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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Vector Optics Sentinel X 10-40x50 SFP (SCOL-34)Features: Custom Designed Patent Reticle Exclusive for 25 Meters Benchrest Target Shooting Reticle Used at 40x Power, 1. 5mm Center Dot Perfect Matches Target 2mm Dia. Bull eye Long Eye Relief, 30mm Monotube, Wide Field of View, Side Focus Min at 10 Yds, Turret Lock System Specifications: Magnification: 10 40x Objective Lens: 50mm Ocular Lens Dia: 44mm 1. 7 inch Ocular Length: 67mm 2. 6 inch Exit Pupil: 5. 0 1. 25mm Length: 405mm 15. 9'' Weight (net):
Features:
- Custom Designed Patent Reticle Exclusive for 25 Meters Benchrest Target Shooting
- Reticle Used at 40x Power, 1.5mm Center Dot Perfect Matches Target 2mm Dia. Bull-eye
- Long Eye Relief, 30mm Monotube, Wide Field of View, Side Focus Min at 10 Yds, Turret Lock System
Specifications:
- Magnification: 10-40x
- Objective Lens: 50mm
- Ocular Lens Dia: 44mm / 1.7 inch
- Ocular Length: 67mm / 2.6 inch
- Exit Pupil: 5.0-1.25mm
- Length: 405mm / 15.9''
- Weight (net): 775g / 27.3oz
- Eye Relief: 92-85mm / 3.6-3.3 inch
- Field of View (@100yds): 3.8-1.1°
- Optics Coating: Fully-multi coated
- Reticle: Etched glass COM-25M
- Click Value: 1/8MOA
- Evaluation Range: 50MOA
- Windage Range: 50MOA
- Parallax Adjustment: 10 meters to infinite
- Finish: Black matte
- Illumination: N/A
- Exclusive for air gun and 22LR rimfire etc benchrest shooting and competition at 25 meters target
Additional Information:
- The reticle is designed to match the standard size of benchrest shooting target
- Reticle Used at 40x Power, 1.5mm Center Dot Perfect Matches Target 2mm Dia. Bull-eye
- Reticle each graduation on horizontal line coincides with all target rings
- Side focus knob marked 25, 50, 100M to infinite
- Distance between objective lens part and middle turret: 77mm (3.0 inch)
- Length of middle turret part: 38mm (1.5 inch)
- Distance between middle turret parts to power ring: 56mm (2.2 inch)
- Shock tested to 1000g, waterproof, and fully nitrogen purged
- Turret lock system. Pull to adjust, press to lock.
- High-quality 6061 T6 aircraft-grade aluminum
- Diopter compensation from fast-focus eyepiece -2 to +1.5
- Including items: one pair of 30mm weaver scope rings, cleaning cloth, instruction, flip-up cap, and packed in a nice retail box
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1024 reviews
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Product Reviews
★★★★★ 5
Whistle away my friend!
Size: 2 Count (Pack of 1), Style: Pack of 2
Love it! My dog loves it! The people at the dog park love it! The whistle is the best thing about these balls but the hard durable rubber and the denseness of the ball really make it fly. Let me quickly breakdown each of these:
First the sound is like a...well, whistle coming from a human but oscillating and slightly different. It helps the dogs track where it goes and helps them find it better when it is getting dark (while flying of course, not when it is stationary). It barely makes a sound when throwing it with the wind but really howls when throwing it into the wind. This is why you get this ball and most everyone at the dog park perks up and wonders what that is, asks about it, and thinks it is very cool; which it is!
Next is the durable rubber which doesn't have a single bite mark or split yet in 4 months of constant daily play for about 1 1/2 hours every day! The dog chews it as he brings it back and other dogs steal the ball and run with it while "killing" it perpetually and it has held up great. I don't claim this is going to be Kong ball durable but it is very well chosen rubber.
Last is the denseness of the ball which really makes to go far in a chuckit launcher. One doesn't really notice how far this goes until going back to a tennis ball and realizing how short a tennis ball goes compared to this. The whistler ball, and presumably other chuckit rubber balls (glow, irregular bounce), go 30-40% farther when I throw then using the longest chuckit thrower. This is excellent and wears my retriever out even faster; not to mention the rippling muscles he has from sprinting that whole way!
Overall I got both ball several months ago and we started with the blue ball and haven't had to touch the orange one yet. This is his goto ball at the park and it is the most popular ball, bar none, for all the dogs to steal. The bright blue aspect, the rubber aspect, the sound, and exclusivity of it make it coveted by dogs and owners. I might be gushing and glowing over this ball a bit much but I tend to do that when something unexpected ends up being part of your everyday life and blows you away at how wonderful it is.
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Reviewed in the United States on December 20, 2012
★★★★★ 5
Great for dogs that are chewers
Size: 2 Count (Pack of 1), Style: Pack of 2
These are wonderful for our dog. The bright colors help us find them when our dog can't. The size is perfect to play fetch. Our dog will chew on it a bit and it stays together and does not fall apart. That is a big bonus because our dog is a chewer!
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Reviewed in the United States on February 4, 2026
★★★★★ 5
It's A Whistler!
Size: Medium (Pack of 1), Style: Pack of 1
This Chuckit! Whistler Ball is basically a regular fetch toy that decided to become an annoying little teakettle mid-air. My dog goes absolutely nuts for it—every throw sounds like a tiny referee is shrieking "foul!" the whole way across the yard. He chases it harder than he chases the mailman, and bonus: I can actually find it in tall grass because it's screaming for help. Super bouncy, tough enough that he hasn't destroyed it yet (miracle), and now our walks sound like a low-budget horror movie.
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Reviewed in the United States on February 14, 2026
★★★★★ 4
Great buy
Size: 2 Count (Pack of 1), Style: Pack of 2
Easy to track balls. My dog loves them and I like that they whistle when you throw them cause some times my dog loses track of it in the air. This helps because they can hear where it's going. Will buy again.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
My Dog's Favorite Balls
Size: 2 Count (Pack of 1), Style: Pack of 2
My dogs love these balls and won't play with any others. My lab has to carry the orange ball and track and retrieve the blue one. We have a system!
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Reviewed in the United States on May 23, 2026