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7/5/2026 3:16:23 PM EDT
[Last Edit: twoisone][Edited]
ETA for resolution: I removed the selector to troubleshoot and found that the detent wouldn't poke through very much. The selector detent hole either had some drill flash or didn't go all the way through on this lower. I ran a 1/8" bit all the way through and it punched out a little sliver of aluminum.

I finally got around to installing the ARC Fire v1's I got a few weeks ago. The packages were identical, but one had the original selectors and one the mil.

I checked the critical measurement on both and they came in at .678 like they are supposed to. The one with original style selectors is really wobbly. There seems to be a lot of play in the selector lever in each position. Both function check fine.

Do I have a detent problem or is this something else?
Get both is the answer.
7/5/2026 5:07:35 PM EDT
[Last Edit: HKH][Edited] [#1]
Shoot it and let er rip!  I’m sure you’re fine

I’ve got all V1 and G$.  They all are bullet hoses


Or order a set of mil spec for 30 bucks.  I can’t stand those slick selectors, all of mine have been replaced.
7/5/2026 5:46:24 PM EDT
[#2]
Originally Posted By twoisone:
I finally got around to installing the ARC Fire v1's I got a few weeks ago. The packages were identical, but one had the original selectors and one the mil.

I checked the critical measurement on both and they came in at .678 like they are supposed to. The one with original style selectors is really wobbly. There seems to be a lot of play in the selector lever in each position. Both function check fine.

Do I have a detent problem or is this something else?
View Quote

Did yours come with the little shim?
Mine didn't and after having a lot of problems as designs sent me another selector lever, the little insert piece and a shim. Helped some.
7/5/2026 6:28:32 PM EDT
[#3]
Did you use the included selector detent?

Did you apply blue Loctite to the selector screws and allow the appropriate time for it to cure?

As mentioned above, you might also need a shim.
7/5/2026 6:51:28 PM EDT
[#4]
Quote History
Originally Posted By StealthyBlagga:
Did you use the included selector detent?
View Quote

I may pull the grip just to check that I didn't mix it up with the one I removed. But I'm pretty sure I did.

The wiggle isn't in the lever moving on the shaft - it's the shaft moving as both sides move together.
Get both is the answer.
7/5/2026 9:50:10 PM EDT
[#5]
If you have a normal milspec parts kit, there is no reason to change the detent.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
7/5/2026 10:22:06 PM EDT
[#6]
Quote History
Originally Posted By krdt:
If you have a normal milspec parts kit, there is no reason to change the detent.
View Quote


If he’s replacing a SuperSafety, he would have to.
7/5/2026 10:25:07 PM EDT
[Last Edit: StealthyBlagga][Edited] [#7]
Quote History
Originally Posted By twoisone:

I may pull the grip just to check that I didn't mix it up with the one I removed. But I'm pretty sure I did.

The wiggle isn't in the lever moving on the shaft - it's the shaft moving as both sides move together.
View Quote


The selector detent should keep the shaft in position.  Maybe check the detent spring protrusion from the grip to ensure there is enough force on the detent. A different grip with a shallower hole would be an easy fix.

I had a V1 that moved enough to cause intermittent stuttering problems. A shim was the fix.

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