Advantages / disadvantages of the "open slide"-design

limnophile said:
Walt,

You could ask Beretta USA directly: http://berettausa.custhelp.com/app/u...t/redirect/ask.

Let us know what they say.

Heck, you went to the trouble of finding that link, why didn't YOU ask them and share their response, here?

To me, that would be like asking Glock about "Glock Perfection," or CZ about their "most widely used handgun" claim... I would be skeptical of any response. I'd rather hear from someone who used or has tested the weapons, is unbiased and doesn't have a dog in this technical discussion/fight. Do you know of any such person or group? Or a source for some a head-on evaluation? Participants here sometimes seem to uncritically rely on claims and advertising points from the manufacturer on many issues.

Reviewing the available information from the original DoD Pistol Competition isn't particularly revealing. Lots of information out there about the guns makers that didn't compete, and why S&W was wrongly kicked out of the competition, but not much about the actual observed performance of the weapons from the two firms that did compete: SIG and Beretta.

I also found some General Account Office reports on the claims and counter claims following the award of the contract, and their (the GAO's) analysis of number of slide, frame and one barrel failure as the Berettas were being field tested by the Army and Navy after acceptance. All of those problems were quickly resolved.

I believe that the Berettas are just as reliable as the other guns that were then or are now considered Beretta's competitors -- S&W, SIG, Glock, CZ, H&K, FN, and maybe Ruger or Steyr -- but have seen nothing to make me believe Berettas are MORE reliable, in regard to ejection or any other area of function or performance.

Do you have evidence that supports the claim that they are more reliable, or are you just relying on input from Beretta's marketing machine?
 
Afterthought...

In doing some related reading on the 'net, I found that Clint Smith (of Thunder Ranch), Bill Wilson, and Ken Hackathorn all think Berettas are among the most reliable guns.

Wilson may have a dog in that fight -- since he's selling "improved" Berettas, now -- but Smith and Hackathorn arguably don't. And, trying not to be snarky -- it could just be that Wilson is selling his upgraded Berettas because he thinks they're good, reliable guns that can be tuned to a sufficiently high level to carry the Wilson imprimatur.

I'm still not entirely convinced, but...that sort of feedback comes closer to the non-advertising-sourced info about reliability I've been looking for than what I've seen in these discussions.

.
 
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While it may be difficult to prove that the open top slide of the 92 is an aid to clean ejection it is most certainly true that it don't hurt it.

I encourage fellas to look at the slo-mo pics of the 92 ejecting.

A point about the Petter design lock up was made earlier in this discussion:

The reason pistols such as SIG and Glock have the oversized ejection port is the Petter improvement did away with the internal slide lugs of the 1911 and used instead a squared off barrel at the chamber to fit the ejection port. This accomplishes the same thing as the original internal slide and barrel lugs. This is really more of an ease in manufacturing than anything else, and has not one single thing to do with more positive or reliable ejection.

I believe the statement is true as far as it goes. Meaning that the Petter lock-up was not done with the purpose of increasing the size of the ejection port. But a larger ejection port does increase reliability by decreasing the possibility of port related jams.

The lowering of ports on 1911s began in the 1930s as part of custom touches for competition guns. This was one of a number of modifications done to increase reliability with a wider variety of loads beyond just ball ammo. The modifications evolved some over the years. Nowadays you buy a 1911 you expect a gun with a lowered and flared ejection port. The lowering helps reliability and the flaring largely helps reloaders I believe.

Many books and articles on custom work make this point, from Nye's old book, to Layne Simpson, Wilson, etc.

Jerry Kuhnhausen makes the point on page 133 of Vol. 1 of his manuals on the 1911:

"Enlarging the ejector port size, and thereby increasing shell clearance, is even more helpful, since the empty shell is guaranteed a completely unobstructed way out.

The combination of porting work, a well fit extractor and a positive ejector, virtually eliminates port related jams.
"

I think Beretta placed an open top slide on their gun because that's been their trademark look for decades. There is no actual evidence that it impairs functioning or reliability of the gun in harsh environments. It's done well in those. There may be no hard evidence that it aids in clean, trouble free ejection...but it certainly don't hurt.

It seems hard to build a gun in 9mm that does not function well. You'd likely have to put more effort into it to make a poor gun than the effort to make a good. The 92 is a good gun. It has no trouble jecting.

tipoc
 
tipoc said:
I think Beretta placed an open top slide on their gun because that's been their trademark look for decades. There is no actual evidence that it impairs functioning or reliability of the gun in harsh environments. It's done well in those. There may be no hard evidence that it aids in clean, trouble free ejection...but it certainly don't hurt.

If a larger ejection port to help ejection were the sole reason for it's existence, it could have been done with a much less open slide... just extending forward an inch or two more toward the sight. Let's assume it helps (maybe with stove pipes), which I think can still happen -- but does no harm.

I suspect that the point above, that the open slide has been a "trademark look for decades" may play a bigger role in the open slide's presence than most imagine.

Even the very early Beretta Model 1915 (left, immediately below), which had a conventional ejection port, had the open slide... But the M1923 (to right of the M1915) Beretta went whole hog. I'm not sure that all subsequent Beretta semi-auto shared that features, but many of them did. Maybe it IS a trademark look!

Berettas_zpsgwn7tucs.jpg


Browning, the Marketing firm, importer, and sometime gun-maker (and not John Moses B.), apparently didn't consider the open slide to be critical. Their version of the Beretta design, the BDA in .380, had a conventional slide -- but no reputation for being a jam-prone gun. The Beretta is to the left, below, and the Browning on the right.

21351777-237c-4a90-b546-ddce0877f00c_zpsy8ecvuag.jpg
 
Heck, you went to the trouble of finding that link, why didn't YOU ask them and share their response, here?

I almost did, but the need to register and expose my e-mail to further spam stopped me.

I did find a link to a recent Army Times article preview where Beretta is saying the Army never passed on any concerns about the open-slide design, and indicating that they regard the design as integral to the pistol's proper function, but one has to subscribe to read further. There must be a reason for the design, as it has been used across multiple models in several calibers for decades. I assume Beretta would be happy to share its reasoning. Whether or not such reasoning makes sense would be up for debate, unless they also had and were willing to share empirical evidence of prototype performance with and without the open-top slide.
 
it could just be that Wilson is selling his upgraded Berettas because he thinks they're good, reliable guns that can be tuned to a sufficiently high level to carry the Wilson imprimatur.

I read an article (sorry I didn't save the link) about the US Army Pistol Team shooting highly modified M9s in bullseye competitions. The modifications appear to take great skilled labor, but usually yield a pistol that shoots sub-1.5-inch, 10-shot groups at 50 yd. Isn't that a bit better than what a typical M1911A1 modification can achieve? One of the modifications involves removing a bunch of mass from the hammer to prevent the force of the hammer drop from driving the muzzle downward.

I was under the impression that the Army Pistol Team was still shooting modified M1911A1s. That they are using M9s seems to attest to they're quality.
 
Limnophile said:
I read an article (sorry I didn't save the link) about the US Army Pistol Team shooting highly modified M9s in bullseye competitions. The modifications appear to take great skilled labor, but usually yield a pistol that shoots sub-1.5-inch, 10-shot groups at 50 yd. Isn't that a bit better than what a typical M1911A1 modification can achieve? One of the modifications involves removing a bunch of mass from the hammer to prevent the force of the hammer drop from driving the muzzle downward.

I was under the impression that the Army Pistol Team was still shooting modified M1911A1s. That they are using M9s seems to attest to they're quality.

I've seen a number articles over the years, some photo heavy, about the Marksmanship Unit Pistol Team's guns -- and the gunsmiths who built them. (They shoot anything from .22s to custom shotguns...)

The Army put a LOT of custom work into those guns -- and I suspect the same effort put into any reasonably well-designed gun would give very good results. The Marksmanship Unit has been using Berettas for a long time -- beginning not too long after Berettas became the standard handgun for most Army personnel. The inserted dialogue below shows that it took the AMU's gunsmith over a full year working on nothing else to get the guns about where they should be. Think about that: it would have been bad ju-ju image-wise for the Army to use anything else, i.e., "we think the M9 is great for our soldiers in combat, but we use X when we're competing internationally..."

There have also been a number of articles in various gun mags over the years about the Army gunsmiths -- some of whom have retired and who now create custom guns, Berettas among them, for the civilian market.

Here's a link to an interesting discussion about the AMUnit's Berettas and what was done to make them so darned accurate. Much of it is top-notch gunsmithing, and that's probably a big factor in the gun's performance. As to the Beretta's fundamental accuracy: The P226 was also in the competition, and had it been accepted, I would expect something at least as good as the P-226 X-Five in 9mm to have come out of the AMU's gun shop. The AMU's gunsmiths could probably make a Hi-Point (which can be surprisingly accurate) look like a world-class gun, too. It would probably still be ugly, though. :rolleyes:

More than the gun, I think it's the shooters and the gunsmiths that really make the difference when it comes to the AMU's stellar performance.

Here's a link to a discussion on another forum that is the source for the citation, below. It is the source of the quoted material, below. It addresses the gunsmith's role in the unit's performance. http://forums.vwvortex.com/showthread.php?4029299-extremely-accurate-pistols-let-s-see-em!&p=51483215&viewfull=1

Though Master Sergeant David E. Sams’ modifications to the Service M9 were developed for exclusive use by the AMU, it is interesting nonetheless to see what can be done to the Beretta to make it shoot.

Let’s skip the main course for now and get to the dessert: A tricked-out AMU M9 shoots 0.875-inch groups at 50 yards with factory match ammo. That’s right. Just over 1.5 MOA from a handgun. Even the best 1911s shooting tweaked handloads can’t do better, and most .45s can’t approach that level of accuracy.

What’s the secret, and why hasn’t anyone else been able to work out the Beretta’s bugs to this level?

You’ve got to give full credit to the Marksmanship Unit,” the 39-year-old Sams said. “The unit commander called me into his office and told me to make the M9 fit for competition. About a year later, it was ready. But I didn’t have to work on anything else, and I could order or build whatever it took to get the gun right. I can’t think of a commercial gunsmith who could dedicate a full year to a single project. They’ve got to eat.”​

Its a good discussion with a lot of details in the responses. The key question asked but not directly answered is "why hasn't anyone else been able to work out the Beretta's bugs to this level?" Good question: why haven't others also done so?

Sams, the AMU gunsmith above, apparently had a no-limits budget and no time constraints. Even the best (for profit) custom gunsmiths don't have that much freedom to improve a gun -- it can take them YEARS of testing and innovation to get there from here, and as Sams notes above, they've got to pay the bills in the meantime.

It looks as though Bill Wilson (of Wilson Combat) is giving some thought to the Berettas. Note, too, that Bruce Gray has already addressed the P226 (and other P-series guns, including the P320.)

David Sams, the gunsmith mentioned above, is now retired and offers his services to the public. Here's a link: http://www.samscustomgunworksusa.com/
 
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The open slide design does make it easier to load individual rounds by hand should magazines be lost or damaged. Beretta literature also states that the extractor is designed to accomplish this feat. So, the most commonly used benefit of this design is direct chamber loading, think +1 without topping off the mag.

Also, I have an older Book of Beretta by Massad Ayoob in which he states that Bill Wilson recommends the M9 for out of the box, no time to test, reliability. Copyright 2005, at least a decade before he had skin in the game.

I am also of the mindset that the open slide design allows dirt and debris to clear the weapon while the locking block/ pistol action is buried safely in the frame.
 
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