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to provide a fast, secure, and enjoyable experience. by Clayton, from NE, United States Asked on November 12, 2021
Most AR15 rifles and pistols that utilize a fixed front sight gas block use a .750" gas journal. However, it is not always the case. More than likely you would need the .750" Spikes Tactical ST Micro Rifle Gas Block, but I would still recommend emailing us at Techsales@opticsplanet.com and letting us know what specific rifle/pistol you have. That way we can confirm the exact size of your gas journal.
