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Beyond the tolerance issues, I absolutely cannot stand the recoil impulse of any UZI in closed bolt vs open bolt. Open is just so much smoother. (For the UZI). Closed bolt UZI's shoot too fast and don't leverage the heavy bolt to soak up the recoil impulse like open bolt does. When I had my...

Looks awesome! I had a small run of .45 CMMG compatible made and started doing some SD testing with it. I was really hoping that could get away with a small LW setup like I did in 9mm. However, since there are not many .45 SMG cans out there, I decided to go with the alpha thread pattern and...

So.....I've been working on an ADJUSTABLE SD for the CMMG RDB setup in 9mm as mentioned on my site here: https://c3junkie.com/?page_id=3816 I have been very impressed how an SD chamber can make a small, LW can sound great. That said, I am also working on a .45 CMMG RDB integral setup as well...

The Ballistic Advantage EPC barrels have a pretty big feed cone and IME buldges brass too. I don't have a roll sizer. I modified a few of those barrels for the CMMG RDB system but the feed cone doesn't help at all with that system. So I prefer not to use that barrels since I reload.

Yes that looks identical to the ones I have except none of mine have any markings. I recall them not being around $40 or so when I got them at the Creek. They are really heavy duty though

A guy that posted on AR15.com back in the day that I think went by the name 'Swede' or something like that came up with that idea. My friend that was making the kits for Spike's later incorporated that into those kits. Picture of this mod below is from my website of when I was selling those kits.

My cheap solution I did like 20+ years ago:

Again, I'm in FL with no first hand experience but I thought I saw somewhere that the AZ Regulator, Partisan Disrupter and RB work.

I was just at the range this past weekend with a friend that has a bunch of cans. He has the CT9KS which is now called the MK9 from Shaw. He also has the Tisha in 9mm, CAT MOB, Litihium and Sub9. Several more but that is what he had on hand. So when you say MK9, are you asking about the OG MK9...

This is all discussed on my website and 'HighriseATX' already posted a link to my site in his post. That is where I pulled that picture from. Here is my webpage again: https://c3junkie.com/?page_id=1142 Another picture from that page: 3 lug with a Bixler mount is the most convenient and you...

I've been using 5.45 Krink boosters for years like this: https://palmettostatearmory.com/soviet-arms-krink-5-56-5-45-booster.html I got then cheap back in the day at the Creek and then got 24mm to 1/2-28 adapters.

CAT MOB is probably the quietest on the market for 9mm but it is also long. I like short and fat for the UZI. Even at 2" OD, it doesn't interfere with the sights on the UZI.

No... Jerry didn't invent that buffer. Bradley Snyder invented it and his company was Omni Robusta. I have one which broke. He sold his IP to Jerry Miculek. Here is Bradley's patent. https://patents.google.com/patent/US11187477B2 I just communicated with him last week. This is an...

There is a guy on Reddit that posted that the magnetic messes with the SS as it magnetizes the carrier which causes issues. However, that doesn't seem to be an issue with a Rarebreed, Partisan Disruptor or AZ Regulator.

Yes, I tested the new Kynshot prototype last weekend and myself and a recently retired LE firearms instructor also helped me doing some comparisons. I was also testing a magnetic buffer I made which he said was better than the RB5007 and says is still slightly better in full auto than the new...

I assume you are getting the pulled GDHPs projectiles from American Reloading or some other source and reloading them? I got a bunch of their Federal HST 147Gr cheap to mess around with myself.

I never liked adding buffers to the full size UZI to speed them up. The late BWE didn't like to do it either. I did play around with lightening the FS UZI bolt as documented on my site here: https://c3junkie.com/?page_id=2028

Weather.gov speed of sound calculator based on temperature. https://www.weather.gov/epz/wxcalc_speedofsound Humidity should also affect speed of sound in addition to temperature. There are other factors like altitude / air density etc...

Thanks for the info. I see some Youtube videos of some people trying SS's with the JTS and they look hard to control. The videos on the Genesis looks impressive with its short recoil action. I may just have to save my pennies for the Genesis.

Anyone here know anything about these AR10 based 12 Gauge uppers used with a SS? A guy had one at the range but he had a 3D printed lever which broke. Since I'm an FFL / SOT, I am thinking to just make a post sample .308 lower. I have seen the Genesis 12 but that is pretty expensive for a...