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AR15.COM
8/7/2026 8:58:50 AM EDT
I've got a gen 1 S&W Shield and wanted to get an red dot for it. I found an optic cut slide, rather than have my original slide milled. I've never done this, but I assume that replacing the slide is like replacing a bolt in a bolt gun and I should have the headspace checked?

Am I overthinking this, any issues just taking it out and shooting it?
8/7/2026 9:20:19 AM EDT
[#1]
You’re over thinking it.

Replace and shoot it.
8/7/2026 9:37:18 AM EDT
[#2]
Slap the new slide on and blast away.
8/7/2026 11:14:19 AM EDT
[#3]
the belt and suspenders approach to that is to make sure that the used barrel doesn't bind in the new slide.

Is it a already built slide, or are you going to have to move parts over?

That's all easy, but the sights can be a PITA without a mover.
Hell yeah I got a badge and I got balls like Death Stars, let's do this.

Tennessee Squire
8/7/2026 1:39:53 PM EDT
[#4]
Quote History
Originally Posted By rebel_rifle:
You’re over thinking it.
View Quote


That's what I thought. Gonna get it zeroed and test fired this afternoon.
8/7/2026 3:29:35 PM EDT
[#5]
Originally Posted By bpm990d:
I've got a gen 1 S&W Shield and wanted to get an red dot for it. I found an optic cut slide, rather than have my original slide milled. I've never done this, but I assume that replacing the slide is like replacing a bolt in a bolt gun and I should have the headspace checked?

Am I overthinking this, any issues just taking it out and shooting it?
View Quote


I bought an optics ready slide from Smith & Wesson on sale a couple years ago.  I swapped barrel and recoil spring and never looked back.
8/10/2026 2:07:08 AM EDT
[#6]
You are over thinking this, really the barrel alone is going to control the headspace if the barrel is out of spec it is out of spec.
8/10/2026 1:13:23 PM EDT
[#7]
I've done alot of mixing & matching of barrels and slides, with Glocks, and never gave headspace a thought.

Barrel passes plunk test, rounds chamber fine by hand, off it goes to the range.

Yesterday 1:03:25 AM EDT
[#8]
Very doubtful that you'd have headspace issues. But as usual just pay closer attention in the first few outings for signs of anything unusual or out of place. You definitely want to make sure the slide and barrel lock up and mate when loading a round.

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