Home AR-15 New CMMG 10mm Banshee MK10 pistol! Heck yeah!

New CMMG 10mm Banshee MK10 pistol! Heck yeah!

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The new CMMG 10mm Banshee is the next evolution of their delayed blowback system. The MK10 Banshee in 10mm isn’t gas delayed, but instead uses a unique delay system seen before on their Guard series of firearms. The CMMG Banshee 10mm bring the power of 10mm to the PCC world. It’s not the first 10mm pcc, but it’s one of the ore interesting.

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35 COMMENTS

  1. You are literally the only person I’ve ever heard complain about the cotter pin. It’s super simple to use and does its job. as much as you handle ARs, how don’t you know how to use one by now?

  2. I had the exact same problem with the 9MM banshee. It wouldn't eject the spent round and it constantly would jam. I sent it back to CMMG. They swapped out the BCG and sent it back and I haven't had any problems since..

  3. 10mm is awesome, no doubt… but you can rock a 8”-10” SBR/pistol 5.56 AR and still get 800 Ft/lbs of energy with better range than a 10mm. For survival and the ability to find ammo on the fly, there’s no doubt in my mind that a 5.56 is the way to go even in a short barrel.
    EDIT: and before anyone says that FMJ ball sucks out of a short barrel to justify the 10mm, you’re automatically comparing expensive defensive 10mm ammo to cheap 5.56 ball in which I would reply that you should compare that to 68-75g hunting/defensive 5.56 that will expand and/or fragment out of a short barrel which will match the lethality of defensive 10mm.

  4. So…It does not cycle all ammo well. It does not lock open, with a full mag, w/ all ammo. It does not operate good on "the great glock mags", so they sell it w/ another brand…ok.
    It's 10 mm…."BEST GUN EVER"!

  5. Are there any other guns with that style of delaying action on the bolt? meaning and angled bolt lug. It is very interesting but I would like to see a test of longevity, do the lugs round off and affect function?

  6. 10mm exists because Dornas and Dixon and Norma had compensation issues.

    As originally designed/conceived by Jeff Cooper, 10mm was called .40 Super and was almost the exact same as modern .40 S&W.

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