My internals (I believe) are Allied Ordnance (at least that is who built the gun.) I have modified it via Troy at BarrelXchange to shoot the 54R cartridge. I use only 148 grn. light ball.Curious...
Where are they breaking....the ears on the bottom?
Can you tell the direction of the break/crack?
IIRC...you replaced internals or switched from ORF design..?
Dan in Oregon
Is the rear of your BBL ext. machined for the trigger to clear like the one in this pic. The area is just above the rear tang where the nose of the trigger may hit. http://shop.ironcreationsllc.com/images/parts 014.jpg
Has your accelerater been machined a bit wider between the "ears" ?...........looks like yes
Check the rear of your BBL ext . for any visible marks from the trigger hitting in that area.
You say the Sear breaks @ the L...Right in the bend or more on the long leg of L ?
IIRC the caliber conversion your useing runs a tight headspace...
.just saw your pics above and
your trigger is possibly hitting BBL ext. ( looks like yours is not clearenced in that area) If trigger is engaged in the sear when/if? it hits the rear of your BBL Ext......this may be your problem. snap
Thanks Woodey, looks like that could be it! Just heard from KMP on that as well. I'm awaiting official word from them, but it sounds like the issue, and an easy one at that.
AHH the "NO" threw me! The tech sheet you put up seems to indicate a much larger and deeper cut than you show in the pics, but I get the idea. I'll get that cut out and seeYou still need the clearance cut for the tip of the trigger.
You can see in a couple of your pics where the trigger has hit on the back of BBL ext. ..just above the tang
The area that says NO...is the one you should have.
More info on that here....
like this... My m37 bbl ext....Essentially the same as your 1919 bbl ext.
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This could easily be done with a dremil if needed.