View Full Version : cz-26 semi auto
09-25-2005, 09:21 PM
I recently bought a cz-26 parts kit from centerfire systems and have been toying with the idea of building it into a semi-auto. Besides the 80% reciever, what am I going to need and how hard is it going to be to do this. This will be my first build if I go through with it...
09-25-2005, 09:47 PM
Like all open bolt subguns, you have to convert it to closed bolt. Two common methods are to make it striker fired like an Uzi or adapt an existing hammer mechanism to fit inside the gun. Usually, the ID of the tube is also smaller to prohibit an FA bolt from fitting, or a blocking bar and corresponding slotted bolt can be used like on an Uzi. Try a search over at weaponeer.net, they have some specific info on this conversion IIRC.
09-27-2005, 02:37 AM
Hi merkabak47, I'm glad someone else is interested in the CZ-26.
I posted this over at AR15.com the other day and didn't get any responses. Tell me what you think.
I just got one of these kits and have been thinking about it all day.
It seems do-able if:
1:The front bottom of the bolt was milled off like the UZI's.
2:The bottom-rear of the bolt was welded up, filling in the ejector rod hole and the corner of the bolt cut on the opposite side.
3:The ejector rod was replaced by a rectangular bar welded to the receiver tube with a CZ-52 pistol (Glock ?) ejector pinned on.
This would also double as the rear blocking bar.
4:Use a hammer / fireing pin set up like that used in the SEMI MAC-10's.
5:Use a stirrup trigger bar / Disconnector set up similar to that of the 1911 pistol.
This has the advantage of having no holes in the bottom of the receiver and the trigger pivot welded on where the FA sear hole is but the disadvantage is that whole thing would have to be made from scratch.
6:Weld a second blocking bar at the front bottom of the receiver at the trunnion so a FA bolt wouldn't go into battery(overkill?)
7:Perminatly fix a 5" fake can or flash suppressor.
What do you think? <SNIP>
09-27-2005, 03:33 AM
I had the idea of doing it the same as the semi-uzi with a floating firing pin and a modified AR15 trigger group. THere would be no need for a hammer as the uzi fuctions.
I will be using a reduced diameter bolt and the Prexis semi tube.
09-28-2005, 01:15 AM
How would you solve the problem of the firing pin hole running into the ejector hole?
09-28-2005, 01:39 AM
The same as the UZI the firing pin will be connected to a separate piece.
09-29-2005, 03:10 AM
That's what I was planning to do before I bought my kit, but you can't without severly weakening the bolt.
The bolt to maximize feeding reliability runs deeply through the mag. The top of the mag lip clearance slot is about 4/5 to the top of the bolt face and the bolt face is only a few thousandths wider than the cartridge case. The ejector rod hole is over 1/8inch wide, starts literally right next to the fixed fireing pin at the 4'o clock position and breaks out at the left mag lip slot.
If you drill a hole for the fireing pin, the only metal that would hold the bottom 3/4 of the bolt face on would be half as wide as of the back of a 7.62TOK round, primer not included:eek:
10-26-2005, 12:26 AM
Anyone else want to build it?
10-26-2005, 12:35 AM
Somebody somewhere will get it together on these tube guns.
10-26-2005, 02:16 AM
This project is on the back burner for the moment.
10-31-2005, 07:58 PM
Too Bad. I've got one too, and a semi build seems irresistible. I'm new to these, Too bad the barrel ban is going to make much of my new found hobby go bye-bye.
11-15-2005, 11:07 AM
Anyone know where to get a manual on the CZ 26 ? I have manuals on all my other guns but can not find one for the 26.
01-31-2006, 10:16 PM
Well, I've been trying to get an AR15 HTS to work. Biggest problem is that these bolts are HARD!! Milled the bottom feed lip off, milled a slot for the hammer, Am drilling the firing pin hole. Looks like it WILL clear the ejector. Not done yet, so I'll let you know what happens.
02-05-2006, 10:43 AM
My solution to converting a CZ-24, or CZ-26, to semi-auto.
Before re-welding the receiver together, weld a block at the rear of the welded-in barrel bushing to prevent an un-modified FA bolt from completely intering the completed receiver. If the FA bolt is non-functional in the SA receiver, a reduced diameter tube will not be needed.
Cut off the front of the SA bolt an approiate length to allow for the FA bolt block.
Drill the bolt for a firing pin. Temporarily installing a section of a long machine bolt that matches the ejector hole in the bolt. This is to help prevent the drill bit from moving over into the ejector hole in the bolt when drilling.
Drill a pin hole for installing a cross pin to hold the firing pin in the bolt.
The firing pin could be made from a modified M-16 firing pin.
As the CZ-24 uses a wooden stock, the metal that holds the stock in place will have to be removed. In this location, install a removable home-made FCG housing. Of course, you must make a slot in the bottom of the receiver for the hammer to hit the firing pin. :) I believe a M-1 Carbine FCG will work.
The M-1 Carbine trigger will have to be modified by cutting off the protruding finger section of the trigger. A wire or thin section of metal will be used to attach the trigger to the modified M-1 carbine trigger.
The CZ-24 can be made as a pistol, or as a Carbine. If you make a Carbine, you will have to determine how to attach the wooden stock. I haven't gotten that far just yet in my mental conversion.
I see no reason to make any other modifications to the bolt or receiver. However, removing the sear cut from the bottom of the bolt may make you feel safer from the BATF.
02-12-2006, 12:34 PM
Are the CZ26 parts kits from centerfire cut through the mag well? I have read where some of the newer demilled kits are.
02-13-2006, 10:32 PM
The parts kit I got from CFS was not cut in the ejector/magazine area. They are missing a large section of receiver between the barrel bushing and the ejector port.
Converting these to semi-auto is certainly doable.
11-11-2013, 10:34 AM
It appears this thread has died. With more arts kits appearing it may come back. These would make great pistols and look better without the folding stock. The tube would be a bear for many. The tabs that have to be bent and the 45 degree bend by the bolt slot (may be unnecessary on a semi build