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Chamber holder for DOUBLE BELLTTI type AR-15.
It suppresses the rattling of the chamber and fixes the front and rear position.
Since the distance to the mechanical box can be kept constant, the initial velocity can be stabilized by using an appropriate nozzle.
I made it for my M4, but not all M4s.
MJF is more durable than ABS and can be fixed firmly, but since it is made tight in size, it is better to adjust it by scraping it with a leutor or the like.
Corresponding air gun model
DOUBLE BELL TTI TR-1
Ace1 Arms drum type A-HCG2-M4P
You can check the details of how to install it on the blog.
In the blog, it is output by ABS.