18 Comments

  1. T B on August 23, 2022 at 7:50 pm

    Hi Johnny’s Reloading Bench sent me to do my homework.



  2. DEEREMEYER1 on August 23, 2022 at 7:50 pm

    Not that jacking with the torque of the most important and safety-critical "fastener" in an "AR" to "tune" its accuracy and precision period much less doing so by modifying and weakening the barrel nut is even remotely acceptable to anyone with basic mechanical knowledge, education and experience beyond "building" ARs, but assuming doing so weren’t stupid and wrong on numerous levels and for many reasons, going to the "average" torque you’ve "discovered" produces "on average" the "best" results from hundreds of attempts to "tune" ARs into shooting their "best" is not the "best" way to "tune" a new "build" if using a "trial and error approach".

    Starting at the "minimum" so-called "safe" barrel nut "torque" and proceeding from their "upward" to the specified torque even and especially if there is no "improvement" and NEVER "backing off" a previously "torqued" barrel nut on an aluminum upper is the "correct" procedure. Aluminum parts invariably "relax" one "properly" torqued because ALL THREADS PLACE PARTS IN "COMPRESSION" AND THE THREADED FASTENER(S) IN TENSION. AND WHENEVER FASTENER MATERIALS ARE IDENTICAL YOU ALWAYS USE LUBRICANT TO PREVENT GALLING AND ACHIEVE "CORRECT" TORQUE AND FASTENER "TENSION". WITH ALUMINUM YOU TORQUE TO SPECS, WAIT 10 OR 15 MINUTES AND THEN RE-CHECK/RE-TORQUE BACK UP TO SPEC. AFTER THAT HEAT-COOL CYCLES, PRESSURE CYCLES ETC HAVE NO EFFECT.

    SINCE YOU OBVIOUSLY HAVEN’T USED MANY TORQUE WRENCHES IF YOU THINK ANY BUT HIGH-END ELECTRONIC TORQUE WRENCHES "READ" IN SINGLE-DIGIT INCREMENTS, MAKE NO MENTION OF LUBRICATION OR TORQUE WRENCH/SETTING "CALIBRATION" CHANGES AND OPERATION NECESSARY TO ACTUALLY GET "XX" LB.-FT. OF TORQUE "ON" THE NUT WHEN USING A BARREL NUT "WRENCH" WITH A 3/8" OR 1/2" SQUARE DRIVE OPENING FOR A TORQUE WRENCH AND THAT AS AN "EXTENSION" THE LENGTH OF THE "WRENCH" AND EXTRA LEVERAGE RESULTS IN MORE TORQUE ON THE NUT THAN "READ" ON THE TORQUE WRENCH WITH "SIMPLE" RECALCULATION OF THE TORQUE SETTING BEING NECESSARY TO GET "XX" TORQUE ON THE WRENCH AND NUT, ITS NOT SURPRISING YOU’VE HAD TO USE "TRIAL AND ERROR" HUNDREDS OF TIMES TO GET AR "BUILDS" TO SHOOT THEIR "BEST".

    EVERY TIME YOU "BUILD" ONE YOU’RE OBVIOUSLY FLYING BLIND BECAUSE YOU"RE EXPECTING A WHOLE COLLECTION OF VARIABLES TO PRODUCE A GUARANTEED AND CONTINUOUSLY VARIABLE RESULT AND ARE BUTCHERING THE PRIMARY FASTENER TO BEGIN WITH. NOWHERE IN THE MECHANICAL WORLD WILL YOU FIND A SITUATION WHERE SOMETHING IS TO BE "TORQUED" UNTIL "TIGHT" AND THEN IF A "LOCK" OR OTHER ALIGNMENT-CRITICAL PARTS DON’T ALIGN "BACKED OFF" OR "MODIFIED" SO THEY DO.

    IF YOU "KNOCK OFF" ONE "TOOTH" ON THE BARREL NUT THE FREAKING GAS TUBE CAN BE "CROOKED" AND YET "WORK" AND THAT ALONE WILL CAUSE "ACCURACY" TO BE FOR SHIT BUT "IMPROVE" SIMPLY BECAUSE ITS "LESS CROOKED" AFTER "TUNING" THE NUT "TORQUE". BUT IF YOU’VE STILL BUTCHERED THE NUT AND "TUNED" THE "TORQUE" THE GUN STILL ISN’T "BUILT" RIGHT. THAT WHOLE BCG/GAS KEY/UPPER/GAS TUBE "GUIDE" (IN THE UPPER WHERE THE FOUR "FEET" CENTER/SUPPORT IT)/BARREL NUT/GAS TUBE/GAS BLOCK/BARREL EXTENSION PIN "SYSTEM" IS SPECIFICALLY DESIGNED TO MAKE IT ALL BUT IMPOSSIBLE TO ASSEMBLE "LOOSE" AND "WRONG" AND STILL HAVE THE RIFLE "RUN" UNTIL MISALIGNMENT CAUSES THE GAS SYSTEM TO "FAIL". IF SHIT ISN’T ALIGNED "PERFECTLY" YOU’LL HAVE TO FORCE PARTS THAT SHOULDN’T TOUCH AT ALL TO "FIT" AND THE "BARREL HARMONICS" WILL BE SHORT-LIVED NON-FACTORS IN WHY THE THING DOESN’T SHOOT ITS "BEST" AND/OR "RUN" WELL/LONG ENOUGH TO GET A "TEST GROUP".

    The entire rifle was designed to be about as "idiot-proof" as possible but leave it to an "armorer" who can’t find/follow a "service manual" to find a way to fuck up "building" one "hundreds of times" and "teach" other "builders" to just "modify" parts that "interfere" with "torquing" the barrel nut and "tuning" for the "best" accuracy/precision.



  3. Dale Miller on August 23, 2022 at 7:54 pm

    All components involved with chambering a round have WHAT TO DO WITH ACCURACY ? Once a round is chambered and the bolt locked in battery , This is where Accuracy BEGINS . The rounds travel down the barrel with the sights properly aligned to barrel center line , determine the bullets point of impact . Or am I wrong ? All additional parts involved with stripping that round from the mag and chambering that round , have what to with accuracy ???



  4. Cameron Stark on August 23, 2022 at 7:58 pm

    I like how you said flutes @3:24



  5. Tony R. on August 23, 2022 at 8:06 pm

    Great information here. I’m building an AR-10. Do you have a recommended starting torque for my build?



  6. Jim Allison on August 23, 2022 at 8:08 pm

    What a great video where can I purchase a barreled upper from you do you have a web site .



  7. moody edge on August 23, 2022 at 8:08 pm

    Stop saying flash suppressor.



  8. Seek3n on August 23, 2022 at 8:09 pm

    Hi, i have a strike industries gridlok handguard and came with a barrel nut. And ever since i change this handguard my group is so bad (6 inch grouping). Then i saw your video so i started trying to tweak with what your saying reguards to barrel harmonics from 40 to 80 ft/lb. Never got it it did get better at randomly ill hit a bull’seye. So i called the manufacture and ask what the torque spec is on their barrel mut and they said the max ft/lb torque on the barrel nut is 45 ft/lb. Now i wonder if i canted the barrel nut or the barrel nut itself inner flange was always bad. Ive repurchased two of same barrel nut now and 3rd one is on the way.



  9. M.D. Reynolds on August 23, 2022 at 8:12 pm

    Very informative.
    That is a great shirt .



  10. John Howard on August 23, 2022 at 8:16 pm

    Great series, very informative. I was talking with a local gunsmith discussing a new build as entryway to precision shooting he mentioned that precision competition shooters super glue their rifles together once they are dialed in, is that accurate?



  11. B on August 23, 2022 at 8:18 pm

    Where can I find a ar10 upper built to these standards?



  12. Steve Garrett on August 23, 2022 at 8:19 pm

    is there anyway I can get a copy of the 2 part article on barrel extension to upper receiver fit, written for american gunsmithing



  13. Banshee Chapter on August 23, 2022 at 8:21 pm

    Wow, just wow!



  14. Zero Cool on August 23, 2022 at 8:22 pm

    Joe Carlos, do you offer AR15 gunsmithing services to the public?



  15. Prone_ Wolf on August 23, 2022 at 8:25 pm

    Due to these vids which are excellent .

    I have found a upper receiver that has an underfit barrel extension area….

    And with slightly oversized barrels.
    It makes for an thermal interference fit that you need a heatgun to get it on or off(off is harder then on lol).

    Can you see any downside to a fit like this?

    What type of accuracy are you looking for at 100 yards?



  16. Michael Hennessey on August 23, 2022 at 8:33 pm

    Great video! The more I learn the more I realize I have more to learn. And I agree with Jay Bird you sound just like Jimmy Stewart.



  17. Jay bird2963 on August 23, 2022 at 8:35 pm

    good information, by the way you sound just like Jimmy Stewart lol



  18. Dewey Vicknair on August 23, 2022 at 8:39 pm

    Great e-mail address!