Page 1 of 3 123 LastLast
Results 1 to 10 of 27

Thread: New Project completed 7.62x39

  1. #1
    Join Date
    Jun 2017
    Location
    Colorado
    Posts
    85
    Feedback Score
    0

    New Project completed 7.62x39

    Hola,

    I titled this a new project but all I did was buy a complete upper and swap out a few parts on an existing lower. The complete upper came from Bear Creek Arsenal. The lower is Sharps Rifle Co., the lower parts kit is PSA. Since it is 7.62x39 I have two ASC mags (a 5 and a 20). The sights and hand-stop are UTG. The dot sight is a Sight Mark Ultra-shot R-Spec. The red rail section is by Gotical (Amazon brand). I have a light for it but my handguard is M-Lok and the light mount is Key-Mod. I have a (red) M-Lok/Key-Mod adapter coming that is also Gotical. A QD (red) sling mount, red/black 550 cord sling and a Sight Mark T-3 magnifier are on the list when I get paid. I 500 rounds of Golden Tiger 123 grain ball and want to get to the range but this being 7.62 I have questions that I hope the forum can help out with.

    -I am planning on a 50 yard zero. With this in mind what would the expected point of impact be at 100, 150 or 200 yards?
    -Is there a better zero range that provides little deviation from point of aim/point of impact within 50 yards?
    -How wet/dry should I run a 7.62 upper. My 5.56 AR's like a thin coat to run.
    -Are there any, down the road, useful mods? I have heard that there is an enhanced firing pin that is beneficial, as well as a stronger hammer spring.

    GraciasCode Red.jpg

  2. #2
    Join Date
    Feb 2016
    Posts
    2,296
    Feedback Score
    55 (100%)
    I run a 25 yd zero with 7.62 X 39.
    Assuming 2300 FPS with 123 FMJ that puts me 4.4” high at 100, 2.4” high at 200 and 11” low at 300.
    I use a RD on the gun, so given the mortar like trajectory and no magnification, 300 is my realistic range.

    I run wet, like my 5.56 guns.
    A true "Gun Guy" (or gal) should have familiarity and a modicum of proficiency with most all firearms platforms, as well as the major Food Groups.

  3. #3
    Join Date
    Aug 2007
    Location
    Florida
    Posts
    2,247
    Feedback Score
    14 (100%)
    Quote Originally Posted by gaijin View Post
    I run a 25 yd zero with 7.62 X 39.
    Assuming 2300 FPS with 123 FMJ that puts me 4.4” high at 100, 2.4” high at 200 and 11” low at 300.
    I use a RD on the gun, so given the mortar like trajectory and no magnification, 300 is my realistic range.

    I run wet, like my 5.56 guns.
    Couldn't have said it better.

    Its an AR, run it wet, really wet.
    Same with the 25 yard zero.

    Try and get your hands on some c products mags. They're fantastic and have been more reliable than my ASC and D&H.
    You are a genuine toolbag if you have your EDC "loadout" in your signature line...

  4. #4
    Join Date
    Jan 2009
    Posts
    131
    Feedback Score
    57 (100%)
    C product mags are great. Extended firing pin & a full power hammer spring. H2 or H3 buffer. You can get the tungsten weights & adjust your current buffer. Run it wet

  5. #5
    Join Date
    Jun 2016
    Posts
    362
    Feedback Score
    0
    C-Product mags are now Duramags. Good to know when you search. I use Duramags/C-Product mags for both my AR 7.62x39 AR's.

  6. #6
    Join Date
    Oct 2020
    Posts
    56
    Feedback Score
    0
    I run a 50 yard zero on mine. Haven't shot it enough to confirm drop at different distances, but according to the Strelok app it should be 1" low at 25y, 0.67" high at 100y, 0.83" low at 150y, 4.76" low at 200y, and a whopping 21.65" low at 300y. I don't plan to shoot defensively at longer ranges, and can dial in some correction as needed for longer range target shooting. This is assuming 125 grain bullets at 2365 fps, which should be pretty decent estimates for a 18" barrel and typical ammo. 16" barrel is probably close enough.
    Last edited by Pressingonward; 01-31-21 at 15:17. Reason: Spelling

  7. #7
    Join Date
    Nov 2007
    Location
    Georgia, USA
    Posts
    2,857
    Feedback Score
    0
    Quote Originally Posted by UTShooter71 View Post
    -Are there any, down the road, useful mods? I have heard that there is an enhanced firing pin that is beneficial, as well as a stronger hammer spring.
    I say shoot it. If you have failures to fire, then get the enhanced firing pin. My 7.62x39 Bear Creek Arsenal upper runs like a champ on my M16 lower.

    Get the RZE Unimag. They run 100% and are profiled like regular AR15 magazines. They're on sale for $20 right now.
    https://rossdefensesystems.com/products/unimag

    Here' my high dollar video of them. Shooting starts about half way through.
    https://www.youtube.com/watch?v=ma82EphaORQ

    Finally, get yourself a Maglula 7.62x39 AR15 magazine loader.
    https://www.midwayusa.com/product/1020151626?pid=246323
    Last edited by Bret; 01-31-21 at 22:17.

  8. #8
    Join Date
    Dec 2015
    Posts
    215
    Feedback Score
    2 (100%)
    I've got close to 10k rounds through my PWS MK116 in so many configs. Red dot, fixed 10x, thermal and irons. With my intended use being plinking and hog/coyote control my zero was 40/200 with 123g HP Wolf Polyformance. If you are dork like me and call Wolf to get their BC and then chrono it out with a 3" sight height like my thermal it gave me a great ~ 4" max point blank range for hogs/coyotes. Slightly different for day glass with sight height, but such a great round for a lot of different applications. Piled trailers full of hogs for about .15c/round.....all I did was add a suppressor just runs like a tank. Great free site here: this is my trajectory profile for thermal:
    http://www.shooterscalculator.com/ba...+Create+Graph+
    Last edited by sasquatchoslav; 02-01-21 at 12:01.

  9. #9
    Join Date
    Jan 2019
    Location
    Canyon Ferry MT
    Posts
    229
    Feedback Score
    0
    50 yard zero. 100 yard target with 6 o'clock hold.



    This tracks pretty close to the ballistic calculator. Up 1" at 100, about 4" low at 200, 19" low at 300.
    Last edited by MontanaMarine; 02-10-21 at 14:02.

  10. #10
    Join Date
    Mar 2018
    Location
    2 Hollers over from TNOutdoors9 Hickman County, TN
    Posts
    274
    Feedback Score
    0

    Thumbs up

    Yep, a H2, or H3 buffer minimum. I have a 6.1oz in at least 2 of mine. (I have 3) A 5.4 9mm buffer would calm down the recoil. Mine are all mid length gas.

    Check with BCA, it may already have an enhanced firing pin in it. I don't have a high power hammer spring in any of them. I have had a problem with Wolf Mil-Spec with deep set primers on some of them.

    I have a butt load of spare bolts. I got several just before the WUHAN RED DEATH shortages started. I run these as my primary bolts. https://youngmanufacturing.net/produ...olt-7-62-x-39/ If you want one email Debbie Young and she might give you a "heads up" when they are going to the chrome shop.

    I run the C-Products Defense mags exclusively. Yep, Duramag now.
    Last edited by NQNPIII; 02-14-21 at 18:15.

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •