New and restocked upgrade parts for the KWA LM4 PTS Gas Blowback Rifle such as the NPAS System and Recoil made by RA-Tech plus Ambidextroous Selector from PTS Syndicate now at Airsoft Outlet Northwest... "We've just received a restock and some new upgrade parts for those that run the KWA LM4 Gas Blowback rifle.

New in stock from RA Tech are the NPAS bolt and the Winter Type recoil spring. The NPAS bolt is a completed piston with the NPAS internal valve. These feature reinforced construction, with threaded steel set screws instead of blind pins and a reinforced rear seat. The real draw of this replacement bolt is the adjustable velocity.

Using the included tool through the ejection port, the valve can be adjusted in increase or restrict gas flow. This allows for quick adjustments from CQB velocity to Field limits, or for tuning in varying weather conditions.

The Winter Type spring is also designed as a response to weather conditions. The slightly lighter tension of the RA Tech M4 GBB Winter Type Recoil Spring allows for smooth operation even at reduced gas pressures. This should improve reliability when running your GBB in cold weather. We've also found that it reduces the sluggish cycle due to cool-down in mild weather. Our test KWA LM4 was notably crisper in long strings of fire with this spring than versus the stock spring.

In addition to these new parts, we also received a restock on some hard to find KWA LM4 parts. The RA Tech 6.01mm tighbore barrels are back in stock, and we also managed to secure more of the PTS Magpul SSG Ambidextrous Selectors for the LM4."