Upgrade set for Snow Wolf Kar98k rifles

<p>Upgrade set for Snow Wolf Kar98k bolt action sniper rifles. The package include five basic parts to increase performance. Does not require any gun modification.</p>
<p><b> Aluminum piston: </b></p>
<ul>
<li>Unlike the original plastic, it is made of strong and light aluminum.</li>
<li>Provides greater durability.</li>
<li>Six air channels improove sealing.</li>
<li>The optimal diameter of the sealing o-ring ensures a very good seal and thus a high and stable performance.</li>
<li>Length: 79mm, outer diameter: 19.8mm, inner diameter: 12mm</li>
<li>Weight: 19g</li>
</ul>
<p><b> Spring guide: </b></p>
<ul>
<li>Made by precision machining of stainless steel.</li>
<li>Suitable for original SW and upgrade AirsofPro springs</li>
</ul>
<p><b> Spring: </b></p>
<ul>
<li>Made of high-quality spring steel with proper heat treatment and ground ends.</li>
<li>Chemically blackened against corrosion.</li>
<li>The outer diameter of the spring is about 11.3 mm and has a length of 170 mm.</li>
<li>Springs are offered in the range from M130 to M140. According to the customer’s choice.</li>
</ul>
<p><b> Spring guide stopper </b></p>
<ul>
<li>Made of steel with a black finish.</li>
<li>Ensures maximum durability and, above all, precise axial spring guide seat in the cylinder (the original stopper is off-axis).</li>
</ul>
<p><b> Piston sear </b></p>
<ul>
<li>Made of steel with a black finish.</li>
</ul>