15 Crosman 1377 Stock Adapter of 2026 For Rock-Solid Carbine Builds

1

3DEXL Scope Rail Mount Adapter for Crosman 1377, 1322 Weaver

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• Brand
  3DEXL

Key specs2

Optic Rail Length

8 1/4 inch with 21 slots

Mounting Profile

Supports standard 20mm Weaver and Picatinny rings to elevate optics to carbine cheek height.

Pros & cons32

Pros

• Provides an 8 1/4 inch rail with 21 slots for flexible optic placement
• Converts standard Crosman 1377 and 1322 barrels to fit Weaver and 20mm Picatinny optics
• Full length rail span allows generous eye relief adjustment for carbine configurations

Cons

• Adds top rail hardware that does not provide shoulder support on its own
• Mounting method and clamping hardware details are not specified in the listing

2

SQOTDR Metal Band for Crosman Pumper Longer/Standard Barrel with Sight

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• Brand
  SQOTDR

Key specs2

Front Assembly Role

Replaces factory front barrel clamp to secure the barrel and pump tube during heavy cocking cycles.

Sighting Provision

Integrated front sight

Pros & cons32

Pros

• Replaces the factory plastic front band with durable metal construction
• Includes an integrated front sight post for open sight shooting
• Compatible with both standard and longer barrels on 1377 and 1322 platforms

Cons

• Does not function as a rear stock mount or shoulder adapter
• Specific metal alloy type and finish are not detailed in the listing

3

SQOTDR Black Aluminium Alloy Variable Pump Band & Silencer Adapter

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• Brand
  SQOTDR

Key specs2

Muzzle Integration

Merges front tube clamping with a silencer mount to streamline barrel hardware at the front.

Material Composition

Black aluminium alloy

Pros & cons32

Pros

• Combines a pump barrel band and silencer adapter in a single aluminium alloy unit
• Black finished aluminium alloy offers rigidity over stock synthetic front bands
• Maintains barrel stability on Crosman 1377 and 1322 variable pump tubes

Cons

• Mounts at the muzzle rather than providing rear shoulder stock attachment
• Thread size and pitch for suppressors must be confirmed prior to attachment

4

Crosman 1377 Custom Shoulder Stock

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• Brand
  Crosman

Key specs2

Carbine Conversion

Attaches straight to the 1377 grip frame, transforming the pump pistol into a shoulder-fired carbine.

Shoulder Interface

• Replaces factory grip panels directly
• Provides stable rear shoulder bracing
• Facilitates steady multi-pump shooting

Pros & cons42

Pros

• Bolts directly to the Crosman 1377 grip frame to create a stable shoulder carbine
• Official Crosman component designed specifically for factory grip screw alignment
• Provides a firm cheek weld and shoulder rest for steadier aim than shooting handheld
• Eliminates the need for aftermarket receiver drilling or clamp modifications

Cons

• Elevates eye position above factory iron sights, often requiring a raised optic
• Specific frame screws must be verified if reusing original grip fasteners

5

Crosman 1377/1322 UNI Suppressor Adapter

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• Brand
  Generic

Key specs1

Barrel Fitting

Adapts the front barrel profile for accessory moderation on pump-action airguns.

Pros & cons32

Pros

• Provides a dedicated suppressor mounting point for Crosman 1377 and 1322 airguns
• Compact front adapter keeps overall front-end weight minimal
• Mounts directly to compatible barrel profiles without altering receiver parts

Cons

• Serves front muzzle devices rather than rear shoulder stock mounting
• Thread specifications and bore diameter are not listed and require verification

6

Stainless Steel Silencer Adapter 1/2 20 UNF for Crosman 11mm

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• Brand
  SQOTDR

Key specs2

Thread Standard

1/2-20 UNF

Barrel Fitment

Designed for 11mm barrel diameters across Crosman 1377, 1322, and 2240 models.

Pros & cons32

Pros

• Machined from stainless steel for thread durability and corrosion resistance
• Standard 1/2-20 UNF male threads fit widely available muzzle accessories
• Engineered specifically for 11mm outer diameter barrels across multiple Crosman models

Cons

• Restricted to muzzle attachment and provides no rear carbine support
• Requires verifying that your 1377 barrel measures exactly 11mm outer diameter

7

Grip Adapter for Crosman

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  Generic

Key specs2

Grip Frame Role

Adapts the standard Crosman grip housing to accept alternative rear grip or stock components.

Stock Modding Potential

• Replaces standard pistol grip panels
• Enables customized rear carbine setups
• Requires verifying frame screw compatibility

Pros & cons32

Pros

• Enables custom grip and rear stock mounting on Crosman airgun frames
• Allows builders to transition from stock grip panels to alternative buttstock configurations
• Matches the Crosman grip layout for streamlined frame customization

Cons

• Listing does not state included fastener hardware or thread pitches
• Construction material and specific stock interface pattern require verification

8

3DEXL Scope Rail Mount Adapter for Crosman 1377, 1322 Weaver

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• Brand
  3DEXL

Key specs2

Compact Rail Length

6.9 inch with 16 slots

Optic Compatibility

Bridges the 17.5mm barrel to accept standard Weaver and Picatinny scope mounts.

Pros & cons32

Pros

• Provides a 6.9 inch rail surface with 16 Picatinny and Weaver slots
• Sized at 17.5mm to fit neatly across Crosman 1377 and 1322 barrels
• Offers raised optic positioning to align eye relief when using a shoulder stock

Cons

• Functions only as an optical rail adapter without shoulder bracing utility
• Clamping fasteners and torque limits are not specified by the manufacturer

9

Picatinny Red Dot Mount Rail for Crosman 2240 1322 1377

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• Brand
  Takteq

Key specs2

Sight Dovetail Upgrade

Directly swaps for the stock rear sight, providing a Picatinny footprint without steel breech upgrades.

Component Material

Nylon polymer

Pros & cons42

Pros

• Replaces the factory rear sight to mount red dot optics without buying a steel breech
• Constructed from lightweight nylon polymer to keep receiver balance light
• Compatible across 1377, 1322, 2240, 1399, and 362 airgun platforms
• Simplifies sight upgrades for shooters converting their pistol into a stocked carbine

Cons

• Nylon polymer base offers less rigidity than CNC aluminum under heavy optic weight
• Offers a short rail section suitable for compact red dots rather than full scopes

10

Clevercraft Scope Mount for 1377/1322 / American Classic Crosman Airguns

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• Brand
  Clevercraft LLC

Key specs1

Platform Alignment

Tailored to American Classic Crosman pumpers to mount sights without altering the base barrel.

Pros & cons32

Pros

• Designed specifically for Crosman 1377, 1322, and American Classic pump platforms
• Secures optics above the barrel to achieve comfortable eye level on carbine builds
• Eliminates guesswork when mounting sights on factory American Classic receivers

Cons

• Provides optic clamping only, without providing a rear shoulder stock point
• Listing does not state rail width, clamp count, or overall mount length

11

SQOTDR Air Transfer Port for Crosman/Pistol 1377 1322 2240 2300

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  SQOTDR

Key specs2

Internal Sealing

Directs compressed air from the valve into the breech assembly during the firing cycle.

Platform Coverage

• Compatible with Crosman 1377 and 1322
• Fits 2240, 2250, and 2289 models
• Requires internal receiver disassembly

Pros & cons32

Pros

• Fits an extensive range of Crosman pump and CO2 airgun models including the 1377
• Serves as an essential internal sealing component between valve and breech
• Maintains consistent air routing during each pneumatic pump discharge

Cons

• Internal airgun seal that provides zero exterior stock or rail functionality
• Requires full breech disassembly to install inside the airgun

12

Rear Sight Elevator Ramp Replacement for Crosman 760, 2100, 1377,

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  Takteq

Key specs2

Elevation Adjustment

Stepped ramp for factory sights

Rear Sight Function

Restores factory stepped elevation control on classic Crosman open rear sight leaves.

Pros & cons32

Pros

• Direct replacement for lost or damaged factory sight elevator ramps
• Enables stepped elevation adjustments on original open rear sights
• Fits multiple Crosman platforms including 1377, 1322, 760, and 2100 airguns

Cons

• Does not adapt the frame for a carbine stock or optic mounting
• Retains the low factory sight line which can feel cramped when shouldered

13

Ghost Ring Rear Sight for Crosman 2240, 1377, 1322 Air

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  Takteq

Key specs2

Aperture Design

Fixed ghost ring peep

Sight Alignment

Offers a rapid peep picture on steel breech models to enhance aim when shooting from the shoulder.

Pros & cons42

Pros

• Fixed ghost ring aperture speeds up target acquisition over standard open notch sights
• Compatible with steel breeches on 1377, 1322, and 2240 air pistols
• Molded from durable nylon polymer and manufactured in the USA
• Provides a natural sight window that pairs cleanly with shoulder-mounted carbines

Cons

• Fixed peep aperture does not provide micro-adjustable windage clicks
• Requires a compatible steel breech dovetail rather than factory plastic sights

14

SQOTDR Short Style Black Aluminum Alloy Dovetail Groove Breech for

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• Brand
  SQOTDR

Key specs2

Breech Material

Black aluminum alloy

Receiver Architecture

Replaces plastic breeches with an aluminum dovetail receiver to anchor scopes and stiffen the barrel.

Pros & cons42

Pros

• Rigid black aluminum alloy construction replaces factory plastic receiver breeches
• Integrated dovetail groove provides a solid mounting base for scopes and sights
• Short style layout fits compact carbine builds across 1377, 1322, and 2240 airguns
• Enhances barrel clamping to eliminate receiver flex during pump strokes

Cons

• Focuses on upper receiver mechanics rather than providing a buttstock mount
• Requires complete teardown of the barrel and bolt assembly for installation

15

SQOTDR Metal Band for Crosman Pumper Longer Barrel Than 1377

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• Brand
  SQOTDR

Key specs2

Extended Barrel Fit

Longer than standard 1377/1322

Front Tube Support

Clamps extended custom barrels securely to the pump reservoir while retaining a front iron sight.

Pros & cons32

Pros

• Metal construction provides sturdy barrel-to-pump-tube bracing
• Engineered specifically for extended custom barrels longer than stock 1377 and 1322 lengths
• Includes an integrated front sight blade for shooters retaining iron sights

Cons

• Not designed for standard length factory barrels on stock 1377 pistols
• Does not attach or adapt rear stocks for shoulder bracing

Last update on 2026-10-12 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Does a shoulder stock bolt directly to the Crosman 1377 grip frame without drilling?

Yes, dedicated parts like the Crosman 1377 Custom Shoulder Stock or a Grip Adapter for Crosman mount directly into the factory grip screw holes. You remove the stock plastic grip panels and use the existing screw locations on the metal frame to secure the unit. This allows you to convert the pistol into a steady carbine without drilling, cutting, or making permanent frame modifications.

Will installing a shoulder stock interfere with the pump stroke?

No, a compatible shoulder stock attaches to the rear grip frame and extends backward, leaving the forward pump handle completely clear. The multi-pump pneumatic forearm swings through its entire stroke under the barrel without contacting the stock extension. You only need to verify that your support hand has clean clearance around the trigger guard during high-effort pumping strokes.

Do you need a raised optic rail to aim comfortably after adding a stock?

It depends on your sighting setup and cheek weld height. A shoulder stock positions your cheek higher than shooting the pistol at arm's length, which can make aligning low factory iron sights awkward. Adding a 3DEXL Scope Rail Mount Adapter in 8 1/4-inch or 6.9-inch lengths, or a nylon polymer Picatinny Red Dot Mount Rail, provides elevated mounting for optics. If you want a dedicated platform with elevated sightlines, checking out a tactical air rifle can help you decide whether a carbine conversion or a purpose-built rifle fits your shooting style.

How does a stock adapter differ from a front barrel or silencer adapter?

A stock adapter attaches exclusively to the rear grip frame to anchor a shoulder mount, whereas barrel adapters clamp to the muzzle end. Hardware like the Crosman 1377/1322 UNI Suppressor Adapter or the stainless steel silencer adapter with 1/2 20 UNF threads for 11mm barrels fits front barrel assemblies. Mixing up these parts can cause mounting confusion, especially when looking at components like an SQOTDR metal band, which supports barrel stability rather than shoulder bracing.

Can you mount an optic to a 1377 carbine without buying a steel breech?

Yes, you can install optics rails directly over the factory plastic breech without upgrading the receiver. The Picatinny Red Dot Mount Rail serves as an easy install rear sight replacement made from nylon polymer with no steel breech required, while the Clevercraft Scope Mount clamps securely onto 1377 American Classic barrels. For airgunners who also practice target shooting with a CO2 BB gun, these clamp-on rails offer an accessible way to mount red dot optics before deciding on a heavier aluminum alloy dovetail groove breech.

How do you prevent shoulder stock wobble on a Crosman 1377?

Stock wobble is prevented by securing the grip screws firmly into the frame bushings and ensuring the adapter contour seats flush against the metal frame. Using an exact-fit Crosman 1377 Custom Shoulder Stock or a rigid Grip Adapter for Crosman eliminates play when torqued properly. If you notice movement under shoulder pressure, inspect the screws for loose fitment and confirm that the adapter is seated evenly without binding the internal trigger linkage.