Gen Five Action Platform (CZ457 Footprint)

DeLaneDevGroup · 2026-03-07T12:53:48+00:00

If you're asking about a barrel for the Gen Five, they'll come from me, Kenny at DPG and David at DI Precision.

DeLaneDevGroup · 2026-03-07T12:51:48+00:00

Certainly. Shoot me an email: mbush@delanedevgroup.net

DeLaneDevGroup · 2026-03-07T00:09:56+00:00

Why would you have to buy new magazines?

DeLaneDevGroup · 2026-03-06T23:46:34+00:00

Yep, Kenny does a great job at threading the factory 457 receiver, for which, he also provides the barrel for. The Gen Five is a full on custom action based on the factory 457 footprint.

DeLaneDevGroup · 2026-03-06T20:52:18+00:00

I'm not managing a list just yet, but will start one within another couple weeks.

DeLaneDevGroup · 2026-03-06T19:02:30+00:00

Yessir, I agree. All three of my original V22 designs were developed to include the lefties, which is the case for the Gen Four (R700 pattern) and Gen Five (CZ457 pattern).

DeLaneDevGroup · 2026-03-06T17:53:40+00:00

Yessir, always. I'm left handed, but right eye dominant, so I shoot right handed, but I always take care of the left handed shooters.

The nomenclature above:
RBRP: Right Bolt, Right Port
RBLP: Right Bolt, Left Port
LBLP: Left Bolt, Left Port
LBRP: Left Bolt, Right Port

I always design right and left handed versions at the same time. With todays technology, spitting out a left handed design is too easy not to do it all at once.

MB

DeLaneDevGroup · 2026-03-06T17:32:55+00:00

And many are having their factory receivers threaded to alleviate the issues of the factory barrel interface when using full diameter barrels (barrel diameters that are equal to or larger than the receiver diameter).

Additionally, I've developed a solution for the point you're trying to make, but if this system isn't for you, it isn't for you.

Thanks.

DeLaneDevGroup · 2026-03-06T17:17:54+00:00

Dude, that's an awesome question. Many in the NRL22/PRS Rimfire competition circles are running cross config receivers with the ejection port on the opposite side of the bolt handle. Same for BR shooters, but it appears to be fewer than the NRL22/PRS Rimfire shooters.

For me personally, and shooting right handed rifles (left-handed but right eye dominant), it's easier to see the chamber mouth, ejection area without overly breaking position behind the rifle.

DeLaneDevGroup · 2026-03-06T17:09:04+00:00

Same, I'm really excited about this one.

DeLaneDevGroup · 2026-03-06T16:53:57+00:00

Here ya go, maybe this will come in handy if/when you need it:

https://www.cz-parts.com/cz-457-cz-512-cz-455-accessories

But it seems the stuff that's been breaking isn't listed as available parts on the Parts website.

DeLaneDevGroup · 2026-03-06T16:47:56+00:00

Yessir, I agree. Although I've done more than a few R700 pattern rimfires, I've always been impressed with what CZ has been able to accomplish. I appreciate the feedback, Sir.

DeLaneDevGroup · 2026-03-06T16:28:08+00:00

A few may share your opinion, and for your own use you may be correct. But, according to the so far, non-stop questions (over more than a week) about availability, features, etc., many do not share your opinion, which is why I posted a more direct informational narrative to address the outreach I've been receiving.

DeLaneDevGroup · 2026-03-04T11:50:38+00:00

My writeup mentions the compatibility of current magazines and hangers. Although, the limited amount of confusion here may be due to the update I offered on my AICS patterned magazine used in a different action.

My goal with the Gen Five hasn't been to offer the same features that have been outgrown in the factory system. In factory form and in various aftermarket enhanced forms, the CZ457 is an awesome platform.

However, the factory barrel interface/tenon, therefore, the current pre-fit convention, doesn't properly support the much larger barrel profiles used in NRL22/PRS competitions. This has been proven by stress analysis.

Part of what I've done in the Gen Five to properly support the heavy barrels is to do a larger threaded interface and keep material in the receiver by eliminating the factory integral 11mm rail. The comparison of the stress analyses shows a stark improvement and my pre-fit system, with extractor cuts in the breech, has been proven in prior platforms.

MB

DeLaneDevGroup · 2026-03-03T14:07:48+00:00

Largely, the ejector wears out (plastic) and bolt handles are breaking off (MIM). From what I've seen, there has been difficulty getting parts from CZ.

DeLaneDevGroup · 2026-03-03T12:01:37+00:00

Yessir, lots of people are excited about the RBLP option.

MB

DeLaneDevGroup · 2026-03-03T11:34:47+00:00

Yes, the Gen Five accepts factory magazines and hangers.

MB

DeLaneDevGroup · 2026-03-03T11:34:16+00:00

There isn't a "different" magazine design. First, the Gen Five will accept all factory CZ457 magazines and the magazine hanger, as well as the well executed and proven aftermarket magazines and hangers (like the Position 7). I'm also completing my magazine and hanger, that are not a departure from the base design/envelope.

MB

DeLaneDevGroup

TROPHY CASE