Date: 16/7/2019 1:15
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BSA 42mm Red Dot Sight, 5 MOA, 11-Position Rheostat, 3/8" & Weaver Mounts

3.518 reviewsReview, article, latest buzz
BSA 42mm Red.

Fits Weaver dovetails/rail

Fits 3/8" and 11mm dovetails.

Includes elastic lens covers

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Consider the following similar item(s)

  • BSA red dot sight
  • 42mm objective lens
  • 11-position rheostat
  • Integral 3/8" & Weaver mounts*
  • 50 yds fixed parallax
  • 77 yds field of view @ 100 yds
  • 5 MOA
  • 45 MOA max adjustment range in both directions
  • 7 oz.
  • 3.80" long
  • Black matte finish
  • Includes elastic lens covers
  • 1-year limited warranty
*Packaging says it has a 5/8" mount--this refers to a Weaver base

Compact, lightweight red dot sight that'll fit Weaver or 3/8" dovetails (also 11mm dovetails). Perfect for centerfire guns, rimfires, air guns and airsoft guns.

Item Code: BSA-RD42 [PY-A-2725]

other products by Gamo > BSA

Average Customer Review

3.5 (18 reviews)

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5.0 5.0

5.0 5.0

By Jeff from USA on 2019-01-05
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5.01 rating

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Things I liked: Everything

Things I would have changed: Nothing


1.0 1.0

1.0 1.0

By James from USA on 2018-02-03
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5.01 rating

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Things I liked: Unfortunately nothing, except perhaps the appearance.

Things I would have changed: It would be immensely helpful if the product actually worked as advertised. It did not. Also the manual seems to be inaccurate, describing a separate on/off switch for the red dot next to the rheostat, which is not there.

What others should know: I think I was shipped a defective, used item. The manual stated the battery would be in a plastic bag to prevent early discharge but it was installed in the scope. There was no separate on/off switch as the manual stated, but turning the rheostat to position 9 (of 12) seemed to turn off the red dot. Also the red dot was all the way over on the right side at 2 to 3:00 with no way to center it. I would not buy it again and hope I am refunded my full purchase price with no restocking fee. This should not be restocked, it should be returned by PA to the manufacturer or destroyed.


2.0 2.0

2.0 2.0

By Rann from USA on 2018-01-23
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0.00 ratings

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Things I liked: It fits 5/8 OR 3/b (11mm) dovetail rails.

Things I would have changed: - No magnification. - Red (dot) reticle only. (See below...) - Elevation & Windage KNOBS would have been nice. (What you see are just removable caps; adjustments must be made with screwdriver.) - Heavy.

What others should know: This is my THIRD attempt to find a red dot scope for my Trevox, whose fixed sights seem worthless. This is my second BSA scope, that Pyramyd recommended when my first 11mm Red Dot would not fit the 11mm rails on my Trevox pistol, although the specs suggested they were compatible. My first BSA scope was defective. (See previous review here.) The "dot" was a huge, useless red blur. The "dot" on my second BSA scope is better...smaller...especially on the highest brightness setting. However, less eye relief seems better than more (this is NOT unlimited eye relief), so might work best on a rifle...not a pistol. It remains to be seen whether I'll return this and ask for a refund this time. If so I guess I'll just throw the Trevox in the trash? Personally, I would and cannot recommend anyone purchasing either of these from any vendor.


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  • Carl from USA asked:

    With a set parallax at 50yrds, how would this work on a 2400KT for 20yd shooting?

    • Tyler from USA:

      It would work just fine. There's not enough magnification for the parallax setting to be a big issue at distances other than 50 yards

  • James from USA asked:

    I just bought this and the red dot is all the way on the right at about 2-3 o'clock. Is this normal?

    • Roger from USA asked:

      Will a BSA red dot scope hold up to a RWS Diana LP8 Magnum springer pistol?

      • Stanley from USA:

        I would go with the Hawk or UTG brand in my opinion.

    See all discussions