M1911 Hop Up Chamber Assembly for Marui / KJ / WE Gas Blowback Pistol

Hop Unit and Arm / I Key were exactly as in description, however I purchased this to replace the Hop Unit in a TM M45 A1 the Unit fits fine, but how the outer barrels in the M45 A1 is secured compared to the TM 1911 is different, so I was unable to use the unit for my M45 A1 I ended up keeping the existing hop Unit in the M45 but using the new Hop Arm and I Key from the maple Leaf Unit

Was easy to put together and was a simple drop install pretty much,I'd advise to either ask someone to show you to put it together or watch a video about it but it was pretty straight forward,great product and was a quick delivery