Umarex HDR50/TR50: 520 FPS and About 77 J with HPA — Part 3
Part 3 of Z-RAM’s Umarex HDR50/TR50 series: the HPA setup, 520 FPS and about 77 J results, barrel extensions, bundle contents and ZDR50 V2 comparison.
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Umarex HDR50/TR50: 35 J with 12 g CO2 — Part 2
Z-RAM’s Umarex HDR50/TR50 Part 2 compares Z-Extensions and tuning barrels with 12 g CO2, preserving the FPS tests, shot counts and stated 35 J result.
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Umarex HDR50/TR50 Z-Extension Performance Series: Preparation — Part 1
Part 1 of Z-RAM’s Umarex HDR50/TR50 performance series: Z-Extension preparation, 7.5 J and 11 J valve differences, housing work and planned tests.
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