Magtech/CBC 5.56x45 Ammo 77 Grain Sierra Open Tip Match

$600.00 $580.00
(You save $279.00 )
(57 reviews)
Current Stock:

Magtech/CBC 5.56x45 Ammo 77 Grain Sierra Open Tip Match

Case of 1,000 rounds, new production, non-corrosive, boxer primed, reloadable brass cases


  • Caliber: 5.56X45 NATO - Sierra 77 grain Match King Open Tip Match


  • Sierra 77 grain Match King, Open Tip Match Bullet
  • Pressure per NATO/ MOPI Specs
  • Cannelured Bullet, Staked and Sealed Primers
  • Flash Suppressant Powder for Low Flash Signature
  • Waterproofed per NATO/MOPI Specs
  • Excellent Accuracy. Sub MOA Capable
  • Excellent Terminal Ballistic Performance


  • Muzzle Velocity (FPS): 2,789
  • Muzzle Energy (Ft. Lbs.): 1,330
  • Test Barrel Length: 20.00 inches


  • 5
    Magtech/CBC 5.56x45 Ammo 77 Grain Sierra Open Tip

    Posted by 311 on 23rd Dec 2020

    A++ This is some great ammo folks. It is by far the most accurate ammo that I have fed my AR, at an awesome price. I ordered myself two cases, and it arrived within a week. I was a bit concerned that the ammo would end up dented or crushed, but I must say that I was very happy to see it arrive in tip top shape. Get it while you can, you will not find a better deal! Thanks ARMS UNLIMITED.

  • 5
    Excellent ammo

    Posted by Andrei Stieber on 24th May 2018

    Accurate, clean, consistent ammo. Very good value

  • 5
    looks good!

    Posted by Seth Birch on 9th Apr 2018

    Everything packaged and shipped neatly. Can't wait to shoot!

  • 5

    Posted by RB on 22nd Nov 2017

    Order placed, packed and shipped without a hitch. Price was the best and packaging is beyond reproach. Arrived on time. I have not had time to shoot this ammo but Black Hills is one of if not the best ammo on the market.

  • 5
    Great ammo!

    Posted by Average Joe on 22nd Nov 2017

    Consistently just over half-inch ten-shot groups at 100-yards through HCS Mk12 MOD 1, boringly accurate. At 200-yards the HCS Mk 12 MOD 1 shows five shot groups all under 1.6-inches. Shot through 16-inch mid-length PSA (FN CHF barrel) upper (non freefloat) and returns consistent one-inch five and ten-shot groups at 100-yards.

  • 5
    Best you can buy in 5.56mm NATO

    Posted by nam on 22nd Nov 2017

    I have been using this ammo with my Armalite 18 inch SS barrel 1 in 8 twist rifle. So far grouping 0.56 inch @100 yards. Very accurate ammo. Chronograph shows 2681 feet/sec at 10 feet from muzzle from 18 inch SS barrel and St. Dev. of 20 feet/sec from 20 rounds. Spike's tactical mid length AR15 with 16 inch barrel shows 2657 feet/second with St. Dev. of 41 feet/sec with 20 rounds. For comparison IMI razor core 77gr OTM tested same day showed 2658 feet/sec with St. Dev. of 23.1 feet/sec from 18 inch barrel. Also, IMI from 16 inch mid length showed 2643 feet/sec with St. Dev. of 29 feet/sec. I really like Black Hills ammo. They are the best.

  • 5
    Ammo sale

    Posted by Fergy on 22nd Nov 2017

    I appreciate Arms Unlimited fast, accurate shipping at an outstanding price. I will be buying more things in the near future.

  • 5
    Satisfied quality ammunition

    Posted by Eric Lin on 22nd Nov 2017

    I shopped around online to see who had this ammunition in stock and only a handful of sellers did. I chose Arms Unlimited because they were slightly lower in price and have a good business reputation.

  • 5
    Great SBR AMMO

    Posted by Glenn Arnold on 22nd Nov 2017

    Great performance out of a retro XM177E - GAU5/5A at 100 yards. Best retail price on this ammo anywhere. As always, fast and safe shipping by AU.