problem with timmy detents

[1Shot_1Kill]

i upgraded to the timmy detents on my mr2 awhile ago, but im going through them about every two months. i play every sunday. is this normal? any other type of detent that could last longer and not shear off? the bolt is replaced with a alamo city 2 oring unit and i use a qloader setup.

any thoughts to why i go through detents so quickly