Running a 10.5” AR pistol means dealing with velocity loss, which can weaken the performance of standard 5.56 rounds like M193, M855, and 77-grain HPBT. These rounds rely on high speeds to fragment or expand properly—something that shorter barrels just don’t provide.
The HOP Munitions 62-Grain REX is purpose-built for short barrels, ensuring reliable expansion, deep penetration, and superior energy transfer where other rounds fall short. With solid copper construction and optimized ballistics, it’s the best choice for home defense, hunting, and tactical applications.
Want to know why the 62-Grain REX is the ultimate ammo for your AR pistol?
Click here to read the full article!
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