Barrels
.1 reamer pilot of bore diameter or slightly less. Of course, most 9mm and .45 ACP cartridges art-used in full atid semiautomatic arms, but there are also revolvers chambered for these calibers. Just to be on the safe side, go ahead and specify that the reamers are for rifle barrels. It should be noted that the higher priced reamers will usually come with an integral throat reamer, allowing you to perform the entire chambering operation with a single reamer. Many times the cheaf gt er ones will...
Fulllength Bolt
The barrel s used in this project require a retaining ring measuring 1 inch in diameter. Therefore a barrel blank with a minimum diameter of I inch must he used. At present, a number of barrel manufacturers offer suitable barrel blanks for this. Most, in laci. offer such blanks with a 1-inch diameter and a length of 24 inches. Since these usually come slightly longer than the advertised length, it is possible to cut four lull 6-inch-length pistol barrels from one of these even after allowing...
Guns
9mm coirverMon iin l mounted on corntneftitil receiver 9mm coirverMon iin l mounted on corntneftitil receiver Same unit on shop made lower receiver Same unit on shop made lower receiver Finally, after the local market was satisfied I dccidcd to advertise the upper rrr.rivcrr assemblies along with a ma a inc adaptor and magazine in .several national publications. A couple of Run magazines ave them favorable mention, and it wasn't long before a steady market was created. About this time, though,...
Sear Open Bolt
THIS PART IS MADE TROM .125-INCH-THICKNESS, IEAT-TRCATAGLE STCCL. T SHOULD BE MADE SLIGHTLY OVERSIZE AND FITT 0 DURING ASSEMBLY. PIVOT PIN HOi F IS .087 IN DIAMETER. Full automatic lire is achieved by pulling the Lrigger farther to the rear, against the pressure exerted by the U-shaped wire spring located at the rear of the trigger. This causes the forward end dI the trigger to contact a projection loeated on the lower end of the scar, which, if the I rigger is held back, holds the sear out of...
Open Bolt
The open-bolt version should be cut to length with both ends squared. A boh nose is turned on one end if the holt body. Iliis should extend 1 50 inch forward from the bolt body proper and have an outside diameter of .550 inch if used as a 9xiun. The .45 version should be .650 inch. A counterbore slightly larger than the cartridge head is cut .100 inch deep. This should have an inside diameter of .400 inch for the 9mm or 480 inch for the .45. In the center of this, a fixed firing pin. 060 inch...
Lower Receiver
As stated earlier, this book was originally intended to encompass only an upper receiver assembly and magazine adapter, which, when installed on a commercial lower receiver assembly, made possible the pistol caliber conversion. But when it became likely that further manufacture of commercial lower receivers would be prohibited when the so-called rime Bill became law, existing lower receivers escalated rapidly in price. Ihe last time I checked, the asking price Lor one of these had gone from...
Preface
11 my memory serves me correctly it was in early 1980 thai someone suggested lu mc that a mm conversion unit to mate with and mount on an AR-15 ur M16 lower receiver assembly would he desirable. A hit of research on my pari indicated that there was indeed a market For such a conversion. At the time 1 thought it best to use square ruhing for the upper receiver since it was possible to get more weight into a square boll of the maximum permissible length than a round one. A bushing whs welded into...