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it was a lot of work. It could be the probe, barrel, or transfer port o-rings/seals. Change all of them. Watch for damage as you remove/insert the barrel. Rok and Tony provided guidance and parts. Thanks to the both of them for helping me through that issue. Send me a DM with your number...

I did!!! And it is dope af!!! Worth the drama and the wait.

idk man you're good where you are. don't change anything. do less. sometimes it's not the dam guns it's us.

This sucks. FYI i did a lot of testing and measuring and I'm very certain clipping occurs from pitch/yaw on the slug from launch dynamics. I found that a fully open valve spring regularly produces clipping, while some turns (2+) produce much more consistent shots and no clipping, regardless of...

@RTI Arms please let me know.

Hey @Scott.t were your monocore misalignment issues resolved? I ran into the trigger issue, then dealt with ear-ringing cracking bang near the breach that took me forever to resolve and I had to do a TON of work. Now that I can actually shoot it, I have the same clipping issues as you.

Yeah this is a massive difference. Do you have a micrometer to measure with.

I tried various Zans, various AVS calibers and grains, and other variants. NSAs performed significantly better in my setup, but every setup is different.

there is hope:

UUUUUUugggggh. Time to call my cc company.

Is Steve out of business?

I'm coming up on 2 mos since I placed an order for an "in-stock" L-tech Probe in black PRS .25. No reply to my emails/calls/text. I have been told by others to just be patient.

What is the benefit of a movable partial pic rail vs a full pic rail? Slight weight savings? Moving the pic rail will most definitely introduce POI shifts. Just give me a full pic rail and i will place the optic where I need it on the rail, no need for the rail itself to move. Seems silly but...

The M4 should be called the M3+. This is very underwhelming.

NSA .254 slugs, which actually measure .255, are by far the best slugs for the gk1. 33.6gr slugs are great if you're looking to optimize the cylinder capacity for a full magazine. Here is a 17 shot mag dump at 15 yards using a bag rest @ ~1 shot/sec using primary arms slx 3x prism.

update: Both 33.6gr and 38gr NSA .254 slugs, which actually measure .255 at the base, shoot amazing out of the GK1 They have an R4 BC ~.088 with the first shot at 860ish fps and the 17th shot at 815ish fps when starting with a 350bar fill. The accuracy is very very good. I tried AVS .254...

Awesome shooting, thank you. I will have to check them out. Around the 40 second mark of the second video I noticed you got some POI shift up and right. Any idea what that was due to?

Im jealous of your pic rail. To be clear your baracudas did not make it to the video?

I just ordered many avs varieties in this caliber. Which di you use? Do you have any shot group pics?