PT-1 / PT-1S / PT-3 / PT-3S Stock Adapters — Overview and Selection Guide


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Types of adapters (brief classification)

1. Adapter for AKS / AKS-74U


  • Stock axis diameter: 4.5 mm
  • Designed for the folding tubed stocks of this family.
  • Compatibility: PT-1, PT-1S, PT-3, PT-3S (unless otherwise noted).

2. Adapter for AK (combat models, with the ability to fire with folded stock)


  • Stock axis diameter: 5.5 mm
  • Allows firing with the stock folded (side-firing capability).

3. Adapter for civilian rifled carbines based on the AK (no ability to fire with folded stock)


  • Stock axis diameter: 5.5 mm
  • Not intended for firing with the stock folded (the stock is fixed in the operating position).

4. Adapter for Saiga-9


  • Stock axis diameter: 5.5 mm
  • For Saiga-9; no ability to fire with the stock folded.

5. Adapter for Ten?-19


  • Special adapter for this model (diameter and construction per the productÂ’s technical specification).

6. Fixed adapter for AKM (non-folding)


  • Material: D16T alloy (aluminum alloy)
  • Feature: fixed — not compatible with PT-3 and PT-3S. Compatible with PT-1.
  • Used on AKM and carbines based on AKM.

Compatibility table (quick reference)

Adapter / Weapon modelAxis (mm)Folding?Compatible with PT-1 / PT-1SCompatible with PT-3 / PT-3S
AKS / AKS-74U4.5YesYesYes
AK (combat models, firing with folded stock)5.5Yes (supports firing)YesYes
Civilian carbines based on AK (no firing with folded stock)5.5No (fixed)YesYes
Saiga-95.5NoYesYes
Ten?-19(per tech spec)Depends on versionYesYes
Fixed adapter for AKM (D16T alloy)(AKM standard)NoYes (PT-1)No (PT-3 / PT-3S incompatible)

Note: Except for the fixed AKM adapter, other adapters are generally compatible with both types of stocks (PT-1 and PT-3) unless explicitly stated otherwise.

Materials and operating parameters

  • Adapter material: steel for folding adapters; fixed AKM adapter — D16T alloy.
  • Operating temperature range: ?50 Â°C to +50 Â°C.
  • Guaranteed storage and service life: 60 months.

How to choose (step-by-step)

  1. Identify your weapon model and whether it supports a folding stock.
    • If you have an AKS or AKS-74U — choose the adapter with a 4.5 mm axis.
    • For most combat AKs and some carbines — use 5.5 mm axis adapters.
    • For Saiga-9 — use the dedicated Saiga adapter (5.5 mm).
    • For AKM — if you need the fixed version, choose the fixed adapter (D16T) and remember it is not compatible with PT-3/PT-3S.
  2. Decide whether you need the ability to fire with the stock folded.
    • If yes — choose the AK combat adapter that supports firing with the stock folded.
    • If no — civilian/fixed adapters will be suitable.
  3. Specify your weapon model when ordering a stock.

    Adapters usually come with the stock, but you must indicate your weapon model clearly so the correct adapter is included.

Installation and kit contents

  • Adapters are included in the stock package (PT-1, PT-1S, PT-3, PT-3S) when purchased — specify your weapon model at checkout.
  • The fixed AKM adapter is noted separately in the kit and is compatible only with PT-1.
  • Installation is normally done with standard tools; some models may require minor adjustments or professional assistance.

Seller recommendations / text for product listing

Always indicate: weapon model, year (if applicable), whether firing with a folded stock is required, and compatibility with PT-1 / PT-3.

Example listing line:

“Adapter included — choose: AKS (4.5 mm), AK (5.5 mm, folding with fire), Saiga-9 (5.5 mm), Ten?-19, Civil AK (5.5 mm, non-firing when folded), Fixed AKM (D16T, PT-1 only).”

Conclusion and order checklist

Before ordering, make sure you have:

  1. The exact weapon model (for example, AKS-74U, Saiga-9, AKM, etc.).
  2. Determined whether you need the ability to fire with the stock folded.
  3. Confirmed which stock version you are buying (PT-1 / PT-3 and their S variants) to avoid incompatibility (fixed AKM adapter ? PT-3/PT-3S).
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Tags #PT1 #PT1S #PT3 #PT3S #StockAdapters #AK #AKS74U #AKM #Saiga9 #Ten19 #FoldingStock #FoldFire #AxisDiameter #D16T #InstallationGuide #KitContents #ProductListing #BuyerChecklist #WeaponAccessories #ArmorerTips