PDI Rifling Barrel Set for Tokyo Marui M1911A1 GBB Pistol (PH stamp) Net-Weight-(g)_1020 it is acceptable when artificial

it is acceptable when artificial environment media is unavailable

so it's an

It equipped with two side mil-spec rails and top rail for mounting red dot sight or other aiming system

Suitable for Tokyo Marui M4 MWS Series Airsoft Gs Blow Back Rifle

Although the overall length is shorter than the conventional rifle

PDI Rifling Barrel Set for Tokyo Marui M1911A1 GBB Pistol (PH stamp) Net-Weight-(g)_1020 it is acceptable when artificialPDI Rifling Barrel Set for Tokyo Marui M1911A1 GBB Pistol (PH stamp) Steel Construction All CNC machined and black oxide finish Suitable for Tokyo Marui M1911A1 Series Airsoft Gas Blow Back GBB Pistol This bushing close to real one.