• CSW300 Wide LM8 Upper Receiver | Ambidextrous Charging Handle |
• S-A Bolt Carrier Group | MARS-L PDW Lower Receiver |

The CSW300 upper receiver is mid-length and designed to enclose its combined barrel and suppressor.  The receiver has an 16.5-inch Picatinny top rail while the remaining sides have locating lugs and screw holes. The locating lugs reduce recoil of attached accessories while the screw holes hold the accessory or rail to the weapon.  This system comes with a grip stop installed on the front end to reinforce safe hand placement.

The barrel uses LMT’s Virtual Baffle System technology in its integral suppressor.  The VBS suppressor defeats its competitors in the following ways:

• passes SOCOM’s SURG high-performance stress test
• rated for automatic fire
• minimizes cyclic rate increase
• maintains a lower average surface temperature at one hundred rounds
• minimizes point of impact shift