to load, this could be a big variation on bullet weight or similar compared to the standard ammo etc for a variation somewhere in the chamber........ too many variables to list.

If you can narrow it down then it may help resolve the problem or at least take the ammo or the chamber specs out of the equation.

[Gil Boyd]

Geoff,
I have spent ages trawling the web for anything relating to NON STD (non standard) in Proof house terms......nothing.
I will try and contact them at London, but Birmingham are 100% easier to speak to and contactable.
I can only assume, as the rifle when issued to the Army is "Standard" and if bought in this country by a private shooter it still conforms to a Section 5 weapon and therefore cannot be held by a normal FAC holder, unless converted.

To get around this so shooters can use an L1A1 has to be built as a straight pull, and to make it acceptable it has to conform to "Non Standard" parts as issued originally with the rifle, and that is the simple meaning in my view of NON STD stamped on the barrel, or does it only relate to the barrel??

Any views until I hear the real reason?

[Peter Laidler]

Wish I hadn't asked now.......... So much for trying to keep the thread on finding a reason and a cure for sticking SP L1A1's................

[Gil Boyd]

Peter,
Surely this is what we are trying to achieve by thrashing out as many likely causes as possible.
Albeit, the barrel is stamped NON STD 7.62 X 51 it may be it works better with one manufacturers round then others, which is why I am going to try GGG rounds through it next week, and hopefully get a good result