Rifle build

[kriller134]

[longrange1]

Dude that rifle looks awesome!!!!
Looking forward to hearing the range report.


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[DriftinG Z32]

Sweet looking build. How's the clearance between the scope objective and the chassis? From the pic it looks like there's no clearance.

[kriller134]

Dude that rifle looks awesome!!!!
Looking forward to hearing the range report.


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[kriller134]

Sweet looking build. How's the clearance between the scope objective and the chassis? From the pic it looks like there's no clearance.

[smoothy8500]

Nice! Maybe we'll see you at Pendleton sometime.

[ar15barrels]

How is the trigger/bolt timing?

[kriller134]

How is the trigger/bolt timing?

[ar15barrels]

It's hard to explain.
You have to feel a rifle with tuned bolt and then feel yours again and then you would understand immediately.
It's about synchronizing the travel of the cocking piece to the trigger so that the bolt closes as easily as possible.
Stock parts always have tolerances built into them to guarantee they work and with those tolerances come extra travel that creates bumps.

[NorCalFocus]

[sigstroker]

Did you screw in the barrel yourself? How did that go?

[kriller134]

Did you screw in the barrel yourself? How did that go?

Very easy. Just used a barrel vise and I got a rear entry action wrench. Torqued it on to 75 ft lbs.

[diver160651]

[LynnJr]

Kriller134
I will post some pictures for you showing how a custom action gets timed.
On a BAT Machine action they use a trigger hangar rather than putting the two crosspins through the actions body.
The hangar is just the two crosspins and two socket head capscrews in a tiny piece of good aluminum.
The two set screws positively locate the trigger hangar onto the action.
The crosspins however can be set at a neutral setting or offset generally in 0.005 increments.
The hangars are reversible as well giving you more options.
Why do we do this?
If your first build comes out perfectly from the factory with all of your tolerances exactly on the spot you are good to go.
BUT
If you do any work on the lug abutments the lugs or swap out the cocking piece you MAY have thrown off the timing. Likewise if you change out the trigger it can do the same thing.
By having offset hangars you can tune it back to where you want it.
I have no idea on how this is done on guns without a hangar so Randall will have to explain that.
Oh yeah the normal disclaimer about my photo quality

[ar15barrels]

I have no idea on how this is done on guns without a hangar so Randall will have to explain that.

I install the whole firing pin subassembly with the shroud and cocking piece into a fixture I made for my surface grinder and I move the surface rearward that contacts the sear on the trigger assembly.
Before that, I radius/polish the edges of the bolt that interact with the cocking piece.