Geissele Rail and Barrel Nut Tightness?

**Stickman** · 02-17-20, 12:30

Originally Posted by Giggles

I'm asking because I have heard that with some Geissele rails and barrel nuts the tolerances are loose.

Who did you heard this from? There are companies that pay people to trash talk and post lies about both persons and companies they don't like.

**vandal5** · 02-17-20, 14:17

Originally Posted by Stickman

Who did you heard this from? There are companies that pay people to trash talk and post lies about both persons and companies they don't like.

As if fanboys didn't talk enough trash, now we have them on the books too?

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**Stickman** · 02-17-20, 14:19

Originally Posted by vandal5

As if fanboys didn't talk enough trash, now we have them on the books too?

Sent from my SM-G920V using Tapatalk

Very, very much so.

**Hkbeltfed** · 02-18-20, 13:06

I think their good fit is as simple as this, “Slide the handguard onto the barrel nut. Be very careful when doing this as the clearance between the OD of the barrel nut and ID of the handguard is precisely machined to about 0.001” clearance.”

**scottryan** · 02-18-20, 15:17

The rail should slide on with some light taps from a rubber mallet or piece of wood.

I do not put any grease on any outer barrel nut surface that uses a slip over rail as this grease lowers the friction between the ID of the rail and barrel nut, which causes the rail to squirm, causing zero shift issues.

**SeriousStudent** · 02-18-20, 18:25

Originally Posted by Giggles

Which of the Geissele rails has a tight lock up with the barrel nut before it is mounted in place? I'm asking because I have heard that with some Geissele rails and barrel nuts the tolerances are loose. Also which rails should I stay away from if I'm worried about the tightness. I would prefer answers from personal experience.

What's your source of this information?

Personal experience: I own three Geissele rails, and have probably mounted another 7 or 8 for other people. None have ever been loose.

**Giggles** · 02-18-20, 20:04

I read what I believe is something that someone posted in a large post on this site, regarding Geissele having tolerance issues with certain rail models.