DELRIN BB NOSE M4 21MM NGA (SPBBD2100)

Ball Nozzle with O-ring seal for M4/AR15 platform (“length”), made of POM-C
through precision CNC machining.
Studied in every detail.

Innovative geometry with measurements and tolerances designed for maximum performance
Front bevel designed to fit perfectly with most hopup rubbers
on the market and reduce draft problems.
Outside diameters designed to reduce clearance with most hop-up assemblies.
Sized to align with the barrel better than the competition.
Internal diameter designed to limit play, optimal if used with NGA cylinder head
Lotus, increasing FPS and eliminating inconsistency and drafting issues, especially
data from mid-cap shippers (avoids mid-cap syndrome).
O-ring seat designed with shear and traction analysis to avoid collar detachment
in case of incorrect alignment
Two different sized O-rings to choose from, to optimize sealing and consistency.