SA M4 Keymod (SA-F02 FLEX(TM) Gen.2) – Black

<h5>Technical Specifications</h5>
<ul>
<li><strong>Power type:</strong> AEG</li>
<li><strong>Material:</strong> Nylon, polymer, metal</li>
<li><strong>Length:</strong> 795–880 mm</li>
<li><strong>Weight:</strong> 2350 g</li>
<li><strong>Power:</strong> 120 m/s (1.48 J)</li>
<li><strong>Inner barrel length:</strong> 363 mm</li>
<li><strong>Inner barrel diameter:</strong> 6.03 mm</li>
<li><strong>Hop-up:</strong> Adjustable, TDC</li>
<li><strong>Fire mode:</strong> Semi, Full Auto</li>
<li><strong>Barrel thread:</strong> 14-mm CCW</li>
<li><strong>Handguard:</strong> KeyMod</li>
<li><strong>Recommended battery:</strong> 11.1V Li-Po (not included)</li>
<li><strong>Connector:</strong> T-Dean</li>
<li><strong>Battery type:</strong> Crane (Buffer stick, Nunchuk)</li>
<li><strong>Magazine capacity:</strong> 300 BBs (Hi-Cap)</li>
<li><strong>Motor type:</strong> Carbon</li>
</ul>
<h5>Package Contents</h5>
<ul>
<li>Specna Arms M4 AEG rifle</li>
<li>300 BB Hi-Cap S-MAG magazine</li>
<li>Flip-up sights</li>
<li>Spare M90 spring for CQB</li>
<li>Specna Arms stickers</li>
<li>User manual</li>
</ul>
<h5>Warning</h5>
<ul>
<li>Some brands produce <strong>overpowered springs</strong> (e.g. M130 may perform like M140–150) that may exceed the gearbox’s rated durability. <strong>Use only Specna Arms springs</strong>. For other brands, it’s <strong>recommended to use M120 springs</strong> to avoid potential damage from mislabeled products.</li>
<li>When installing a spring with <strong>progressive winding</strong>, make sure the <strong>tighter end faces the spring guide</strong> and points outward from the gearbox.</li>
<li><strong>Never store the rifle with the battery connected.</strong></li>
</ul>