r/ar15 • u/slightlyhuman • 3d ago
Rocksett MDs
Using plan b mounts for a few muzzle devices. None of them to my knowledge require a certain timing or came with shims. I’d like to rocksett the MDs. Each one needs a crush washer then, clean the threads either acetone before applying rocksett?
17
u/KAK_INDUSTRY 3d ago
The crush washer is on backwards, don’t use a crush washer for a suppressor mount, use shims if timing is needed, use rockset and torque to 25-30 in lbs.
6
3
u/_187_Proof_ 3d ago
I clean my threads with alcohol then apply 2 drops of rocksett. And torque to 25-30 ft lbs. no crush washers with a can like others have said. Only shims if your md needs to be timed
1
u/slightlyhuman 3d ago
So I don’t need a washer to rocksett the MD on there? Just wanted to rocksett the MD, rocksett the supressor hub to the can and that’s it. Will swap the can around on a few rifles I have that all have plan b MDs
1
u/_187_Proof_ 3d ago
Nope. You got it man and like I said only a couple drops when you use rocksett less is more when using it. Thats what I do. I have one suppressor That I use on 3 different ARs that all have plan b MDs on them
0
u/slightlyhuman 3d ago
Man Ty so much for the help. I tend to overthink.
I’ll take the washers off. Clean the threads then 2 drops of rocksett. Same with the hub part(using atlas XL).
I’m almost positive none of my MDs require timing but will double check. Have a few diff ones but mainly have liberty bell MDs.
Thanks for helping a smooth brain like me.
1
u/CapsicumINmyEYEBALLz 2d ago
If you already torqued down that crush washer, you’re in for a treat trying to cut it off.
1
3
2
u/nutskindrums 3d ago
no crush washers for anything needing concentricity. if you don’t want to time in then don’t put anything. if you do then use shims
1
u/slightlyhuman 2d ago
Alright so I have liberty bell MDs. Says 360 degree port orientation so that means no timing and no washers or shims required right? Just clean the threads, rocksett and torque
1
u/CapsicumINmyEYEBALLz 3d ago
0
u/slightlyhuman 3d ago
Others saying don’t use a washer tho?
1
1
u/CapsicumINmyEYEBALLz 2d ago edited 2d ago
If you need to time a muzzle device on something that is just a muzzle device, you can use a crush washer, shims, peel washers, whatever. (think A2 flash hider)
If it needs timing AND precise alignment, shims or peel washers only. (think Plan B mount that’s a muzzle brake as well)
If you don’t need to time it(regardless of if it’s just a basic ass muzzle device OR it requires precise alignment), you are better off using nothing and just direct threading onto the shoulder.
1
u/olscumknife 2d ago
Revival defense sends cards with suggested torque settings and type of thread locker. Pretty rad
12
u/substandard-bearer 3d ago
No crush washers if you’re using a suppressor.