Classic Custom M4A1 RIS, 150m/s, AirsoftGuns, BY-051, BI-5181M

Professionally upgraded version of Classic Custom electric airsoft guns M4A1 RIS [BY-051/BI-5181M] with muzzle velocity up to 150 m/s. This is not a standard serial production in China or Taiwan, where it is not possible for weapons to be provided with much time, care and attention. Upgrade was provided by our company, which has more than ten years of experience and tens of thousands of satisfied customers.

Designation Classic Custom suggests that the weapon was drawn particularly on high emphasis of good usability of weapons. Configuration requirements for superior performance, lower rate of fire, good durability and reliability. This full metal gun is supplied from the latest edition of which has recently processed metal body with functional dust cover. Modern type M4 with metal RIS handguard, tactical retractable stock (6 setting positions) and a removable transport handle, it is possible to attach different scopes and red dots on the sight rail.

Gun was fitted by parts from SHS, which have become a world leader in AEG upgrades. The following components were used..

Complete cylinder set from the SHS:
CNC metal piston head with the bearing
SHS metal cylinder head M4
Polished stainless steel cylinder M4
Aluminum nozzle M16/M4 - 21.5 mm

Stress parts from SHS:
Precise piston with a steel teeth
A set of classic gears - standard (16:1)
Rotary spring guide for the gearbox v. 2

Performance parts from the SHS:
Long motor SHS - Torque
Spring M130

And the other:
Delayer clip SHS
Metal Hop-Up set M16/M4
Gilded T-Dean connector
Universal MOS FET switching set - type 3D

Basic metal reinforced gearbox was modified by radii and metal chamber of gun was propped by rubber o-rings, which is intended for prevent premature rupture of the gearbox. This problem is frequent for home made upgrade and upgraded weapons mass-produced in China or Taiwan and with strong spring. The weapon is equipped with a spring M130 and added cylinder set and good alignment is achieved performance up to 150 m/s. The weapon is luxuriously equipped with low resistance wiring and silicon MOS FET switch which is with strong springs absolutely necessary, but often manufacturers and retailers underestimated. The package not include charger or battery, we recommend to order types. See recommended accessories tab. The pack is supplied with tactical sling, sling sviwel, cleaning rod, Wind Up Hi-cap Magazine 300rds, tactical grip, 2pc covers on RIS rails and box AN/PEQ 2 (imitation laser sight is used to place battery).