bko 03 zenitram asa, tickler lpr, ergo reg, vapor blot, j&j 2 pc barrel, aka mity max,
Strengths:
stops blow back
helps air efficiency a little
Weaknesses:
none
Review:
if you have blow back get this bolt it will get rid of it.also the bolt fits good in the gun because off the o rings on it. also i think that it is nice that this bolt is not delron so that way you don't have to worry about it swelling.
Conclusion:
if you have blow back on your bushmaster get this bolt you will be very happy
