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superlative arms

  1. USK308

    Interesting variance in gas port size

    Semi long post, but good info to share in my opinion) So I recently finished building my 300Blackout SBR (10.5" Faxon Gunner-profile barrel with pistol length gas). First time at the range to dial in the adjustable gas block (Aero Precision), using 100gr A-Max Hornady (had a few boxes I...
    • USK308
    • Thread
    • 10.5" barrel 300 aac 300 blackout adjustable gas block aero precision rosco manufacturing sbr superlative arms
    • Replies: 18
    • Forum: Semi-Automatic Rifles
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