TTI AIRSOFT Fixed Outer Barrel for Marui G17 / G18 Gen3 Spec & WE G-Series GBB Airsoft - Type A

This is a great upgrade for TM G18Cs. Two grub screws hold the barrel to the hop unit on each side. The material looks to be some sort of aluminum it's very light. The paint coat seems relatively durable as well. After around 500 rounds, no visible scratches on the front part of the barrel, which could also be due to the fixed nature of the barrel not making any contact with my PGC slide.

Pros:
- Drop In
- Relatively good fitment (kinda)
- Easy to Install, grub screws came with pre-loctited
- Can extend inner barrel to 113mm
- Smoother action overall and especially with 14mm ccw muzzle attachments
- Looks great!

Cons
- The outer barrel sits slightly forward and exposes the hop unit through the back of the ejection port by about 2mm
- I think also due to this on my particular setup, the front vertical edges on the barrel are coming into contact on firing and wearing away at the aluminum. It's very minimal and it's essentially self tolerancing, but if you want 100% perfect fitment, you'll need to modify it somehow