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  1. M

    Mossberg AR15 barrels

    Does anyone have any expereince with Mossberg AR barrels? I am looking at a 16 inch M4 profile and not sure if it is worth the money. Also, as a side note, what benefit does a M4 profile have if you will never have a grenade launcher?
  2. M

    Calibers .25x45, 6.5mmx45, 6mm-6.8SPC, .25-6.8spc, 6.5mm-6.8spc for an upper.

    6.5x45 A question if you don't mind; after all your research what do you think about the 6.5X45? SSK makes ammo and brass and that is one heck of a round. It is also about half way between the 5.56 and 7.62 so it seems like it might be a tad better than the 6 or the 300. I'm building now and...
  3. M

    The AR .243x45 System Project

    Wow, I spent a LONG time reading this entire thread. Thank you so much for putting all this work on line. I am building my first and thanks to your posts I am leaning towards the 6mm. I was debating the 300 as well. I want to keep the gun as much an AR for parts compatability (inlcuding...
  4. M

    Help me understand rate of twist

    I'm newer as well but I understand that heavier bullets require more stabilization. And it is a ratio- 1:12 means 1 complete revolution in 12 inches. So of course, the lower the second number (1:7 the second number being being the 7) the tighter the turn, the more turns per barrel length =...
  5. M

    AR-15 .223REM vs 6.8SPC vs 300AAC Blackout vs 6x45 vs 6.5Grendel vs 7.62x39...

    1st Marine You still there brother? I am wondering, almost six months later, have you any new conclusions? I am building my first AR and am stuck between a 6X45 or 300BLK. I will hunt, compete IDPA and use it for self defence (I won't say SHTF). Your post and thoughts are appreciated...
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