Magnetic Locking NPAS (CM) Complete bolt carrier for GHK M4 – Black

<p><strong>Features:</strong></p>
<ul>
<li>For GHK AR GBB</li>
<li>CNC complete bolt carrier</li>
<li>with steel nozzle</li>
<li>Better freezing resistance</li>
<li>Saving gas consumption</li>
<li>More consistent muzzle velocity</li>
<li>More smooth BBs feeding</li>
<li>Muzzle velocity adjustable</li>
<li>Patented RA-TECH magnetic locking system​</li>
</ul>