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Guns Modify M4 GBBR Gas Block (Stainless Steel) with Length Tube (Tin-Nitride) - Black GM0491Special Price $35.68 Regular Price $42.99 -
Guns Modify Tokyo Marui MWS GBBR Airsoft Outer Barrel (10.5 inch, Steel Light Weight) - (Require AEG Nut) GM0467Special Price $66.87 Regular Price $75.99 -
Z-Parts MK16 Barrel (Aluminum, DD GOV 10.3 inch) for Tokyo Marui M4 MWS GBBR Airsoft - Black ZPS-MARUI-M4-032Special Price $96.89 Regular Price $113.99 -
Z-Parts MK16 Barrel (Steel, DD GOV 10.3 inch) for Tokyo Marui M4 MWS GBBR Airsoft - Black ZPS-MARUI-M4-030Special Price $96.89 Regular Price $113.99 -
Alpha Parts Systema PTW Gas Tube (10.5-14.5 inch, Stainless Steel) Compatible with M4 GBBR (Except Marui MWS) APARTS-PTW029BSpecial Price $4.97 Regular Price $5.99 -
Z-Parts 14.5 inch M4A1 Style Steel Outer Barrel Set for Tokyo Marui M4 MWS GBB ZPS-MARUI-M4-006Special Price $74.79 Regular Price $87.99 -
G&P 1.2 inch Outer Barrel Extension (CW) for M4 AEG GP-BRL045MSpecial Price $4.39 Regular Price $5.29 -
G&P M4A1 AEG Outer Barrel (Aluminum, 12 inch) - Black GP-COP007BSpecial Price $15.29 Regular Price $17.99



