Wii Tech CNC Bolt Lock for Tokyo Marui Next Generation Recoil Shock M4 EBB Rifles

"This version of the Wii Tech bolt stop for NGRS has definitely been revised. The previous version was the worst and had serious binding issues due to bad tolerances. This “newer” version is perfect. Installed on my build and worked right out of the box with no additional mods. Comparing the new version against the old and I can definitely see major differences in how they’ve starting machining these. NOTE: If you install on a Retro Arms gearbox you will need to round off the “pointed” area of the RA gearbox (near the gearbox screw that is above the mossfet) to allow the bolt stop to move freely. Looks like RA still has some kinks to work out and if you dont round off the point the bolt stop will snag on the point.
Hope this helps!