SA M4 Carbine RL M-LOK Gen2 (SA-F05-RL FLEX(TM) BLDC(TM) HAL ETU(TM)) – Green

<h5>Technical Specifications</h5>
<ul>
<li><strong>Power:</strong> AEG</li>
<li><strong>Materials:</strong> Nylon, polymer, metal</li>
<li><strong>Length:</strong> 760-850 mm</li>
<li><strong>Weight:</strong> 2270 g</li>
<li><strong>Velocity:</strong> 115 m/s (1.4 J)</li>
<li><strong>Inner barrel length:</strong> 320 mm</li>
<li><strong>Inner barrel diameter:</strong> 6.03 mm</li>
<li><strong>Hop-up:</strong> Yes (TDC)</li>
<li><strong>Fire modes:</strong> Semi, Full Auto, Binary, Pre-Cocking and more</li>
<li><strong>Muzzle thread:</strong> 14-mm CCW</li>
<li><strong>Handguard:</strong> M-LOK</li>
<li><strong>Recommended battery:</strong> 11.1V Li-Po (included with charger)</li>
<li><strong>Connector:</strong> T-Dean</li>
<li><strong>Best battery type:</strong> Buffer stick</li>
<li><strong>Magazine capacity:</strong> 125 BBs (Mid-Cap)</li>
<li><strong>Motor type:</strong> Brushless</li>
</ul>
<h5>Package Contents</h5>
<ul>
<li>Specna Arms M4 Flex Gen2 AEG</li>
<li>2× S-MAG 125 BB Mid-Cap magazines</li>
<li>Specna Arms 11.1V 1000 mAh (20C) Li-Po battery</li>
<li>Specna Arms EASY LiPo Charger</li>
<li>Speedloader for mid-caps</li>
<li>Flip-up sights</li>
<li>Spare M90 spring</li>
<li>HAL ETU(TM) programming card</li>
<li>Specna Arms stickers</li>
<li>User manual</li>
</ul>
<h5>Warnings</h5>
<ul>
<li><strong>Some manufacturers’ springs are heavily overrated</strong> (e.g., an M130 can perform like M140–150) and may exceed the gearbox’s rated strength. <strong>Use only the included Specna Arms springs.</strong> For other brands, <strong>choose around M120</strong> to avoid damage from mislabeled springs.</li>
<li>If installing a spring with <strong>progressive/irregular coils</strong>, ensure the <strong>tighter coils face the spring guide</strong> outward from the gearbox.</li>
<li><strong>Never store the rifle with the battery connected.</strong></li>
<li><strong>Never store the rifle with pre-cocking engaged.</strong> Always release the piston forward before storage to prevent s..