Technical data presented here on the manufacture, adjustment, and use of firearms or ammunition inevitably reflects the author's individual experiences and beliefs with particular firearms, equipment, materials, and components that the reader cannot duplicate exactly. Before constructing or assembling firearms, gun parts, or accessories, care should be taken that no local, state, or federal laws are being violated.
The information in this book should be used for guidance only and approached with great caution. Neither the author, publisher, or distributors of this book assume any responsibility for the use or misuse of information contained in this book. It is for academic study only.
Some 12 years ago I designed and built a compact, lightweight 9mm machine pistol which I called the MP82. This was done primarily to determine the feasibility of such a gun since, at the time, the military was soliciting proposals for a new submachine gun. The gun worked well enough, but I redesigned and refined it still further, resulting in another version which I called the MP83.1 didn't get the military contract, although I sold several of the guns to government agencies at later dates. The contract was awarded to Heckler & Koch for a version of its MP5.
Even so, almost everyone who saw my prototype gun liked it and wanted one. So I managed to sell all I could make for the next several years.
In early 1983 I decided a .22-caliber gun based on the overall design of the 9mm gun was desirable. I wanted the gun in an open-bolt version, primarily because it required less parts and labor than a closed-bolt gun, but also because I had hopes of offering a full-automatic version to class-three dealers as well as military and police units.
After a small amount of redesign and refinement, the gun worked just the way I had hoped it would. This, in spite of advice (unsolicited) from a number of pseudoexperts who said that such a gun could never work dependably since cartridge rims, or heads, would hang up under the fixed firing pin and interfere with feeding.
I got around this problem simply by installing the firing pin at the lower edge of the bolt face instead of at the top. In this fashion, the firing pin actually pushed the cartridge ahead of it out of the magazine and into the chamber. It had simply never occurred to any of my critics that such a thing was possible.
This gun, which I called the MP22, was the most popular item I've ever offered for sale. I had a waiting list almost from the start. I built the gun in both full- and semiautomatic versions.
Eventually I sold a bunch of full-automatic silencer-equipped guns to a government agency. They had the idea that these weapons would be ideal for taking out sentries. Although I delivered the guns as agreed, I never got paid. Subsequent complaints and general hell raising on my part resulted in my guns being declared illegal and got me put out of business. But that's another story and dealt with in another book.
While the gun described in this book is basically similar to the original, I have made several changes. None of these are detrimental to performance. In fact, most could be considered improvements over the original
Right side of the MP22A1.
The Holmes MP22A1.22 machine pistol.
design. There is only one threaded union on this gun, as compared to three on the original. The frame, or lower receiver, is folded and welded up from sheet metal; the original was machined from a solid block, which was time consuming, at best. Properly finished, this assembly looks as good, or better, than its predecessor.
The trigger mechanism incorporated into this gun can be considered an improvement, mainly because it allows the use of both an open- and closed-bolt configuration without changing any trigger parts. Switching bolts is all that is required. The two-stage trigger used in the full-automatic version is accomplished simply by adding an extra notch on the trigger bar and an extra spring.
By eliminating the vent holes in the barrel shroud, it is possible to incorporate a silencer, or suppressor, without any additional length.
Although it will be obvious to most readers, it should be pointed out that the gun is composed entirely of wood and steel. There are no plastic or pot metal parts. Even though a number of manufacturers and writers have attempted to brainwash consumers into believing that these materials are superior to wood and steel, most users soon find out otherwise.
It should be noted that the only version of this gun that would be considered legal by federal agencies is the closed-bolt version with a ventilated barrel shroud. The feds will maintain that the open-bolt version is too easily converted to full automatic. They will also say that an unvented barrel shroud version is almost a silenced version already. And if they should catch you with an open-bolt version with a two-stage trigger, you will be in big trouble. As a matter of fact, when the feds find out that this gun can be converted simply by switching bolts, you can be assured that they will try to declare any and all versions illegal.
So as long as commercial firearms are available, I would advise you not to attempt to build any version of this gun. When the government actually tries to take away all firearms, as it seems inclined to do, then may be the time to build your gun.
The Holmes MP22A1.22 machine pistol.
The open-bolt assembly shoivnjust above the gun is interchangable with the closed bolt.
Right side of the MP22A1.
As matters stand today, I must state that this book is for academic study and information purposes only. Likewise, I must disclaim any responsibility for legal problems you may encounter if you fail to heed my warning. Since I have no control over your workmanship or the quality of materials you may use, I must also disclaim any responsibility whatsoever for any accidents, injuries, or safety hazards you may encounter.
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