![[AIP] M105 Upgrade Spring for AEG](http://www.sixmm.com/cdn/shop/products/AIP_M105UpgradeSpringforAEG.jpg?v=1616998219&width=1200)
![[AIP] M105 Upgrade Spring for AEG](http://www.sixmm.com/cdn/shop/products/AIP_M105UpgradeSpringforAEG.jpg?v=1616998219&width=450)
![[AIP] M105 Upgrade Spring for AEG](http://www.sixmm.com/cdn/shop/products/AIP_M105UpgradeSpringforAEG.jpg?v=1616998219&width=4096)
Well built and comfortable
Definitely the best purchase for my mp9 the result was promising
I must say that I was not so convinced about using it but it turned out to be very good
Unlike the longer version it cannot house a tracer unit of any kind