VFC Colt M4A1 RIS II Forging GBBR mulitcam Airsoft Surgeon BBs are competition

Airsoft Surgeon BBs are competition grade with a 5

WarBear 3/5/7 Inch 4-Piece Outer Barrel Set for M4 AEG/GBB (Silver)  CNC Machined Aluminum Construction  Interchangeable Design for both AEG or GBB version of AR15 / M4 / M16 Series Airsoft Rifle  Include AEG & WA GBB adaptors & 3inch / 5inch / 7inch Long Barrel  You can make use of different parts of this package to form different length of barrel into both AR15 / M4 / M16 Series AEG or GBB  Barrel tip end has Anti-Clockwise 14mm Thread  Super rigid construction for high end upgrade user

- 8mm Full Bearing Silver Edge Electric Blow Back Gear Box

02mm+  NOTE: For custom upgrade user

VFC Colt M4A1 RIS II Forging GBBR mulitcam Airsoft Surgeon BBs are competitionHistory of SOPMOD In the year of 1990s, United States Special Operations Command (USSOCOM) start a new program Special Operations Peculiar Modification (or "SOPMOD"), to find a solution for extra requirements of special force infantry weapon, and to assemble all additional combat gears or parts, which allows Special Operatior to configure their weapons to individual preferences and mission requirements. In conclusion, the "SOPMOD M4" were finished.