Safety detent hole too shallow

[Mike14_07]

The safety detent hole is too shallow on one my lowers. What i did was grind the lip off a detent. Does the lip do anything expect keep the detent from falling through with the safety removed?

[CPM]

Who is the manufacturer?

[Mike14_07]

Who is the manufacturer?

Aero but it is a blem lower

[tarkeg]

So you ground the detent instead of snipping the spring? Not that you should have to do either.

[wildcard600]

So you ground the detent instead of snipping the spring? Not that you should have to do either.

How would making the spring shorter raise the detent higher inside of the lower. The OP's problem (if I am reading correctly) is that the hole was not countersunk deep enough from the bottom side and the detent is not protruding into the selector lever notches to engage. Removing the edge from the detent allows it to pass by the countersunk area and engage the notches.

[556BlackRifle]

How would making the spring shorter raise the detent higher inside of the lower. The OP's problem (if I am reading correctly) is that the hole was not countersunk deep enough from the bottom side and the detent is not protruding into the selector lever notches to engage. Removing the edge from the detent allows it to pass by the countersunk area and engage the notches.

^This^

OP; does the detent engage the selector properly? Did you function check the FCG?

[lysander]

How would making the spring shorter raise the detent higher inside of the lower. The OP's problem (if I am reading correctly) is that the hole was not countersunk deep enough from the bottom side and the detent is not protruding into the selector lever notches to engage. Removing the edge from the detent allows it to pass by the countersunk area and engage the notches.

Or, take a 5/32 drill in a pin vise and make the counterbore the correct depth.

BTW:

Left: countersink, Right: counterbore

[tarkeg]

How would making the spring shorter raise the detent higher inside of the lower. The OP's problem (if I am reading correctly) is that the hole was not countersunk deep enough from the bottom side and the detent is not protruding into the selector lever notches to engage. Removing the edge from the detent allows it to pass by the countersunk area and engage the notches.

This is correct. I stepped away from the computer, and when I returned I was thinking take-down detent. Oops.

[Duffy]

If the detent holes are shallow, they will allow the user to over rotate the selector more easily. If your receiver has the selector stops at 3 and 9 o'clock, you would still be able to rotate the selector past 90 degree (FIRE) onto AUTO / BURST position.

Any selector can be over rotated given enough force, but one with shallow detent holes will do so easily. It's an inexpensive part, don't mess with it and just replace the selector.

[Mike14_07]

If the detent holes are shallow, they will allow the user to over rotate the selector more easily. If your receiver has the selector stops at 3 and 9 o'clock, you would still be able to rotate the selector past 90 degree (FIRE) onto AUTO / BURST position.

Any selector can be over rotated given enough force, but one with shallow detent holes will do so easily. It's an inexpensive part, don't mess with it and just replace the selector.

The counterbore on the lower is too shallow