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Thread: Starting a guide rod build.....

  1. #11
    Gunco Member usmc3531's Avatar
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    I drilled mine with a handdrill. the piston is Hard but not impossible, once i drilled the piston i left it on the drillbit and used that to center the bit in the gasblock. If you find another way to guide the bolt you still need a guide for the spring

  2. #12
    aka: SDK1968 dutigaf's Avatar
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    couple of things to throw in for you....

    ive done tons of 9" builds with no guide rod and no problem.

    its all about the cycle distance and keeping it all on track. if the stroke is long enough to get the round on the boltface while keeping the piston in the FSB housing??

    then you dont need a guide rod.

    ive never done 7" builds..

    my builds go from 9" and drop right to 5" & then 3" & 1"

    but there are several different set up s for this & yes you could use a denial bar style set up in the top cover to keep it all in line.

    only reason i never went this route was the covers are so thin and they have a lot of variance in them in there with the spring wanting to ride up and so on..

    when i drill the gas block from the front i actually do it with the piston on the carrier and a dummy round locked into the barrel..

    so it IS where its gonna be. this is the poor mans way of guaranteeing your alignment.

    lots of your super machinists will measure and measure and measure.... but all you really need to do is have it where its gonna be and then keep the holes tight.
    say what you mean & mean what you say


  3. #13
    No Hope For Me 1biggun's Avatar
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    once i drilled the piston i left it on the drillbit and used that to center the bit in the gasblock. If you find another way to guide the bolt you still need a guide for the spring
    brilliant on the piston to align the hole an DUHHHHH why didnt I think of that.

    good point onthe spring. I was up all night one time thinking of ways to move the pistion to one side as well as the reciol spring an asssmble to bea ble to get a scope lowere to the barrel. I hade idea like springs in a AR buffer tube lower down a GB with a carge bar running onthe LH side. dust cover guides for more consistant bolt lock up for accuracy issues an every thig in between. I ende dup designng a m14 oit of it at one point an even considered gas impengment. then I woke up an said screw it KISS. It works good like it is. Id still like the cneter to the piston an the center of the bare closer together. i even had a idea fore a circular piston that went around the barrel an used the barrel to guide it an a gas tube tht went arong the barrel an the pistion an worked as a forend /tube like on a AR. a lot can be done.

    THANKS FOR SHARING HOW YOU BUILD THESE WHEN MY TIME COMES ILL BE ASKIG YOU QUESTIONS SO i DONT HAE TO REINVENT THE WHEEL .

    I HAVE 3.25" BARRELD BULGY 5.45X39 TRUNION SITTING HERE AN HAVE BEEN THINIKING WHAT CAN I DO WITH IT ????? LOL WANTED A 7.62X39 SO I COULD USE A DRUM ( YOU NEED A DRUM TO KILL ZOMBIES RIGHT )

  4. #14
    No Hope For Me 1biggun's Avatar
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    lots of your super machinists will measure and measure and measure.... but all you really need to do is have it where its gonna be and then keep the holes tight.
    __________________

    VERY TRUE .

    THEY SAY JOHN BROWNING COULD EYEBALL A PART HAVE A WORKER TAKE A MIC AN MEASURE BETWEEN IS FINGERS FOR THE SIZE WITH A MIC AN GO MAKE THE PART AN IT WOULD FIT.

    THE HUMAN EYE IS A VERY PERCISION INSTRUMENT.

    i DONT KNOW HOW AMY TIMES IM PUTTNG SOME THING INT HE MILLING MACHINE VICE AN LEVEL IT BY EYE AN WHEN A CHECK IT WOITH A DAIL INDICATER ILL BE .010 OVER 8" . IF IT DONLT LOOK RIGHT VERY OVFTEN IT IS.

    A PERSON CAN SEE A PICTURE FRAM OFF BY LESS THAN A 1/16" ON ONE CORNER ON A TWO AN HALF FOOT FRAME. TRUST ME MY EX WIFE COULD. I REHUNG THAT DAMN THING 3 TIMES AN WHEN IT WAS WERE SHE SAID IT WAS PERFECT THE LEVEL AN EVEN THE LAZER LEVEL WAS DEAD ON. i ALIGN ALL MY BARREL PARTS BY EYE AND HAVE YET TO HAVE ANY NOTICABLE CANT.

  5. #15
    aka: SDK1968 dutigaf's Avatar
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    now thats funny. my "current/only" wife is that way now! :-)


    on the stubs... the way people measure barrels throws a lot of these off.

    do you have a 3" stub TOTAL or 3" of rifling? HUGE difference.

    my ak74 pistol build in my avatar is done on a 3" STUB.. thats overall length! so thats about 1" of rifling. :-)

    ive got a tutorial on the design i came up with for that posted, but will help ya if ya got any questions.

    sdk
    say what you mean & mean what you say


  6. #16
    No Hope For Me 1biggun's Avatar
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    do you have a 3" stub TOTAL or 3" of rifling? HUGE difference.
    ITS JUST OVER 3" TOTAL LENGTH . GOOD POINT ON HOW LITTE LRIFLEING THERE IS MADE ME THINK SOME LOL.

    I STARTED POKING AROUND AGAIN ON WEAPONS GUILD AN THERE IS SOME GOOD STUFF GOING ON THERE.

    I WAS KIND OF THINKING OF DOING A CUSTOM MILLED ONE PIECE RSB/GB THAT MATCHED THE CONTURE OF THE DUST COVER SORT OF. MAYBE IN ALLUMINUM.

    NOT SURE HOW ALLUMINUM WOULD LIKE HOT GAS OR A PISTON WEARING ON IT. MAYBE A SLEAVE FOR THE PISTON. AR GB,S ARE ALLOY SO IM THINKING THE PORT WILL BE OK.

    I HAVE A FEW POLISH (CIRCLE 10 IS POLISH RIGHT) 5.45 FRONT ENDS WITH CUT BARRELS THAT ARE AROUND 3.25" WITH BOLTS AN CARRIERS .

    I CAN EASLY DO ANY OTHER CALIBUR BUT WAS KIND OF EYEBALLING THEM FOR A FUN BUILD. ID LIKLEY HAVE ABOUT $100 IN THE WHOLE GUN .

    WOULD BE A EASY BUILD IF USED AS IS JUST CUT STRAIGHT AN CROWNED .

    ID RATHER DO A X39 BECAUSE IF IM GOING TO KILL ZOMBIES I WANT A DRUM AN A BRASS KNUCLE PISTOL GRIP AN A BAYONET ATTACHEMNET AN MAYBE A GERNADE LANCHER OR FLAIR GUN ON THE BOTTOM . OH YEA A LAZER AN A FLASH LIGHT WITH A RED DOT....

    OK iM SERIOUS ABOUT THE RED DOT AN THE BRASS KNUCKLE GRIP lol

    I HAVE A X39 REAMER SO I CAN MAKE WHAT EVER I NEED JUST LOOKING AT SIMPLE AN FAST.

    WERE IS YOUR TUTORIAL ? i KNOW I HAVE SEEN IT.

  7. #17
    No Hope For Me 1biggun's Avatar
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    THINGS THAT MAKE YOU GO HMMMMMMMM

    LOT OF WAYS TO GO HERE. ID LIKE TO LOSE THE RSB COMPLETLY TO REDUCE WEIGHT JUST USE A TUBE WELDED TO THE GB WITH A PROVISION FOR THE COVER TO ATTACH.
    Attached Images Attached Images

  8. #18
    No Hope For Me 1biggun's Avatar
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    ID RATHER DO A 7.62X25 IN BLOW BACK BUT ITS A LOT MORE WORK. I BOUGHT ALL THE TOOLING AN STUFF TO MAKE A BLOW BACK CARRIER FROM SCRATCH HAVE THE REAMER NEVER GOT IT DONE. SPENT ALL MY TIME MAKING BARRELS IN X25 FOR OTHERS. NOW AMMO IS SKY HIGH SO I HELD OFF.

    I COULD LIKELY BUILD ONE OF THE 5.45X39S IN A DAY. OR A HOUR IF I WANTED TO DO A WELD BUILD ON A 100% RECIVER.

    I WONT DO A WELD BUILD BUT I CAN SEE HOW YOU COULD TAKE A CUT BARREL KIT AN HAVE A PISTOL IN A HURRY. CUT THE CARRER ADD A GB DRILL A PORT MAKE A GUIDE. SOLDER OR WELD ALL THE STTACHMENTS ON. I DONT ROLL THAT WAY BUT IT WOULD BE A EASY CHEAP DOWN AN DORTY WAY TO MAKE A GUN GTHAT GOES BANG

    NOW HERE IS A QUESTION OF THE STANDARD RIFLE ROUNDS 5.45, 5.56 OR 7.62 WHICH ONE IS THE BEST IN A 3" BARREL. I RELIZE THIS IS NOT GOING TO BE VERY ACCURATE. IM THINKING THE 223 ON 5.45 MIGHT HAVE LESS RECOIL AN BE MORE MANAGABLE?????? WAS THINKING THAT 357 AR ROUND ON CUT DOWN AN NECKED UP BRASS MIGHT BE A GOOD ROUND. A 223 WOULD BE THE CHEAPEST TO RELOAD. 5.45 THE CHEAPEST TO BUY OUT RIGHT. 7.62 EASEST TO BUILD FOR ME AN MAKES A BIGGER HOLE IN STUFF BUT MORE RECOIL . SCREW IT ILL GO 308 WIN LOL

    I HAVE A CHEAPO DUST COVER WITH A 22LR TYPE RAIL ON IT THAT WOULD WORK GOOD FOR HOLDING A RED DOT AS A SITE OR JUAT ADD IRONS TO IT.

    IM ALSO WONDERING IF A GUY COULD GET ONE OF THESE TO CYCLE WITH A REDUCED LOAD SHOOTING CAST LEAD BULLETS??????? OR EVEN SUPPRESSED IF WITH SUBSONIC IF I EVER GET OFF MY ASS AN GET THE TAX FORM/STAMP.

    SPEAKING OF WHICH HOW MUCH PORT DID A 7.62 NEED WITH A 3" BARREL AN HOW FAR BACK WAS IT????? ILL BE RUNNING A BREAK IF I DO THIS . MAYBE A BIG PORT AN A ADJUSTABLE BLOCK MIGHT BE A GOOD IDEA. I LIKE THE IDEA OF LEAD BULLETS IN ONE OF THESE. MAYBE LOAD WITH PISTOL POWDER TO GET AS MUCH VELOCITY AS POSSABLE FROMTHE SHORT BARREL.

  9. #19
    No Hope For Me 1biggun's Avatar
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  10. #20
    Scheiße. Mr_Posthumous's Avatar
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    Circle 10 is Bulgarian.

    I cut the RSB up so it would still be usable as the dust cover retainer in the front, and cover the guide rod/piston between the cover and the gas block. I will post some more pictures of the build progress as i go along, too.

    Wont have much time in the garage for a month or so. Having a 'procedure' that a grown up will have when both he and his wife have the amount of kids they want, and dont want any more. Wish me luck. Any advice from those that have gone before?

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