[mcguyver]

Define alot of kick?

You will get some movement translated to the body of the body of the gun from the piston slamming into the cylinder head. But it is not much.

Excessive movement of the cylinder forward and back is a sign of an under-shimmed buffer cap, or other tolerance issue. If not addressed immediately, it will lead to damage to cylinder and sector gear.

Basically, if it doesn't hurt your hand to slap the stock to split the receivers open, it is shimmed wrong. If you can open it with thumb pressure only on the charging handle while holding on to the lower, it is shimmed wrong. Poor shimming will also introduce an airseal leak which make output reduced and unpredictable.

This can also be a cause for the sounds you are hearing.

Now, tolerances are going to be little different from the base Systema, and this may make rectifying the problem (if there is one) a little touchy.