Retro Arms CNC SOPMOD M4 NGRS Gearbox 8mm pre build Build Specs ect

Build Specs ect

5 joules we needed proper air volume installed a Real Deal 75% steel cylinder

Upper and Lower

Bottom of page will contain gearboxes tested

Minimum Safety Distance is 5M -  All Smoke Devices should be handled with care

Retro Arms CNC SOPMOD M4 NGRS Gearbox 8mm pre build Build Specs ectRetro Arms CNC gearbox for TM NGRS SOPMOD M4 AEG. When it comes to building a reliable high tier NGRS, this gearbox should be your first item in your build. With the stress of recoil, you need to have the strongest gearbox possible. Precision machined from a block of billet EN AW 7075 T651 aluminum Durable anodized finish Reinforcement in key stress points to counter rapid wear from high performance parts Pre radiused cylinder windows helps evenly