← Bersa Thunder 380 reference page · This work order as JSON ·
Work order — Bersa Thunder 380
Taking the firearm apart for a job such as refinishing, and putting it back together to specification. Generated from the Pew-Takedown entry last updated 2026-10-29. Confidence: medium.
| Work order # | |
|---|---|
| Customer | |
| Model on the bench | |
| Serial number | |
| Finish / colour | |
| Received | |
| Technician |
- Bersa limits owner disassembly: Field strip only: magazine out, slide pulled back, lifted and slid forward off the fixed barrel, recoil spring off the barrel.
- This work order is written for the Bersa Thunder 380. It is reported to cover Bersa Thunder 380 CC; Bersa Thunder Plus — if the firearm on the bench is one of those, check the torque notes: values do not always carry over.
- No torque values are recorded for this firearm. Get them from the manufacturer or a gunsmith; do not estimate.
Shop difficulty: Tier 2 of 3
58 line items in Bersa's numbered list; a Walther PPK-pattern DA/SA blowback with a barrel pinned to the frame and a built-in key lock (SBI) that Bersa calls extremely laborious and nearly impossible to remove without damage. Moderate part count, a couple of real traps, no timing. 58 parts (Complete pistol incl. magazine; the parts list on this page = Spanish 'Denominacion de las piezas', Modelos Thunder 380 / 380 Combat / 22 (numbered exploded view); 58 pieces). Pew-Takedown's rating, not the manufacturer's.
Bench time: strip ~30 min, rebuild ~45 min (estimate). Actual: strip ______ rebuild ______
Special tools:
- Punch set incl. a long barrel-pin punch — Barrel pin if the barrel is separated from the frame
- Bersa SBI key (supplied hex key) — Locking/unlocking the integral lock; no standard tool fits
Watch for:
- The barrel is fixed to the frame by a pin (PPK-style), so the barrel and frame stay together unless the barrel pin is driven out. (disassembly; Bersa S.A.)
- The recoil spring is tapered and goes on the fixed barrel one way only, large end toward the muzzle. (reassembly; Canadian Gun Nutz)
1. Clear and make safe
- Point the muzzle in a safe direction and keep your finger off the trigger.
- Press the magazine release and remove the magazine.
- Retract the slide fully to eject any chambered round and lock it open.
- Visually inspect the chamber and magazine well, then physically feel the chamber to confirm it is empty.
Warning: Look and feel. Both, every time. - Remove all live ammunition from the work area.
2. Disassemble
Manufacturer's video: Limpieza Bersa Thunder 380/22 (Bersa Oficial)
https://www.youtube.com/watch?v=Cd7puAuYios
Pistola BERSA thunder 380 cambió percutor (Bersa Oficial)
https://www.youtube.com/watch?v=DvoCLA0PQps
Field Strip
- Complete the Clear and Make Safe procedure and let the slide forward.
- Pull the front of the trigger guard straight down and offset it to one side so it rests against the frame.
- Pull the slide fully to the rear past its normal travel.
- Lift the rear of the slide up to clear the frame rails and ease it forward off the barrel.
Warning: Lift the rear first. The recoil spring is compressed. - Slide the recoil spring off the barrel.
- Return the trigger guard to its normal position.
3. Refinish
The components the procedures above separate. Coating, masking and cure are outside this database; follow your coating system's instructions. A part the manufacturer marks "factory fit" should not be swapped or reworked.
| Component separated | Out | Coated | Back in |
|---|---|---|---|
| Slide | |||
| Recoil spring |
| Component | Material | Factory finish | Source |
|---|---|---|---|
| Frame Thunder 380, SKU T380M8 | Alloy | — | [3] |
| Slide Thunder 380, SKU T380M8 | Steel | — | [3] |
| Whole firearm Thunder 380 (colour options Nickel, Pink, Robins Egg Blue, Two Tone; Black) | — | Cerakote or Anodized | [3] |
| Grips | Checkered Polymer | — | [3] |
The manufacturer's full parts list (58 parts) is on the reference page.
4. Reassemble
Manufacturer's video: Limpieza Bersa Thunder 380/22 (Bersa Oficial)
https://www.youtube.com/watch?v=Cd7puAuYios
Pistola BERSA thunder 380 cambió percutor (Bersa Oficial)
https://www.youtube.com/watch?v=DvoCLA0PQps
Reassembly
- Pull the trigger guard down and offset it against the frame.
- Slide the recoil spring onto the barrel in its correct orientation.
- Set the slide over the barrel and push it rearward, compressing the spring.
- With the slide fully rearward, press its rear down onto the frame rails until it seats.
Tip: The hammer must be down or the slide will not seat. - Ease the slide forward and snap the trigger guard back up into position.
Warning: Confirm the trigger guard is fully seated before the pistol goes back into service. - Rack the slide several times and perform the function check.
5. Torque
No manufacturer torque values are recorded for this firearm.
Fit or check on rebuild
- Recoil spring orientation — Tapered spring, large end to the muzzle
- Barrel alignment if the barrel pin was driven — The barrel is fixed to the frame by a pin; any removal needs re-pinning tight with the barrel indexed
- Full function check (trigger reset, safeties, slide lock-back, drop of striker/hammer only on trigger) — Standard after any fire-control strip; confirms springs and sears went back correctly
6. Function check
- Verify the pistol is unloaded with no magazine inserted before each check.
- With the hammer down, press the trigger for a double-action hammer fall.
- Cock the hammer, operate the safety or decocker as fitted, and confirm the expected behaviour.
- Rack the slide and press the trigger for a single-action break.
- Hold the trigger back, rack the slide, release slowly and confirm the reset.
- Confirm the slide locks open on an empty magazine and the magazine drops free.
- With a magazine disconnect fitted, confirm the trigger is disconnected with the magazine removed. This is not a clearing check.
If any check fails, the firearm is not safe to fire. Stop and see a licensed gunsmith.
Sources
- Bersa Thunder 380 Owner’s Manual — Bersa S.A. primary
- Thunder Series — Manual de Instrucción y Seguridad — Bersa S.A. primary
https://bersa.com.ar/wp-content/uploads/2025/01/Thunder-espanol-baja.pdf - Thunder 380 — Specification (SKU T380M8) — Bersa USA primary
https://bersausa.com/product/thunder-380/ - bersa thunder .380 ongoing problems — Canadian Gun Nutz anecdotal
https://www.canadiangunnutz.com/forum/threads/bersa-thunder-380-ongoing-problems.2409063/
| Reassembled and function-checked by | Date |
|---|
Educational guide only. Some information comes from non-authoritative sources. Always consult your manufacturer's manual and a licensed gunsmith. Verify your firearm is unloaded before every procedure. Full disclaimer: https://github.com/Fundamental-build-LLC/Pew-Takedown
Legal notice: this material is third-party information compiled from sources of varying reliability and is provided for general informational and educational purposes only. It is not gunsmithing, technical, safety or legal advice, it is not verified or endorsed by any manufacturer, and it must not be taken as fact. Any work on a firearm beyond the routine field stripping described in its own owner's manual should be performed only by a licensed and insured gunsmith. You use this material entirely at your own risk. Fundamental Build LLC and the project's contributors make no warranty of any kind and accept no liability for death, injury, damage or loss arising from its use. Full terms: LEGAL.md.