Blue Guns are inert training replicas only. They are not real firearms, are non-functioning, and are intended strictly for training and instructional purposes.
�M4 Closed Stock� refers to an M4-pattern rifle configuration that uses a closed (fully enclosed) stock design:
M4 Pattern: Part of the broader M4 family of rifle designs, commonly discussed in military, law enforcement, and civilian contexts. The M4 pattern is known for its compact, carbine-style layout and modular architecture.
Closed Stock: A traditional, fully enclosed rifle stock that provides a solid surface against the shooter�s shoulder. Closed stocks are typically associated with greater stability, consistent cheek weld, and predictable handling compared with open or skeletonized stock designs.
Overall, the term describes an M4-style rifle setup emphasizing a conventional stock design, with discussions generally focused on ergonomics, stability, and handling characteristics. Legal classification and permitted configurations vary by jurisdiction.