mainmech48
Member
I bought an unusual little .22 RF rifle a few years back. Being a .22 RF Junkie, I couldn't help myself. The price was right, and I'd never seen one before. It's a straight-pull BA BRNO ZOM 451.
What passes for a manual touts the adjustability of the trigger but includes no diagram, no exploded drawing parts list and no procedure/description to do the job. :banghead:
The trigger as it came is very heavy, IMO, at over 7#. There are three separate screws each of which must control some aspect of the trigger mechanism. The frustrating thing is that, so far, is that I'm darned if I can identify exactly which one does what. It's driving me bonkers.
I've spent hours and worn out several plastic snap caps fiddling with each one separately and in seemingly endless combinations of order. Fortunately, I counted turns and direction and wrote them down as I went along. Every time I end up having to return to Square 1. It seems as if I get an improvement in one thing, it's always at the expense of something else that's just as important.
The trigger is a 2-stage affair and the linkages in the mechanism are strange, complex and convoluted. Everything is lumped together into one housing. When the trigger group is in place it's impossible to see how the parts are interacting and when I take it off the relationships don't get any clearer, as no matter which way I turn the various screws there doesn't seem to be enough visible movement in anything to judge what it should affect or how.
I've never been in this position before. I've always been able to figure out how a piece of machinery is supposed to work if I went about it systematically and patiently. This one has me ready to tear out what little hair I have left.
There has to be some "correct" formula to get a reasonably decent weight of pull, safe, positive sear engagement and smooth, light take-up on this rifle all at the same time. So far I can't seem to find it.
I'd sure appreciate any help or suggestions on how to figure this one out! Emails to BRNO don't seem to get any response at all.
What passes for a manual touts the adjustability of the trigger but includes no diagram, no exploded drawing parts list and no procedure/description to do the job. :banghead:
The trigger as it came is very heavy, IMO, at over 7#. There are three separate screws each of which must control some aspect of the trigger mechanism. The frustrating thing is that, so far, is that I'm darned if I can identify exactly which one does what. It's driving me bonkers.
I've spent hours and worn out several plastic snap caps fiddling with each one separately and in seemingly endless combinations of order. Fortunately, I counted turns and direction and wrote them down as I went along. Every time I end up having to return to Square 1. It seems as if I get an improvement in one thing, it's always at the expense of something else that's just as important.
The trigger is a 2-stage affair and the linkages in the mechanism are strange, complex and convoluted. Everything is lumped together into one housing. When the trigger group is in place it's impossible to see how the parts are interacting and when I take it off the relationships don't get any clearer, as no matter which way I turn the various screws there doesn't seem to be enough visible movement in anything to judge what it should affect or how.
I've never been in this position before. I've always been able to figure out how a piece of machinery is supposed to work if I went about it systematically and patiently. This one has me ready to tear out what little hair I have left.
There has to be some "correct" formula to get a reasonably decent weight of pull, safe, positive sear engagement and smooth, light take-up on this rifle all at the same time. So far I can't seem to find it.
I'd sure appreciate any help or suggestions on how to figure this one out! Emails to BRNO don't seem to get any response at all.
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