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PPS43-C IS BACK!

GENERAL DISCUSSION

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#1 JESS1344

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Posted 22 September 2017 - 02:51 AM

GUYS,
RECENTLY BOUGHT A COPY OF THE 2017 ISSUE OF AK47 MAGAZINE, AND ON PG. 14 IS AN ARTICLE ABOUT THE RETURN OF THE PPS43-C.

SEEMS AS THOUGH RADOM HAS CAUGHT UP ON ITS MILITARY CONTRACT WORK, AND HAS RESUMED PRODUCTION OF THE PPS43-C.

ALSO JUST FOUND ANOTHER ARTICLE ON THE '43-C, AND RADOM IN THE SEPTEMBER 2017 ISSUE OF FIREARMS NEWS (FORMERLY THE SHOTGUN NEWS).

I LOVE MINE, HAVE A SCOPE RAIL MOUNTED ATOP THE BARREL SHROUD, WITH THE SIG 1X RED DOT FROM MY 556R.

FROM THE BENCH, IT IS SUPERBLY ACCURATE, SHOOTING JUST OVER A 1" 5RND GROUP AT 50YDS, WITH THAT RED DOT AND S&B FMJ.

I CUT OFF THE FRONT SLING LOOP, AND BOLTED A MIDWEST PUSH BUTTON SLING MOUNT THROUGH A COUPLE OF THE COOLING HOLES, JUST AFT OF THERE.

AN ERGO HAND HOOK, MOUNTED ON A SHORT SECTION OF MIDWEST RAIL, AGAIN THROUGH THE COOLING HOLES,COMPLETES THE FRONT END MODS.

STILL FIGURING HOW/WHERE TO MOUNT A REAR SLING MOUNT; I'D THOUGHT ABOUT ANOTHER MIDWEST PUSH BUTTON MOUNT ACROSS THE REAR OF THE UPPER RECEIVER, BUT DON'T WANT TO MESS UP THAT SPOT IN CASE I CAN EVER CONVINCE SOMEONE TO DESIGN A "WRIST BRACE" MOUNT FOR IT, NOW THAT ATF SEEMS TO HAVE UNFUCKED
THEMSELVES ON THAT.

I SHOOT THIS LITTLE BEAST SAS/MP5K STYLE, USING A MODIFIED BUNGEE SLING, MODIFIED AND MADE BY ARMAGEDDON GEAR.

THE ONLY PROBLEMS I'VE EVER HAD WITH THIS THING, ARE TO DO WITH EARLY BOLT OPENING.

IT'S AN UNLOCKED BLOWBACK, AND THE BOLT HAS LOST SOME OUNCES OF WEIGHT, IN ITS TRANSITION TO CLOSED BOLT OPERATION, PLUS THE BOLT IS NOW STARTING FROM A DEAD STOP, INSTEAD OF THE RECOIL (CHAMBER PRESSURE) FORCES HAVING STOP AND REVERSE THE BOLT WHEN FIRED IN THE ORIGINAL OPEN BOLT CONFIGURATION.

ALL THAT COMBINED, RESULTS IN THE BOLT OPENING EARLY, TO THE POINT THAT BRASS CASED AMMO SOMETIMES HAS VERY LITTLE SHOULDER LEFT, AND THE PRIMERS ARE POOCHED OUT A BIT.

I'VE FOUND THAT THE USE OF STEEL CASED AMMO, WITH HARDER MIL-SPEC PRIMERS (RED ARMY STANDARD) FIXES THIS.

STILL, IT SHOULDN'T DO THIS, AND THE FIX WOULD BE A HEAVIER RECOIL SPRING, I WOULD ESTIMATE ANOTHER 3 1/2LBS.

AS THE FACTORY SPRING APPEARS TO BE FULLY COMPRESSED, AS IT IS, WITH THE BOLT TO THE REAR, THE ONLY TWO POSSIBLE SOLUTIONS, AS FAR AS I CAN SEE, WOULD BE TO GO TO A STRONGER ALLOY, OR GO TO A GLOCK TYPE FLAT SPRING, GIVING MORE ROOM, WITH THE SPRING BEING MADE BY ISMI, OUT OF THEIR CHROME SILICON ALLOY.

ANY OF YOU MECHANICALLY GIFTED TYPES WANT TO DESIGN A WRIST BRACE MOUNT, AND MODIFY THE RECOIL SPRING ASSEMBLY WITH A GLOCK/ISMI SPRING, HMMMM??

JESS1344

#2 GunFun

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Posted 13 October 2017 - 05:42 PM

A heavier spring won't do almost anything, but make it harder on itself.

 

Changes in mass are far more significant, because the resistance is a function mass times acceleration squared. Doubling the spring rate is inconsequential to the multiplied holding power of mass. 

 

Read this http://www.orions-hammer.com/blowback/


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#3 Rhodes1968

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Posted 13 October 2017 - 09:48 PM

Excellent write up


Had the Japanese got as far as India, Gandhi's theories of "passive resistance" would have floated down the Ganges River with his bayoneted, beheaded carcass. -- Mike Vanderboegh.





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