Patriot Defense R5 interruptor

[johnbu]

Hello all.  A buddy came by with a fresh stock 2 and a pile of PD parts. He wanted a lesson in initial polishing and installing all the parts. 

 

From the factory the gun was 10#  15oz DA and just under 4# SA.

 

Polished up all the normal spots with extra attentions to the trigger bar lifter. Changed all the springs to the Patriot Defense Optimized.  Trigger, sear, 15.5# hammer, firing pin return.  Polished the interior of the hammer spring and strut.

 

Installed the R5 rather than the bolo as i wanted to see how "drop in" it really was.  Used a brand new Titan hammer and xtreme 1 piece sear (which is supposed to be the optimum pairing for drop in success).

 

Long story short... it dropped in and functioned flawlessly. Smooth DA pull, sharp crisp SA without much motion.  Reset was a notable click.  In short about perfect. 

 

About.  Joe Wilson has posted how to lengthen the DA hammer stroke (look it up here) and it could use that.  However, the da "pencil launch" test showed a height that should pop cci primers in da all day long.

 

As a percentage, I'd estimate the R5 dropped in gives 90% of what a gunsmith fit bolo gives ... with an hour less time spent futzing and fitting it.

 

For a person that wants a trigger upgrade, without the fitting bother this is it.

 

Oh, the safety lever "bump" had to be trimmed down to allow engagement with the 1 piece sear / Titan hammer combo. The hammer pivot is changed from the heart shaped hammer which lifts the sear more. That causes the interference.  After doing that the final DA was 6# 3oz

SA was 3# 2oz.

[Polymer]

Do you think the wing on interruptor being on other side vs older bolo impacts trigger characteristics much?

[johnbu]

56 minutes ago, Polymer said:

Do you think the wing on interruptor being on other side vs older bolo impacts trigger characteristics much?

No, i don't think it makes any difference

 

 

[mrd]

11 hours ago, johnbu said:

Oh, the safety lever "bump" had to be trimmed down to allow engagement with the 1 piece sear / Titan hammer combo.

 

Nice writeup. Just asking for curiosity - isn't it better to fit the sear leg instead of the bumb on the safety? The end result is the same, but the sear is the cheaper part and the modification of the safety might make it incompatible with  future hammer changes. I know this after trying to install an Eimantech SA hammer on a gun with modified safety "bump", the safety would never engage with this hammer.

[Nathanb]

It’s a preference thing. 

[Tirppa]

Wish I could get one to Europe 

[Igarciatf]

You have it on the Eric Grauffel online shop. Shipped from France. 

[johnbu]

On 1/19/2021 at 6:20 AM, mrd said:

 

Nice writeup. Just asking for curiosity - isn't it better to fit the sear leg instead of the bumb on the safety? The end result is the same, but the sear is the cheaper part and the modification of the safety might make it incompatible with  future hammer changes. I know this after trying to install an Eimantech SA hammer on a gun with modified safety "bump", the safety would never engage with this hammer.

 

The $ difference is 20 bucks. The ability to control the fit for that nice positive engagement is far easier shaving the bump.  Plus, the "bother" of removing, disassembly, trim, reassemble, test, repeat 5-7 times is gone. 

 

Both work, and your point is correct (on future hammer swapping).  Still,  preference is bump after mostly doing the sear.

[Tirppa]

On 1/20/2021 at 1:00 AM, Igarciatf said:

You have it on the Eric Grauffel online shop. Shipped from France. 

There's only the old BOLO and since Eric has been team CZ for a while now he probably won't bother with the new parts.