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Need Help With Breech Trunion


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Hello All,

 

We have an issue with Dad's Sten Mk3 and hope someone here may be able to help.

We had it re-barreled and the workmanship looks superb, but the charging handle does not reside where it originally did when the bolt is closed and the breech trunion is flush with the forward magazine cutout in the receiver.

 

We are conscerned about firing the ol' girl.

 

Any help is appreciated.

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The person who fitted the barrel should have test fired it but I suspect it will give feeding problems as the lead-in angle will be too severe. Ideally the feeding should be checked with dummy rounds before attempting to fire it. There is no danger in the firing of it as the barrel and bolt relationship remains the same but it may have be returned to have the barrel set forward to get the feeding angle correct.
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Thank you for the response!

 

We cycled some dummy rounds, and you are correct, there is a feeding issue. Upon closer inspection we noticed that it appears as if the breech trunion was polished or it has been replaced/remade. The front trunion has its original dings/scratches. Does this mean that the barrel that was installed is too long?

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