BUIS Guide Discussion

**Uglyduck** · 9 February 2009, 20:51

I thought it might be helpful to have a discussion thread that pertains to the two BUIS Guides. So, with the admins. blessing here it is. Below are the links to the Front and Rear BUIS guides.

Rear
Front, Rail Mounted

After reading the guides a couple of questions came to mind;

Which Front and Rear BUIS have the lowest profile when closed?
Which HK style front BUIS would be the optimal selection to pair with the Brownells 360 rear BUIS for flip up HK Diopter sights?

**Army Chief** · 9 February 2009, 21:34

Not sure about the lowest profile, but it might be more instructive if we start from an existing baseline, such as the Troys.

Are there other BUIS variants that come in under those (dimensionally)?

AC

**Uglyduck** · 9 February 2009, 21:47

Troy Rear- .460
MI SPLP- .4375
And Hahn precision claims to have the lowest but I have not seen any figures to support that.

**Army Chief** · 9 February 2009, 22:48

Perfect! Now we're onto something ... :)

AC

**Uglyduck** · 13 February 2009, 08:02

anyone happen to have any info on Hahn Precision's rear BUIS?

**Stickman** · 13 February 2009, 12:48

I've heard about it, but not actually seen or used one. Nor am I familiar with anyone who uses one on their weapon.

Hopefully someone here will be able to give some first hand input.

**Uglyduck** · 15 February 2009, 14:03

Here is some more info on the Hahn Precision rear BUIS. This may be more appropriate in the guide itself rather than this discussion but I'll leave that for admin to decide.

Hahn Preicsion Rear BUIS

This rear BUIS delivers a stream lined and simple design with a low profile that will prevent snagging. It uses standard A1 hardware for easy serviceability and nylon tipped allen screws to secure the body to the upper receiver without marring the finish. The forward edge is sloped, providing easy access to optics. It was designed to be be reliable with the K.i.S.S. concept in mind.

Length 2.15” (5.4cm)
Width 1.2” (3 cm)
Height .9” (23mm)
Weight 1.53 oz. (42g)
Aperture diameter .117”

Information and photos courtesy of Rainier Arms and Brownells

**Stickman** · 15 February 2009, 15:06

That info, and new pictures will go in the guide. I now have one of the sights sitting in front of me.

**jmart** · 21 February 2009, 11:17

Stick,

What is the purpose of the third hole, at the rear of the sight? It looks threaded. Does that serve as a third point for a screw used to secure the sight?

**Stickman** · 21 February 2009, 20:05

It looks like an additional attachment method, but I don't see a method of doing it. I'm really not sure what its there for. Its always possible its a point used in the manufacturing process.

**Uglyduck** · 13 March 2009, 23:49

Anyone have experience with the Knights Armament flip front sight for the RAS? KAC

**Stickman** · 14 March 2009, 10:05

Originally Posted by Uglyduck

Anyone have experience with the Knights Armament flip front sight for the RAS? KAC

Yes, and I really like it. I need to get it added to the BUIS guide.

**Venom** · 15 March 2009, 02:04

Stick, have you checked out the new WilsonCombat gasblock flip up ?

**Stickman** · 15 March 2009, 11:55

Originally Posted by Venom

Stick, have you checked out the new WilsonCombat gasblock flip up ?

I've seen a couple very small images, not much else.

**Venom** · 15 March 2009, 13:22

same here. If you find some more info or get one yourself, pictures and opinion pls

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