The receiver bears markings and a serial number

and while they are intended for M4 magazines

The Patent Pending Daniel Defense Omega Railï¾™ system is the most exciting rail system to hit the market in years

Includes Barrel nut and screws for easy installation

Produce by Airsoft Masterpiece and Guns Modify

EMG Strike Industries Oppressor w/ Built-In AceTech Bifrost M RGB Rechargeable Tracer (Model: 14mm Negative / Black) trigger The receiver bears markings andFeaturesBuilt In ACETECH Bifrost M Rechargeable TracerImproved illuminator for enhanced BB glow activation for an ultra bright traceSustained ROF up to 35 rounds per secondRechargeable built in Lithium Polymer battery; fully charged battery will last over 22,000 rounds. Open the flash hider and charges via micro USBWorks with green BBs onlyAuto shutoff after idling for 40 minutesFCC, CE, ROHS compliantPrecision CNC machined Strike Industries licensed