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Old 08-09-2010, 07:02 PM
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Remainder of Fuzzy Limey Project ... Izhmash Biathlon Basic Modifications

Originally Posted by aom22 View Post
BI 7-2 Trigger Modification
& Stage 3 - Trigger Mechanism Adjustments and Modifications ...

If Fuzzy ever finished this article in Fuzzy's Projects
it would be exactly what you're looking for - I think.
Izhmash Biathlon Basic Modifications
Here is very brief description of the remainder of the project.
Originally Posted by Fuzzy Limey View Post
... To be as brief as possible, for this post, basically two things need doing
... slightly trim back and smooth one jagged end
of the double-ended hooked spring - (L.H. Bottom in my illustration).
This will make it a little easier to slip back into place when re-assembling the trigger unit.

Secondly, the trigger pull weight can be adjusted "up" or "down"
by screwing in/out the threaded rod
with the transverse hole in one end that fits
in the "sear actuator bar", (R.H. Center in my illustration).
Final adjustment of creep can be done with the small screw in
that same actuator bar .... it's trial and error here.
Don't get the threaded rod screwed out too far to reduce spring tension
or it'll just flop around.
My suggestion if this is not light enough is to hunt up
or make a new spring using thinner gauge wire.
In my case I needed to heavy up the pull to 3# for CMP competition.

Bryan - The Fuzzy Limey

PS: A very small pair of fine needle-nose pliers comes in handy
in manipulating the spring hooks into place
... also an assortment of finish nails and fine watchmakers screwdrivers help as "third"
- (and "fourth") - hands when re-assembling the complete unit.

PPS: If by any chance you intend to use this BB for CMP shooting,
be aware that it is extremely easy to inadvertently touch
and move the safety lever back slightly in Rapid Fire antics.

I suggest drilling a small in the blade of the lever in front of the trigger guard
and inserting a small diameter roll-pin to temporarily disable the safety feature
... this is NOT a recommendation for a permanent installation !!!
W. Edwards Deming ... Quality: It is not enough to do-your-best;
you must know what-to-do, and ... then ... do-your-best.
Ever-Onward ... Through the Fog ---- Fort Stockton TX 79735
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