M&p15, new comp, help!

[tgriffit]

So I bought a compensator online for my budget build m&p15 sport. Has anyone taken their flash hider off? I don't believe it has a set screw. What sized open end wrench works best? Or is there another tool I should be using?

Thanks for the help!

[Gunsnwater]

Barrel jaws in a good vise, are you asking wrench size because you don't have a set? Get new crush washers the kind that peal. If you get the armorers tool you can use a torque wrench for install of new one.

[eXceLon]

I just used a regular old adjustable wrench.

I didn't have any luck getting the timing right on the new muzzle device, using a standard crush washer. Just couldn't manage to crush it.

Ended up getting this shim kit, which offers various thickness washers that you can mix-and-match until you get the correct timing.

[Gun]

So I bought a compensator online for my budget build m&p15 sport.

The M&P was built by the manufacturer with budget as a primary consideration.

Has anyone taken their flash hider off?

Probably quite a few people have done this.

I don't believe it has a set screw.

No, it does not employ a set screw.

What sized open end wrench works best?

The one that actually fits. If you are removing the old one from the barrel, there is no need to put the upper in a vise block. Lay the rifle on its side, on the work bench (kitchen table), and firmly hold it down while wrenching the FH. FHs are not put on uber-tight.