Buffer Spring and Recoil

[LRRPF52]

If the thermal is not built to take semi auto recoil and secondary reciprocating mass effects, I would send it back for repair or refund. ATN?

Your pixel distortion is likely cumulative from 300BLK before you placed it on the Grendel.

What I found with my LaRue complete rifle is that it uses a carbine standard buffer and spring.

I was thinking I would change that out until I shot it-smoothest AR I have, even compared to my Lilja build with a JP SCS.

I need to put another spring or use adjustable gas with that set-up because I'm getting insane carrier bounce.

I might need another bootleg carrier for the Lilja 318 build.

Also, the LaRue Tranquillo brake on my Stealth 2.0 is very pleasant to shoot-no perceived obnoxious muzzle blast typical of a lot of other brakes, at least for the shooter.

I'm sure you could tweak the SCS with the right spring and weight combo to run the LaRue or any other 6.5 Grendel AR smoothly, but I found it to run amazingly well with the standard carbine buffer and spring.

Keep it lubed and run it lightly wet.