Angled BUIS

General Firearms Precision Rifle - Semi-Auto
1

Anyone using angled BUIS? They are on the Army’s wish-list for an M110 replacement:

The US Army has issued a request to the private sector to reconfigure or replace the current Knight Armament M110 sniper rifle as the current version of the M110 is not functioning well in the field requiring significant maintenance and replacement of parts.

The specifications the US Army has issued are as follows:

1.Operation: Semi-automatic
2.Caliber: Compatible with 7.62x51mm NATO cartridges
3.Accuracy: Capable of 1.3 minute of angle dispersion or better with match ammunition
4.Size: Overall length shall be reduced using a shorter barrel and/or collapsible buttstock. Maximum length not to exceed 39 without suppressor. Desired minimum length is less than 36 with stock collapsed.
5.Weight: Weight shall be under 9.0 lb for unloaded rifle without optics and accessories
6.Grip: A modular, adjustable pistol grip.
7.Trigger: A non-adjustable match style trigger.
8.Hand guard: A forend that includes a fixed 12 o’ clock rail with configurable 3, 6, and 9 o’ clock rails.
9.Sound suppressor: A muzzle mounted, detachable sound suppressor.
10.Muzzle device: A compensator/muzzle brake compatible with the sound suppressor.
11.Bipod: Tool-less detachment featuring cant and pan/track capability.
12.Day optic: An Army specified variable power day optic and compatible rings.
13.Back up sights: Iron sights offset 45 deg from the DOS.
14.Sling attachment: Flush cup, quick detach sling attachment points.
15.Other: The upgraded M110 must meet the operational and environmental requirements that were fulfilled by the original M110 SASS.

So, if you are using them, fill us in on them please!

2

I have a set of them from Surefire and they are great. I was a little hesitant at first thinking they would be snagging my gear. But they haven’t snagged up and run great. Very easy to zero compared to my docters and other mrd’s. I like the fact they don’t need baterys and are extremely solid!

I will put a set eventually on every long gun I have.

3

The Surefires are fixed. Are there adaptors for folding BUIS…or would that defeat the purpose? It seems to me the fixed would be faster of course for rapid transitions, but they do stick out a bit and might snag stuff.

4

No more so than a scope and a bipod would, or fixed sights at the 12 o’clock like on any other rifle.

5

JP rifles sells a 45 adapter that puts it on line with their handguard at the 1:30 position. I mounted a set of magpul mbuis and they work great. They are a very low profile and are quick to access. I have been thinking of upgrading to metal sites as I could run a tritium front site.

6

I ordered a set of Duecks from a distributor and they got back-ordered. I then ordered from Dueck and they promptly shipped. Then my back-order arrived. Oh well, might as well keep them. I put one set on an LMT 7.62 and the other on my 5.45. I’ve shot maybe a thousand cartridges with them, they work and I like the concept. I need one more set but they are pricey so they will have to wait a couple months or years.

7

KAC does sell folding angled BUIS. 45 degrees might be a bit much rotation, but for a precision rifle that doesn’t have an IR LD mounted on either adjacent side, seems like it will work fine. Not going to be as fast as the Dueck/SF fixed ones if they’re not already deployed, but for the added cost and complexity you can stow them out of the way on a rifle you’re primarily going to use the glass with, and have irons available without having to detach a zoom optic.

8

Britain and New Zealand just adopted the LMT MWS the Kiwis with the angled Dueck BUIS… it makes me wonder if the LMT MWS might soon replace the Knight’s for the US Army.

Cameron

9

http://www.rainierarms.com/?page=shop/detail&product_id=1326

But to me, if I’m going to snag something I’d rather it have as few mounted parts as possible.

With a fixed setup you’re looking at 2 mounts that could come loose if hit hard enough and lose zero.

Where as on a system like I linked there, you have to mount it, then mount the sight to it. So 4 places where the zero could be lost.

However, the cost is less for the separate setup. $37x2 then $75 for the MBUS’. $150 for the whole thing and the Surefires are $240

10

Cool, but that looks like its just for MRDs. I think with irons they would be too high. If I could afford another T-1 though…

11

I don’t want to come off as one of those guys that always plugs their product be we are pretty proud of our 45 offset sights.

45 degree offset folding sight

12

I have a set of the KAC micros. Are the offset brackets sold seperate?

13

No they do not, the new offset sights actually dovetail into the mount to allow the user to mount the sights on the preferred side depending if they are a lefty or righty.

14

Those are a very nice set up. I like them better than the duedek set. I am happy with what I have but would consider those on a future build.

15

I might try the Knight sights instead of the Dueck for my next purchase. I like the thumbwheel on the front sight.

16

Why run these over say a T-1 in an offset mount?

17

No reason I can see except for cost. I will be going with a T-1/angle mount combo.

18

I am obviously missing something, cause the only advantage I can see to a set of fold down angled BUIS is the ability to get them up and running faster than as set of BUIS mounted at the 12 o’clock position. Guess they also give one the option of not needing QD mounts or rings for primary optics. I can see the fixed angle units being usable in short range situations if youre using more of a long range primary optic. Have a 2.5-10 or bigger primary and then being stuck having to engage inside 50 yds or worse even inside room distances. Here the fixed unit could save you money instead of running a T1 or RMR and an offset, however the fold down would be useless you knew you were about to get into trouble and opened them up ahead of time.

19

I have a set of fold down angle mounted sights and have to disagree with you in that you flip them up when you go to use the rifle but for storage they fold down nice and low. They are very quick to put into use if need be but otherwise they are not something that would get hung up.

20

Hadnt thought about running the fold down units open during use. The Knights units don’t lock in place as far as I know. Has that been an issue… Getting partially moved about during hard use. Any durability issues with the fold downs?