This suppressor is 3d printed in Polycarbonate. It is threaded in M14 x 1.00 Left Hand. This means you install it by turning it counterclockwise. I’ve tested it on the Crosman DPMS SBR, but it should work on the R1, AK1, and many others with this thread pattern. It does quiet down the report, but be advised the automatic action of airguns with that feature will still be as loud as stock. A suppressor will not fix that.
The suppressor is 1-3/8 inches in diameter and about 5 inches long. The threads are hand tapped for a precise fit. The surface of the suppressor is honeycomb patterned for grip and to provide for a better looking finish than smooth 3d printed parts.
This suppressor is not compatible with the A4-P. The threads match, but the airgun will not function properly without additional support for the barrel.
Thanks for lookin’