IMBEL bolt won't fit in DSA Para carrier

[deltaheavy]

I have a DSA Para lower and carrier sitting around from when I converted a factory DSA STG58 Para to a standard fixed stock rifle. Over time, enough FAL parts have accumulated that I'm tempted to build that lower half into another rifle. Here's the rub: last night I attempted to install an as-new IMBEL bolt into the DSA carrier, and the bolt wouldn't fit. The back of the bolt would not drop into the carrier no matter how I pushed, turned, wiggled, swore etc. The following picture is not my actual carrier, (part of a Google image attributable to T. Mark Graham) but is marked up to show where the interference is occurring.
http://www.hunt101.com/data/500/medium/carrier.JPG
When I compare the dimensions of the DSA para carrier to both of my standard carriers, the red area on the DSA is visibly closer to the rear of the carrier by +/- 1/16", which does not allow the IMBEL bolt to drop in. The original STG58 bolt will fit in the carrier, so I'm not bashing DSA. I'm assuming the DSA carrier uses a tolerance on the tight end, and wondering if this area on the Para carrier can be machined larger to work with the IMBEL bolt? Or would I be better served by finding an STG bolt to make the Para build go together? I want to use the carrier for a compliance part if possible. Has anyone seen this before, and if so, what was the fix?

[paulb2112]

I have filed the lower rear corners of the firing pin extension and put them in before. If you look that is probablly where bind is.
There are different pin extensions and styles. at most you could change that and bolt would go.
Of course I never use DSA action parts myself.

[def90]

Some times on an "as new" tight fit you need to push in the firing pin to get the bolt to slide in.

I had an Imbel kit that had a tight enough bolt to carrier interface that the pin had to be depressed to get the bolt into the carrier.

[deltaheavy]

Some times on an "as new" tight fit you need to push in the firing pin to get the bolt to slide in.


Lol, I'd be worried if I DIDN'T have to push in the FP. That's totally normal and definitely not the problem here.

[deltaheavy]

I have filed the lower rear corners of the firing pin extension and put them in before. If you look that is probablly where bind is.
That was it. Problem solved. I stripped the Imbel bolt this morning and it dropped right in. That got me looking hard at the firing pin. Already knew compressing the FP wasn't enough, so I started parts-swapping. My FPs are single-piece, so I tried the STG pin in the Imbel bolt. Still no joy. Took a hard look at how the FP tail fit against the standard carriers vs the DSA para. Tail was not going in as far on the DSA. Took a file and barely broke the hard corners on the firing pin tail. Just a few thousandths and now the bolt fits.