Stacking 40 dollar moderators

[Roachcreek]

Would this work for 100 fpe on a 28 inch barrel where pressure has dropped due to the volume of the longer barrel.

Take 2 Buck Rail 30 caliber moderators, enclose them in a 1.65 OD x 1.58 ID aluminum tube using JBWeld. On each end place a drilled out 1-1/2” fender washer drilled out for exit on one end and the 1/2-20 on the other end, then encapsulate them on each end with JBWeld glued flanged bushings, 1-1/2 “od x 1-1/4 IDx1/2 length.

In theory the aluminum tube, fender washers and flanged bushings would surround and secure the two buck rail moderators and avoid pressure failure through the side wall and end cap.

But would the interior baffles made of 3d printed plastic hold up to 100 fpe.

Regards,

Roachcreek

 

[MrP]

I have printed inserts that have withstood hundreds and hundreds of shots at 100 - 165 FPE but like you were describing, I have generally kept the baffles secured in a metal can.

Recently I added a printed moderator to an evanix rex P. that is all plastic with no canister. I also modified the shroud so there is a decent volume of space behind the first baffle for air to expand into - the idea being to keep the pressure lower so the ldc doesn’t pop.

I’ve shot several hundred rounds through this, and it has held up fine so I think 3d printed baffles should be up to the task. I used overture pla pro which is supposedly considerably more durable than standard PLA. Smells like maple syrup when you print with it so that’s a plus.