Common pratice over here in NZ,try it.
Im surprise "muzzle baloons" or "Muzzledoms" or even "muzzle tape" has'nt been marketed yet! Surprising that nearly every other POS has been, and this pratice acuatually works well and is safe
Damit there goes another millon dollar idea again!!!
Hmmm "patent pending" on tape or even condoms **** aye now theres a legal minefield for some lucky lawer.$$$$$$$
BTW, maybe some clever cookie could post how much PSI there is before the bullet reaches the muzzle. I think even the highest quality tape put on by Chuck Norris wouldnt hold on!