

Williams Diopter Sight
$37.99
Quantity:
Notify Me
Estimate Shipping
Shipped & sold by Pyramyd AIR
1-year limited warranty
60 day money back guarantee
Description
- Williams peep sight (5D-AG, part No. 70809)
- Fits 11mm dovetails
- Windage and elevation adjustments
- Useful for airguns and rimfires with a high line of sight
Home in on your targets by replacing your air rifle's rear sight with this one from Williams.
Overall Rating
Review This Product
Tell us what you think






10 of 95 Williams Diopter Reviews
Went in my Beeman R1 and R10 which have the aperture front sights and had plenty of adjustment for 10m and farther for outside. Simple and easy.
Things I Would Have ChangedNothing
The Williams aperture sight is well made. Adjustments are precise. Visible improvement in accuracy over the fine open sights of my HW57. After several hundred shots, the sight has not shifted. I used my HW57 for plinking beverage cans, clay pigeons, and other similar sized targets. I have no problem hitting these targets at distances up to 75 yards. If I see the target, I can usually hit it. I have the same Williams sights with target knobs mounted on a high power Diana Mauser 98 underlever right. The sight has not shifted under the heavier recoil of the K98. I can buy different sized apertures for the rifle.
Things I Would Have ChangedThe Williams Aperture sight is time tested. At the price of this sight, I can't think of any improvements. I have several and have yet to find a complaint.
What Others Should KnowThe Williams aperture sight is value priced and of high quality. It improves accuracy and evokes smiles when you hit a distant target. There is no reticle to break from the recoil of high powered gas/spring powered rifles.
Easy to install and use. The Height and range of adjustment perfectly matches the wooden version stock on my Avenger.
Things I Would Have ChangedA version with the TK (target knobs would have been my choice. But They are available from Williams.
What Others Should KnowThey perform as well as sights costing twenty times as much. Don't count clicks, count turns (five minutes per 360 degree rotation). Do this by coloring one of the indentations on the adjustment head and a corresponding mark on the sight body. Always establish a "bottom" on the sight in clicks from your selected elevation in case you lose your attention span.
It works as an aperture sight once you get it zeroed.
Things I Would Have ChangedA very basic aperture sight. Adjustments are crude, about the same level as the cheap factory rear sight on a Crosman 1377. The windage adjustment, if it can be called that, has no witness mark, making it even cruder. The mounting screws are extremely small. Maybe they'll hold a springers recoil. I guess I will see.
What Others Should KnowIf you are used to and looking for old-school Williams quality of the 60s thru the 90s, you will be shocked at this. I guess the fact that it is made of aluminum instead of plastic makes it a Williams. Once you get it zeroed---precisely? Good luck---it will work fine. Best bet is forget the absolute idea the Williams meant quality. Perhaps they do, but not at this level. The next step lower is plastic.
I like the simplicity and the quality of the sight.
Things I Would Have ChangedIf you can find one get the model with the adjustment knobs.
What Others Should KnowThis model requires a bit of patience to get set up.
Well built, excellent fit and finish. Works as advertised-very well.
Things I Would Have ChangedAdd application info to the product page. This sight requires a tall sight post, limiting its usefulness at short range.
What Others Should KnowWilliams make a lower profile version that works better on guns like the 2240. The Williams FP-GR-TK Aperture Sight is the one for that and similar applications. The sight I bought will find its home on a Crosman Valiant .22.
Fits the dovetail grooves on my Crosman Vantage .22. Very easy to mount and adjust.
Things I Would Have ChangedMaybe two different sized aperture fittings? Perhaps an included 'adapter' to fit Picatinny/weaver mounts.
What Others Should KnowI purchased this because I was not satisfied with the rear sight on my Crosman Vantage .. this was really an experiment. I had to turn the underside grip/mount around (easy to do) so that it was going in direction to fit the dovetail. I mounted mine very close to my eye .... It is said by some that you "need" to have the front and rear sights on a Break Barrel rifle both on the barrel ... however, I have had no problems at all with the Diopter sight on the back of the rifle .. it locks down tight and holds zero no problem. Most rear sights are easy to remove and this is (in my humble opinion) an upgrade to most of them.
This got rid of vertical stringing on my springer rifles, compared with the notch and post stock sights. I guess my hold wasn't bad but I wasn't lining up the post with the notch. The peep hole makes the eye and brain automatically want to see the post right in the middle. Compared with competing peep sights that would fit, which are few, it is a good value. The design is classic Yankee-jankey, like something someone designed 100 years ago out of frustration with the times, but it all works in the end. And my springers can beat on it all day and it won't get out of adjustment.
Things I Would Have ChangedI was at the limit of vertical adjustment when the front peep barely aligned with the post, and this is the "high" peep. It doesn't look like the vertical lock will secure the top if it extends more than halfway up the scale, and the vertical screw is in fully at that point anyway, so maybe make an "even higher" peep sight? Or I suppose one could get an adapter to raise it.
What Others Should KnowIf you can't get the peep to line up with your front post even at the limit of windage, try flipping the sight around, as the mount is a little biased to one side.
It fits my Beeman Sportsman .177/.22, a Diana 250, and a Hatsan 25 pistol.
On the pistol, the large front sight is too close to the diopter to see well, but I can remove the diopter and see the front post well through the ring, and it is at least as accurate as with the stock sights, maybe better. For example, if I broke my stock rear sights I would prefer the Williams over a replacement notch from Hatsan.
Careful, "once you go peep you'll sight in your sleep".
Increases accuracy.
Things I Would Have ChangedNo instructions for changing elevation or windage.
What Others Should KnowHave screwdrivers handy to make adjustments.
Get FREE shipping on qualifying orders! Any order $150+ with a shipping address in the contiguous US will receive the option for free ground shipping on items sold & shipped by Pyramyd AIR during checkout. Certain restrictions apply.
Free shipping may not be combined with a coupon unless stated otherwise.
View Shipping Info
During busy holidays, we step our efforts to ship all orders as fast as possible, but you may experience an additional 1-2 day delay before your order ships. This may also happen if you change your order during processing.
View Shipping Times
U.S. federal law requires that all airsoft guns are sold with a 1/4-inch blaze orange muzzle or an orange flash hider to avoid the guns being mistaken for firearms.
View Shipping Restrictions
If you're picking up a new air gun, our team can test and tune the equipment before it leaves the warehouse. We can even set up an optic or other equipment so you can get out shooting without the hassle. For bowhunters, our certified master bow technicians provide services such as assembly, optics zeroing, and full equipment setup, which can maximize the potential of your purchase.
By leveraging our expertise and precision, we ensure that your equipment is finely tuned to meet your specific needs and get you ready for your outdoor pursuits. So look out for our services when shopping for something new, and let our experts help you get the most from your outdoor adventures.
View Service Info
A warranty is provided by each manufacturer to ensure that your product is free of defect in both materials and workmanship.
View Warranty Details
If you need to return an item please read our return policy.
Learn About Returns
Get FREE shipping on qualifying orders! Any order $150+ with a shipping address in the contiguous US will receive the option for free ground shipping on items sold & shipped by Pyramyd AIR during checkout. Certain restrictions apply.
Free shipping may not be combined with a coupon unless stated otherwise.
View Shipping Info
Join the Pyramyd AIR mailing list: Our e-mails are filled with new products, deals, sneak peeks, tips and tricks, contests and more - sign up today!
Text JOIN to 91256 and get $10 OFF Your Next $50+ Order!
* By providing your number above, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in from Pyramyd AIR on 91256. Reply with birthday MM/DD/YYYY to verify legal age of 21+ in order to receive texts. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
Jul 31, 2024
By David
Easily adjustable and adaptable to my RWS 54 Air King .22 rifle. With this peep and a new globe front sight, I can easily achieve groups smaller than dime sized from 20 yards and without magnification. I love the micro-adjustment of elevation. Another thing I like is that since this sight is so light, it doesn't affect the balance and recoil absorbing performance of the Air King. After squeezing off a shot, the sight stays right on target, helping to eliminate bad trigger moves or flinching.
Things I Would Have ChangedNothing
What Others Should KnowOn installation, loosen the elevation adjustment and pull the sight up and out of the dovetail to get access to the screws you must adjust to fit it onto your receiver's dovetail.