Fusion Engine HPA Drop-In Kit V2 Gen 3 M4 / M16 ghillie/leafsuit Reticle illumination is provided via

Reticle illumination is provided via twelve levels of brightness

Low and 1/3 Co-Witness mount fits Picatinny rails

Each external side wall of the MSP is covered with 4 rows of reinforced MOLLE loops allowing the attachment of additional pouches such as a single pistol or a wide array of accessories

The Enhanced Rubber Butt-Pad can also be installed on Commercial-Spec MOE/CTR stocks

Weight: 40 g Shipping weight: 300 g

Fusion Engine HPA Drop-In Kit V2 Gen 3 M4 / M16 ghillie/leafsuit Reticle illumination is provided viaDescription The Fusion Engine from Polarstar is today one of the most proven HPA design for airsoft. It was originally released in 2011 and its received reward for Best HPA Engine in 8th Airsoft Players Choice Awards by Popular Airsoft. The third generation of this system continues this tradition and provides the user with one of the best drop in kits on the market. This complete drop in system replaces the whole AEG gearbox with high quality, CNC