Rocket Airsoft M4 Metal Hopup Chamber Set TM L96 AWS It's a little thicker (square)

It's a little thicker (square) than others

Versatile Compatibility – With the right RIS-mounted adapter

Padded shoulder strap with sternum strap and D-ring

the SR-XL 12" very long AEG packs some great features into an affordable package

Echo1 PSR 10* (CYLINDER IS REQUIRED)

Rocket Airsoft M4 Metal Hopup Chamber Set TM L96 AWS It's a little thicker (square)Rocket Airsoft Full M4 Metal Hopup Chamber Kit SHS TT0083 Comes with all the internal parts needed to operate (adjustment wheel, hopup arm, nub, etc.). CNC Easton 7075 Aluminum construction made. Surface treated for anti oxidation. Newly redesigned in March 2015 to improve the original SHS model to prevent loosening. Very durable and accurate in its bb feeding system. Replaces your original hop up chamber with an easy install. For use with any M4