I was at a course recently listening to someone talk about M4’s failing early because of silencer’s and the gas blow back into the BCG. Fact???
To me off the back it seems plausable because of the PRI gas busters.
Thanx rob
Silencers will increase the amount of gas going into the gas system.
This increases cyclic rate and can be a factor towards pre-mature extraction.
Pre-mature extraction is really the root of all carbine gas system problems.
Blow-back is another thing all together.
The gas that the can holds will vent out the front as well as the rear of the can.
The gas venting out the rear does come out through the barrel and you will notice it out the rear of the action on your face.
The gas buster charging handle helps with blowback.
I have gone to 1,000 rds suppressed on my 10.5" rifle before cleaning several times. A can may make the rifle more likely to fail, but if the failure threshold is more than 1,000 rds then it is a non-issue to me.
I do spray the entire bolt carrier wet with CLP before firing, which seems to help matters more than a piston would, but I might be out of my lane with that statement.
Sweet that answerd My question Thanks Guys.
A good tip is to use the heaviest buffer you can find that will allow your rifle to lock back on an empty mag with the suppressor uninstalled if you plan on shooting unsuppressed. If you’re going to have it suppressed at all times, make sure it locks back with the can on.
If you have access to a full auto lower, take your buffer and spring and install it in the auto lower and then install your upper. If it will run in auto the timing will be absolutely right on the semi, burst fire is the crucible.
My dealer uses a 9mm buffer, but I use a H2 just in case I want to shoot unsuppressed (for some ungodly reason).