Nine Ball "Non-Recoiling" Two-Way Outer Barrel for Elite Force GLOCK 19X Airsoft Gas Blowback Pistols
(Color: Silver)

"Fit perfect in my Elite Force Glock 45, I went with the silver finish which is VERY reflective and shiny but looks amazing. The inner barrel and hop up fit like a glove inside with no wiggle at all. This is an absolute must have for those who wish to attach a muzzle device to their G45/G19X since most of the recoiling (stock style fitment) threaded barrels will give you nothing but trouble in doing so, and the only other option for a threaded non recoiling barrel is the Unicorn airsoft one which has iffy reviews across several sites. The option to choose between the threaded tip or the non threaded tip is also a very nice touch, and both tips include o rings to insure ease of use when swapping them.

PROS -

•Fits 19X or 45 perfect out of the box
•High quality machining, durable with no rough edges, marks, etc
•Includes threaded and non threaded tip both with o rings

CONS-

•High price tag (though worth it in my opinion due to both the quality and the lack of other reliable options)

"So after reading the other review I knew I had to leave one of my own . So the outer does come with 2 adapters, both came with O-rings ( already installed ). The overall feel of the outer is super sturdy and light weight . Very easy to install . When tightening the screw to the hop up as soon as you feel tension “STOP” this is just to secure the hop up , not to make new holes . Don’t forget to use some lubricant on the outside before installing. I added a RWA comp and this thing has shown nothing but excellent results. Over all well worth the money compared to your only other option with the new unicorn outers that just don’t live up to the hype .

"Fits great with VFC Glock 45. Really easy installation, if you don't know how you can just look on YouTube. Works great, I can attach my tracer unit to it and it runs smoothly. Only issue is because I didn't install with loctite on the set screw, it came loose. I tightened it back up, but accidentally stripped the screw head off, so now the set screw is stuck in with no way to loosen. If you ever need to replace the screw, it's an M1.6x8 screw. We'll see if I'm able to fix this next time I clean the gun. Until then, it should work. Slide does cause wear on the metal, thankfully not as ugly as the scraping on the stock black barrel but still noticeable. I haven't had it long enough to give a thorough review on durability.

TLDR: M1.6x8 screw (If you ever need to replace it)
Use loctite and don't strip the screw!
Looks pretty and allows you to use tracer with it