Mauserlover

Voted banner ads. The Hobby-Machinist Forum (just another forum I use, in addition to the aforementioned Rimfire Central) uses banner ads, but certain features (the search function, among other things) are restricted to those who donate $10 per year or more. New users can see how much the forum is worth before donating, but actually do gain something useful when donating. Maybe a good idea? We'd all have to quit chewing people out for not using the search function before starting a thread though... I am a new member. Lurked for a couple of years. I wouldn't have joined if even $1 was required before seeing the forum. I think you'd lose many possible new members if something was charged right from the get-go.

So... is the hole in the slide tapered to match up with the taper on the barrel, or is it just a square hole? (Square hole? Round hole, with square sides? Cylindrical! Cylindrical hole! Is it a CYLINDRICAL hole?) What exactly is the benefit of a conical lockup if you aren't trying to salvage the barrel for a comp? Tanfoglio Witness Limited has a coned barrel, but no comp. Why? I think I'd still like to have a book so I can successfully overthink this. Is there one?

Aha. So, I'm stuck with what is in my mind, the "easy" way for my CZ-85. I will have to get an extended barrel and thread it and time the comp. What I'm thinking is that I will square up the crown of the barrel, and have a shoulder in my comp so it will only go on so far, then work out my ports. However, if someone has a good resource (book I can buy, youtube channel, other threads, I'm good with whatever) completely explaining cone comps, and cone barrel lockup, I would much appreciate it. I got a Turkish knock-off CZ (Sarsilmaz CM9 Gen2) with the intention of seeing just how cheap I could make a decent open gun. Not knowing about cone barrel lockup at the time, and certainly not knowing about cone comps, I figured I'd TIG (okay, GTAW for those of you who like the new terms here) weld an extension on the barrel to thread for the comp. If I don't need to do that, that would be great! However, do I just use a tapered reamer in the slide? Do I make some sort of setup in the lathe to hold it? Or do I need the hole to be oblong to facilitate the tilting barrel, or is that what the taper is for? What angle of taper is best, or is it a pretty forgiving concept? This is why I need to buy the book. I just don't know what book to get. Thanks!

Okay, also on the topic of, "why not just thread an extended barrel and screw a comp on", here's what I'm referencing... https://www.lonewolfdist.com/Detail.aspx?PROD=919522 This page has a video, that's all I know about this. That and Physics classes all too long ago... They want you to screw their comp onto your barrel and just screw in a set screw. I'm foreseeing problems with the set screw backing out (surprise, surprise). Like you, I'm guessing they don't shoot it all that much. If you were okay with locktite and machining a channel at the bottom of your barrel for that set screw, what would be the problem? What if I machined a shoulder for the comp to stop against? Clocked with shims or machining the comp length down. Would that be better than just stopping with extra thread? From your post, what threads are being damaged? From the set screw, or from stretching due to the compensator wanting to go downrange and held on by the barrel threads? I'm thinking that the threads being damaged by the set screw would be fixed by machining a channel in the barrel for it; and the threads being damaged by the pressure generated by firing would be alleviated by screwing the comp down to a shoulder. Thoughts? Total neophyte here, I understand comps on rifles (where the bolt doesn't usually lock up on the muzzle end of the barrel!), but never thought until a couple of months ago that a comp on a pistol was even something I would ever pursue. I've got a CZ-85 that's undergone and undergoing a bit of a transformation, and at this stage, I'm reluctant to take the bushing out. Probably will happen as I get more experience working on short-recoil Browning based pistols. If anyone has a link or a suggestion of a book I should buy explaining why I should not be scared of cone comps I would much appreciate it. I'm just not seeing the benefit of removing the bushing and fitting a coned comp above keeping the factory bushing and screwing on a comp? I'm probably missing something big, and just don't know it. Any help is appreciated! Just sent a check for my first open gun (thanks to the classifieds section here!) and when I get it in my grubby little paws (strike that, I've been washing them probably fifty times a day recently) I'll probably understand the cone-fit comps much better. Maybe.

Ha! I'm practicing my Dad jokes in case I ever have kids! Thanks for the welcome!

The CR Speed one says that it is for a 1911? Does it fit a CZ fine, or am I looking at the wrong option? I think the DAA one says it will fit the SP-01, at least on the listing I saw. I'm still thinking that the SP-01 trigger guard is the same as a CZ-85 trigger guard. Haven't found anyone saying otherwise. I'm sure the Guga Ribas one is fantastic, but at twice the price... I might be happy to just get my feet wet with a cheaper used one at this point. Where do you folks look for used stuff like this? The classifieds here the best place? Gunbroker? Haven't seen all that much on the 'net.

Is that the normal CZ hole pattern? I'm guessing the Czechmate and TS would be some sort of standard for the folks who manufacture mounts, right? I might even make my own mount, rendering this conversation partly moot anyway. Thanks, the other information about the screws made my mind up about which taps to get!

Do the "universal" holsters actually fit well? Uncle Mike's makes "universal" holsters too... Out of nylon... Sloppyness isn't something I'm happy with in a holster. So, is the CR Speed holster better than the Safariland? Or were you just throwing it out for consideration? Thanks.

Professor Atlas, I don't know if you still follow this thread, but if so, your threads have gotten me into a deep, dark hole with no escape. I am now looking to build a CZ-85B into an open gun (or at least work that way). I've spent too much time searching for this, obviously I'm doing it wrong. CZ hole patterns and Tanfoglio hole patterns are different, right? They are also different hole sizes and thread pitches, right? Where can I find the specs for these patterns? I've looked at C-More's site, Cajun, CZ Custom, etc. Anyone know what it is? I'm not spending $50 on a jig that I don't need when I have a milling machine. If nobody has the CZ pattern, does anyone have the Tanfoglio pattern? Thanks.

Yes, I am aware that real cheapskates don't shoot these sports. New member, so while I think I put this question in the right forum, I will not be offended if it gets moved! Problem number one is that I've got a CZ-85, and finding holsters for -85s at all is somewhat difficult. Finding a race holster is even worse. I'm looking for something that will accept a thumb rest. And I'm not even sure that all the holsters out there for CZ-SP-01s will fit. If you have knowledge on this, please chime in. I know I'm a few years late to the party in modifying base model CZs into race guns, but a cheapskate has to be a cheapskate. Surely someone out there has found a holster for their modified -75B. I'm not really able to break my bank on this, but I'm looking for something cheaper than a Safariland model 014, which looks to me to run about $160. I'm actually really hoping that someone knows of an inexpensive kydex holster maker that makes racy holsters and I just haven't found out about them. I'm planning on shooting Steel Challenge with this, so retention isn't my biggest problem. The thumb rest is. Thanks for your help!

Well, maybe not. I was lured into joining this forum by Professor Atlas' CZ tuning threads, then got sucked into the black hole. I currently shoot Steel Challenge fairly regularly, and multi gun when the schedule matches. Looking forward to learning loads (ha!) of stuff here. Maybe eventually I'll even contribute something useful!