G&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Chromic Coating, Set A) reinforce push pin (22-Oct-2014 Update) The first round

(22-Oct-2014 Update) The first round Wire Cutter Rail has been running out

This new product has two power systems

meticulously aligned bearing inserts

visible ejection port will always help

Semi / Fully Automatic shooting mode

G&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Chromic Coating, Set A) reinforce push pin (22-Oct-2014 Update) The first roundG&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Chromic Coating, Set A) Inside (PA) Outside (Chromic Coating) For WA G&P M4A1 Series Come With 2x Polymer Nozzle Set ( Negative pressure operated blowback system ) Design For Replace The Original Bolt Carrier SKU GP WP205A Item Weight (gram) 203 Major Color Silver Built Material Inside (PA) Outside (Chromic Coating) Manufacturer G&P Disclaimer NOTES: Self Installation & Modification (e. g. Sanding)