M4A1 SOPMOD BLOCK 2 GBBR w/ DANIEL DEFENSE RISII RAIL ACE and BB position is seated

and BB position is seated consistently and repeatedly after each shot and stacks up perfectly

The Hopup Chamber MXW unit is wisely equipped with a self-centering inlet O-ring to ensure the hopup unit is inserted exactly in the center of the 11mm to 11

Quick-change front MOLLE panel

This is because the nozzle length can vary between the same gun model when made by different manufacturers

M4A1 SOPMOD BLOCK 2 GBBR w/ DANIEL DEFENSE RISII RAIL ACE and BB position is seatedFeatures Full metal upper and lower receiver with stamped Colt trademarks One piece metal barrel assembly CNC machined Daniel Defense licensed RIS II aluminum alloy handguard with laser etched trademarks allows for easy addition of any 20mm accessories Flat top receiver makes mounting optics or other accessories easy Adjustable CRANE style stock and polymer pistol grip CNC bolt carrier group with negative pressure blowback system. CNC process with