Earmor Hearing Protection Ear-Muff M31-MOD1 (2018 New Version) FG CAM870 The barrel nut thread follows

The barrel nut thread follows Marui AEG and GBB measurement

01mm built for precision shooting (Tight bore)  Precision Inner surface polished  Brass Construction  Suitable for M16A1/ A2/ VN/ AUG+ Series Airsoft Electric Gun AEG Rifle  Choose this barrel to suit your Airsoft model  Perfect for tighter grouping & more accurate shooting  Length : 550mm  Inner Diameter : 6

Length : 872 mm

-- 6mm Plastic Bullet Only

which would prevent ported and muzzle gasses from depositing debris on the lens of the scope

Earmor Hearing Protection Ear-Muff M31-MOD1 (2018 New Version) FG CAM870 The barrel nut thread followsThe Earmor Hearing Protection Ear Muff designed for noise that can cause permanent hearing loss which cannot be recovered. Noise levels above 125 decibels for even short periods of time, can cause permanent hearing loss. Hearing loss and damage occur from a combination of how long you are exposed to noise and how loud the noise is (dB level). Not only they can compress harmful noises up to 82 dBA without dampening all the sounds in the environment