12 Crosman 766 Bb Gun of 2026 For Rebuilds and Replacements

1

Crosman 766 Rebuild Kit Reseal O-Rings Seals Pump Cup Check

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• ARS Mark

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  7.1
• Brand
  JL Missouri Parts & Misc.

Key specs1

Internal Reseal Hardware

This kit supplies the critical soft seals, pump cup, and check valve stem required to rebuild leaking compression chambers in older Crosman 766 airguns.

Pros & cons32

Pros

• Includes dedicated o-rings, valve seals, and a replacement check valve stem for the Crosman 766
• Contains a replacement pump cup to restore lost pneumatic compression
• Designed specifically to service worn internal valve assemblies in vintage 766 models

Cons

• Requires complete disassembly of the vintage air rifle receiver and valve assembly
• Does not include assembly lubricant or installation instructions in the listing

2

Crosman Pellgunoil 241 (.25-Ounce)

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  9.0
• Brand
  Crosman

Key specs1

Lubrication Requirements

A periodic drop on pump linkages and seal faces maintains synthetic rubber pliability, preventing premature compression leaks in pneumatic airguns.

Pros & cons32

Pros

• Formulated specifically for airgun maintenance and seal preservation
• Compact 0.25-ounce applicator bottle fits neatly into shooting field bags
• Helps prevent rubber pump cups and valve o-rings from drying out over time

Cons

• Small fluid volume requires reordering for frequent multi-gun maintenance
• Cannot repair torn seals or severely cracked compression cups on its own

3

Crosman CFAR1X Full Auto R1 CO2-Powered BB Air Rifle and

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  8.8
• Brand
  Crosman

Key specs2

Action and Firing Modes

Dual 12g CO2 cartridges drive selectable full-auto and semi-auto cycling, reaching listed speeds up to 430 fps without pump fatigue.

Magazine and Sighting Setup

• 25-round drop-out magazine sized for 4.5mm steel BBs
• Included red dot optic for target acquisition
• Quad forearm rails accommodate accessory additions

Pros & cons52

Pros

• Offers selectable full-auto or semi-automatic firing powered by dual 12-gram CO2 cartridges
• Delivers listed BB velocities up to 430 fps without manual pumping
• Includes a red dot sight and a bundled 15-pack of 12-gram CO2 cartridges
• Features a 25-round drop-out magazine compatible with standard 4.5mm steel BBs
• Equipped with an adjustable stock and quad forearm rail for accessories

Cons

• Rapid CO2 consumption requires keeping ample replacement cartridges on hand
• Steel BB ammunition is not included in the factory package

4

Crosman Daisy Powerline 426 Air Pistol 15-Count CO2 Cartridges for

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  9.2
• Brand
  Crosman

Key specs1

Sidearm Plinking Platform

A lightweight semi-auto CO2 handgun that delivers 430 fps plinking speeds across a built-in 15-shot magazine for fast target work.

Pros & cons42

Pros

• Semi-automatic CO2 operation fires 15 shots as quickly as the trigger is pulled
• Achieves listed velocities up to 430 fps for reactive target shooting
• Built-in 15-round BB magazine enables rapid reloads without detached clips
• Includes 15 12-gram CO2 cartridges to start shooting immediately

Cons

• Pistol format does not replicate the shoulder stability of a traditional rifle
• Lacks variable velocity control found on traditional multi-pump airguns

5

Daisy Powerline 880 Air Rifle

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  9.5
• Brand
  Daisy

Key specs1

Pneumatic Rifle Alternative

For shooters dealing with irreparable internal pump damage on older hardware, this modern multi-pump air rifle offers an affordable, self-contained replacement.

Pros & cons32

Pros

• Multi-pump pneumatic powerplant eliminates reliance on disposable CO2 cartridges
• Serves as a complete, fully assembled replacement for non-functional vintage pump rifles
• Traditional air rifle platform built for target shooting and backyard plinking

Cons

• Requires manual pumping before every single shot taken
• Detailed performance figures and bundled items must be verified on the product page

6

Crosman 0290RD Wide View Red Dot Sight For Airguns With

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  9.2
• Brand
  Crosman

Key specs1

Optic Rail Mounting

3/8-inch dovetail

Pros & cons32

Pros

• Wide-view design provides quick sight alignment for recreational shooting
• Configured with an integrated mount for standard 3/8-inch airgun dovetails
• Avoids front-and-rear iron sight alignment strain during backyard plinking

Cons

• Restricted strictly to airguns with 3/8-inch dovetail rails
• Requires battery power to generate the red dot reticle

7

Pump Head Seal Cup Gasket BB Air Push in. Intended

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  9.3
• Brand
  JL Missouri Parts & Misc.

Key specs1

Pneumatic Cup Replacement

Designed to snap onto the pump head piston, this push-in gasket restores compression stroke pressure when an old pump cup cracks or shrinks.

Pros & cons32

Pros

• Direct push-in replacement seal cup addresses primary loss of pumping pressure
• Compatible with Crosman 766 along with models 760, 1322, 1377, PC77, 2100, 2200, and 2289
• Targeted repair component avoids purchasing full valve assemblies when only the cup fails

Cons

• Does not include internal check valve stems or valve body o-rings
• Installation requires stripping down the pump piston arm assembly

8

Crosman 408T Vigilante BB Revolver Magazine Clips, 6 Round, Black,

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  8.9
• Brand
  Crosman

Key specs1

Rotary Clip Capacity

6 rounds per clip (3-pack)

Pros & cons32

Pros

• Includes 3 separate replacement magazine clips to minimize reloading downtime
• Each rotary clip holds 6 steel BB rounds for structured target practice
• Durable black molded design engineered specifically for the Crosman Vigilante

Cons

• Compatible only with the Crosman Vigilante revolver platform
• Does not fit rifle platforms or vintage pneumatic receivers like the 766

9

Crosman 25-Count 12-Gram CO2 Cartridges For Air Rifles And Air

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  9.1
• Brand
  Crosman

10

Crosman 1077 RepeatAir Semi-Automatic CO2-Powered .177-Caliber Pellet Air Gun, Black,

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  7.9
• Brand
  Crosman

Key specs1

Semi-Automatic Pellet Action

A lightweight semi-auto repeater firing .177 pellets from CO2 power, presenting a modern alternative for shooters tired of pumping vintage actions.

Pros & cons32

Pros

• Semi-automatic action fires .177-caliber pellets with every pull of the trigger
• CO2 powerplant eliminates manual pumping between consecutive shots
• Traditional full-length black synthetic rifle layout provides stable shoulder support

Cons

• Fires pellets only and does not accept steel BBs
• Velocity and shot count per 12-gram CO2 cartridge vary and should be verified

11

JL Missouri Parts New Screw on Rear Sight Notch for

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  9.7
• Brand
  JL Missouri Parts

Key specs1

Sighting Hardware Fitment

Replaces missing or stripped factory iron sight notches on vintage 766 and 760 airguns, securing onto original rear sight receiver provisions.

Pros & cons32

Pros

• Direct factory-style replacement for broken or missing rear sight notch part 262A200
• Matches mounting dimensions on vintage Crosman 766, 760 Pumpmaster, and 2100 B airguns
• Restores open iron sight targeting without having to mount an external optic

Cons

• Mounting screws and base hardware are not explicitly included
• Provides the notch plate only rather than a full elevation slider assembly

12

Highwild BB Trap Target (Airgun Only) with 10pcs 7" X

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  8.2
• Brand
  Highwild

Key specs1

Included Backstop Targets

• Heavy-duty airgun trap box
• 10 replacement paper targets (7 x 9 inches)
• 2 rotating metal spinner targets

Pros & cons42

Pros

• Airgun-specific metal trap safely captures steel BBs and spent ammunition
• Includes 10 paper targets measuring 7 x 9 inches for precision practice
• Equipped with 2 integrated spinner targets for instant visual hit feedback
• Enables safe indoor or backyard plinking when used with appropriate backstops

Cons

• Specified strictly for airgun use and unsuitable for firearms
• Requires regular emptying to prevent BB ricochets off accumulated debris

Last update on 2026-10-13 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Why will a Crosman 766 not hold air or build compression?

Compression loss in a Crosman 766 is caused by dried-out internal o-rings, an aged check valve stem, or a worn pump head cup gasket. When the push-in pump head seal cup cracks or hardens over time, the pump arm cycles without forcing air into the compression chamber. Deteriorated valve seals also allow any gathered air to dump out immediately through the transfer port or exhaust valve instead of holding pressure behind the bolt.

Which rebuild parts are needed to reseal an older Crosman 766 air rifle?

A full reseal requires a Crosman 766 rebuild kit that includes fresh o-rings, an exhaust valve seal, a check valve stem, and a push-in pump head seal cup gasket. The push-in pump head seal cup gasket fits several vintage and modern models, including the Crosman 760, 766, 1322, 1377, PC77, 2100, 2200, and 2289. Verifying the specific valve revision in your rifle before assembly ensures the check valve stem matches your valve body seat.

What type of oil should you use on Crosman 766 pump seals?

Use a non-detergent airgun oil such as Crosman Pellgunoil on the pump cup and mechanical pivots. Petroleum-based firearms cleaners and standard motor oils contain detergents and solvents that cause synthetic rubber seals and o-rings to break down rapidly. Adding a couple of drops of genuine Pellgunoil directly to the pump linkage helps preserve seal flexibility, keeps the pump stroke smooth, and maintains an airtight compression cycle.

Where can you find a replacement rear sight for a Crosman 766?

You can install a replacement screw-on rear sight notch designed for the Crosman 760 Pumpmaster, 2100 B, and 766 under part number 262A200. This replacement rear notch mounts directly to the original receiver screw hole. If the original iron sight base is missing or damaged, an alternative aiming solution is mounting an optic like the Crosman 0290RD wide view red dot sight onto an airgun with a 3/8-inch dovetail mount.

Is repairing an old Crosman 766 worth it compared to buying a new rifle?

Resealing is worth the effort if your rifle's pump lever, valve casing, and barrel remain structurally sound and free of deep rust. Installing a dedicated reseal kit restores factory compression and saves an iconic multi-pump classic for a fraction of the cost of a replacement. But if the interior compression tube is deeply scored or internal metal threads are stripped, switching to a modern multi-pump air rifle like the Daisy Powerline 880 avoids tedious repairs and delivers dependable shooting out of the box.

What should you consider if you want to replace your multi-pump rifle with a repeating model?

If you want to spend less time operating a pump handle between shots, consider moving to a magazine-fed CO2 air rifle. A model like the Crosman CFAR1X full auto R1 BB rifle runs on two 12-gram CO2 cartridges, achieves velocities up to 430 fps, and features a 25-round drop out magazine compatible with 4.5mm steel BBs. Readers looking for semi-automatic backyard plinking can compare options among the top CO2 BB gun models or look into a tactical air rifle setup for fast-paced target shooting.