Which BUIS do I neeed?

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[ARCHIVED THREAD] - Which BUIS do I neeed?

Posted: 10/16/2004 8:24:53 PM EDT

Okay, I'm new at mounting optics on flat-tops. On a Bushmaster no-ban M4A3 I want to mount an ACOG and flip-up BUIS. The Bushmaster catalog lists their flip-up ($75) and claims it's 1/8" lower than others when down. Is this the right choice or is there a better one. If so, brand and model number please. I'll be ordering one Monday.

Thanks,

Rich

Posted: 10/16/2004 9:01:18 PM EDT

[#1]

For slightly more (less than $100) you can get an ARMS #40. In my opinion it is a much greater value than most other BUIS's. What ACOG mount are you getting? The #40 will fit under an ACOG with an ARMS or LaRue mount for sure, but may or may not fit under an ACOG with the Trijiconj TA51 mount. There is a low profile version called the ARMS #40L (L for low) thats about $10 more. The #40L will fit under any of the above gauranteed.

Nothing wrong with the Bushmaster sight, but the #40 is probably much more durable, is spring loaded which means it cant ever be knocked down and has no locking detents that can potentially break. It secures to the receiver better and has a better finish. In my opinion, thats worth the $25 more.

Posted: 10/16/2004 9:10:30 PM EDT

[#2]

Troy FBS-R or FBS-RA1, soon to be released. Dual same-plane apertures, rock solid. The A1 version locks windage just like the old-style Troy rear. Lower than almost any other rear BUIS when folded. Locks in the "up" position.

The old one:

[ link to LARGER image ]

-z

Posted: 10/16/2004 9:13:09 PM EDT

[#3]

Quoted:
For slightly more (less than $100) you can get an ARMS #40. In my opinion it is a much greater value than most other BUIS's. What ACOG mount are you getting? The #40 will fit under an ACOG with an ARMS or LaRue mount for sure, but may or may not fit under an ACOG with the Trijiconj TA51 mount. There is a low profile version called the ARMS #40L (L for low) thats about $10 more. The #40L will fit under any of the above gauranteed.

Nothing wrong with the Bushmaster sight, but the #40 is probably much more durable, is spring loaded which means it cant ever be knocked down and has no locking detents that can potentially break. It secures to the receiver better and has a better finish. In my opinion, thats worth the $25 more.

+1

ARMS #40A or #40L

Posted: 10/16/2004 9:14:10 PM EDT

[#4]

I do want a Troy BUIS pretty bad. On the A4 for sure!

Posted: 10/16/2004 9:15:57 PM EDT

[#5]

Quoted:
+1 ARMS #40A or #40L

Im not sure the #40A will fit under the ACOG. Im pretty sure it wont. Thats why I only suggested the #40 and #40L.

Posted: 10/16/2004 9:19:33 PM EDT

[#6]

Quoted:
Quoted:
+1 ARMS #40A or #40L

Im not sure the #40A will fit under the ACOG. Im pretty sure it wont. Thats why I only suggested the #40 and #40L.

I seem to remember trying this. With a TA51 and the ACOG mounted rearward, I don't think it fits. Typical TA11 mounting will work (ie, more forward).

-z

Posted: 10/17/2004 7:03:48 AM EDT

[#7]

Hey, thanks guys!

I plan on ordering the TA51 mount so I guess the consensus is that the 40L is what I need. Decisions, decisions (but that's half the fun, right?). I have a Reflex II on an A2 that I'm happy with but am anxious to try the ACOG.

[ARCHIVED THREAD] - Which BUIS do I neeed?

AR-15 » Optics, Mounts, and Sights

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