← Ruger PC Carbine reference page · This work order as JSON ·
Work order — Ruger PC Carbine
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: high.
| Work order # | |
|---|---|
| Customer | |
| Model on the bench | |
| Serial number | |
| Finish / colour | |
| Received | |
| Technician |
Before you startEducational 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.
- This work order is written for the Ruger PC Carbine. It is reported to cover Ruger PC Charger (pistol variant); Ruger PC Carbine in .40 S&W — if the firearm on the bench is one of those, check the torque notes: values do not always carry over.
Shop difficulty: Tier 2 of 3
96 pieces, which is high for a long gun, with about six plungers or detents. Most of it goes in order. The traps are a flying extractor, a heavy bolt spring, and the takedown adjustment knob, which has to be re-set for lock-up. 86 parts (Complete carbine (86 line items)). Pew-Takedown's rating, not the manufacturer's.
Bench time: strip ~45 min, rebuild ~65 min (estimate). Actual: strip ______ rebuild ______
Special tools:
- 5/32 in and 1/8 in hex wrenches — Forend, stock and handguard screws
- pin punches — Trigger guard cross pins and extractor pin
Watch for:
- The extractor and its spring fly out of the bolt when the extractor pin is drifted unless they are held. (disassembly; Sturm, Ruger & Co., Inc.)
- The bolt runs on a heavy recoil spring and slams shut on fingers. (both; Sturm, Ruger & Co., Inc.)
Tools
- 5/32" hex wrench — Loosening the forend takedown screw and the two stock takedown screws. Not needed for the barrel takedown itself.
- 1/8" hex wrench — Removing the four handguard screws on handguard-equipped models.
- T10 Torx wrench — Removing the two front sight screws on handguard-equipped models.
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.
- Pull the charging handle fully to the rear and lock the bolt open by pressing up on the bolt stop.
- Visually confirm there is no cartridge in the chamber, using a light.
Warning: Ruger's own disassembly warning is explicit: unload the firearm before cleaning, lubrication, disassembly or assembly. - Place the safety in the "ON" position if the hammer is cocked, and remove all live ammunition from the work area.
2. Disassemble
Manufacturer's video: Ruger® PC Carbine™ Disassembly Tech Tip (RugerFirearms)
https://www.youtube.com/watch?v=U6LLiKuM4Kc
Ruger® PC Charger™ Disassembly Tech Tip (RugerFirearms)
https://www.youtube.com/watch?v=bMEl8JJ7cLM
Field Strip — Barrel Assembly Removal
- Complete the Clear and Make Safe procedure. Leave the bolt locked back — the barrel assembly will not release with the bolt closed.
- Push the locking lever forward to unlock the barrel assembly.
Warning: Forward, not rearward. The lever unlocks the joint; it does not need to be pushed back or pulled. - While holding the locking lever forward, rotate the barrel assembly counterclockwise and pull it out of the receiver.
Tip: Counterclockwise to remove, clockwise to install. Ruger illustrates both directions. - Retract the charging handle fully rearward and slowly release it until the bolt comes to rest in its forward position.
Warning: Do not leave the bolt locked back on the separated receiver. - Clean the bore from the breech end of the separated barrel, and clean the bolt face, chamber and receiver interior.
Tip: This is the extent of disassembly Ruger describes for routine inspection, cleaning and lubrication.
Barrel / Forend Separation
- Complete the barrel assembly removal first.
- Use a 5/32" hex wrench to loosen — do not remove — the takedown screw in the forend.
- Slide the barrel out of the forend.
- To reassemble, insert the barrel into the forend and tighten the takedown screw with the 5/32" hex wrench.
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 |
|---|---|---|---|
| Barrel assembly | |||
| Forend |
| Component | Material | Factory finish | Source |
|---|---|---|---|
| Receiver Model 19100 | Aluminum Alloy | Type III Hard-Coat Anodized | [2] |
| Receiver Model 19100 | aerospace-grade aluminum billet | Type III hard-coat anodized | [2] |
| Barrel Model 19100 | chrome-moly steel | — | [2] |
| Bolt Model 19100 | chrome-moly steel | — | [2] |
| Stock Model 19100 | glass-filled nylon | — | [2] |
The manufacturer's full parts list (86 parts) is on the reference page.
4. Reassemble
Manufacturer's video: Ruger® PC Carbine™ Reassembly Tech Tip (RugerFirearms)
https://www.youtube.com/watch?v=h_o_kVWlYKY
Ruger® PC Carbine™ Bolt Lock Assembly Tech Tip (RugerFirearms)
https://www.youtube.com/watch?v=r9C6b8tmNhE
Ruger® PC Charger™ Reassembly Tech Tip (RugerFirearms)
https://www.youtube.com/watch?v=zPLlE9nhxm0
Reassembly and Lock-Up Adjustment
- If this is the first time the barrel assembly is being installed, or the fit needs correcting, loosen the adjustment knob by turning it counterclockwise as far as finger pressure allows.
Tip: Ruger's instruction: after the first adjustment, later installations need only the insert-and-rotate step. - Lock the bolt back with the bolt stop engaged.
- Insert the barrel assembly into the receiver and rotate it clockwise until it locks into place.
Warning: Clockwise to install. The locking lever does not need to be held for installation. - Tighten the adjustment knob by rotating it clockwise until the barrel assembly is securely connected.
Warning: You should feel some resistance turning the barrel assembly into the receiver, but it should not be difficult. If it is, remove the assembly and back the knob off. - Dry cycle the action to seat the barrel assembly: with no magazine and an empty chamber, pull the bolt handle fully to the rear while holding the bolt lock up, then release it and let it slingshot forward. Repeat two or three times.
Tip: Ruger states this seating cycle gives the best fired-shot accuracy after a barrel installation. - Perform the function check before any live firing.
5. Torque
| Fastener | Specification | Sequence | Source | Applied | Init. |
|---|---|---|---|---|---|
| Stock takedown screws (2) | 65 in-lb 7.3 N·m · 5.4 ft-lb |
[1] p. 18 | |||
| Magazine release cap head screw | 15 in-lb 1.7 N·m · 1.2 ft-lb |
[1] p. 19 | |||
| Charging handle cap screw | 65 in-lb 7.3 N·m · 5.4 ft-lb |
With the bolt closed, align the conical base of the charging handle with the countersink on the bolt through the receiver slot before tightening. Ruger says to verify this torque every 1,000 rounds or whenever the charging handle is removed and reinstalled. | [1] p. 20 | ||
| Handguard screws (4) Models with handguard |
45 in-lb 5.1 N·m · 3.7 ft-lb |
Slide the handguard on without letting it touch the barrel, sight cutouts at 12 o'clock, then tighten the four screws in an alternating sequence with a 1/8" hex wrench. | [1] p. 40 | ||
| Front sight screws (2) Models with handguard |
20 in-lb 2.3 N·m · 1.7 ft-lb |
Slide the front sight on from the muzzle end and use a T10 Torx wrench. | [1] p. 41 |
Reported by other sources — not the manufacturer
Not a manufacturer specificationConfirm with the manufacturer or a licensed gunsmith before use. Where these differ from a manufacturer value above, the manufacturer wins.
| Fastener | Reported value | Sequence | Source | Applied | Init. |
|---|---|---|---|---|---|
| Receiver screws (2), 5/32" hex Magpul PC Backpacker Stock (MAG1076) on a Ruger PC Carbine (9mm / .40 S&W) Reported by Magpul Industries (secondary) — not the manufacturer |
65 in-lb 7.3 N·m · 5.4 ft-lb |
[3] PDF p. 1 of 3 (PDF p. 1) | |||
| Forend screw (forend to barrel assembly), 5/32" hex Magpul PC Backpacker Stock (MAG1076) on a Ruger PC Carbine (9mm / .40 S&W) Reported by Magpul Industries (secondary) — not the manufacturer |
65 in-lb 7.3 N·m · 5.4 ft-lb |
[3] PDF p. 1 of 3 (PDF p. 1) | |||
| Receiver-to-chassis 12-24 x 3/4 hex screws (2; replace factory stock screws) Midwest Industries Ruger PC Carbine Take-Down Chassis (MI-RPCC / MI-RPCCSF) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
55 in-lb 6.2 N·m · 4.6 ft-lb |
Threadlocker: Loctite (instructions: 'Degrease screws prior to installing loctite') |
[4] PDF p. 1 (single page) (PDF p. 1) | ||
| AR grip adaptor 1/4-20 x 1.5" screw Midwest Industries Ruger PC Carbine Take-Down Chassis (MI-RPCC / MI-RPCCSF) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
35 in-lb 4 N·m · 2.9 ft-lb |
Threadlocker: Blue Loctite may be used |
[4] PDF p. 1 (single page) (PDF p. 1) | ||
| AR grip screw Midwest Industries Ruger PC Carbine Take-Down Chassis (MI-RPCC / MI-RPCCSF) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
45 in-lb 5.1 N·m · 3.7 ft-lb |
[4] PDF p. 1 (single page) (PDF p. 1) | |||
| Hand guard bottom retaining screw (replaces factory forearm screw) Midwest Industries Ruger PC Carbine Extended M-Lok Hand Guard (MI-CRPC9-X) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
55 in-lb 6.2 N·m · 4.6 ft-lb |
[5] PDF p. 1 (single page) (PDF p. 1) | |||
| M-Lok rail section screws Midwest Industries Ruger PC Carbine Extended M-Lok Hand Guard (MI-CRPC9-X) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
15 in-lb 1.7 N·m · 1.2 ft-lb |
[5] PDF p. 1 (single page) (PDF p. 1) | |||
| M-Lok mount cross bolt (on factory lower forearm rail) Midwest Industries MI-PC9M M-Lok Mount on Ruger PC Carbine models 19100, 19101, 19102 Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
50 in-lb 5.6 N·m · 4.2 ft-lb |
[6] PDF p. 1 (single page) (PDF p. 1) | |||
| Bolt (charging) handle screw (factory screw re-used) Midwest Industries Ruger PC9 Bolt Handle on a Ruger PC Carbine Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
65 in-lb 7.3 N·m · 5.4 ft-lb |
Re-check the torque after 1k rounds (instructions step 9). | [7] PDF p. 1 (single page) (PDF p. 1) | ||
| Take down block bolts (factory bolts re-used) Midwest Industries Ruger PC Charger Handguard (MI-RC-4.875) on the Ruger PC Charger (pistol variant) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
45 in-lb 5.1 N·m · 3.7 ft-lb |
Threadlocker: Blue thread locker |
[8] PDF p. 1 (single page) (PDF p. 1) | ||
| Handguard bolt Midwest Industries Ruger PC Charger Handguard (MI-RC-4.875) on the Ruger PC Charger (pistol variant) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
30 in-lb 3.4 N·m · 2.5 ft-lb |
Threadlocker: Blue Loctite |
[8] PDF p. 1 (single page) (PDF p. 1) | ||
| M-Lok rail section bolts Midwest Industries Ruger PC Charger Handguard (MI-RC-4.875) on the Ruger PC Charger (pistol variant) Reported by Midwest Industries, Inc. (secondary) — not the manufacturer |
15 in-lb 1.7 N·m · 1.2 ft-lb |
[8] PDF p. 1 (single page) (PDF p. 1) |
Notes: From Ruger's PC Carbine manual. The barrel assembly itself is not torqued: it rotates into the receiver and its lock-up is set with the adjustment knob, as described in the reassembly procedure.
Fit or check on rebuild
- Barrel lock-up tension (adjustment knob) — The knob must be re-set for firm lock-up.
- Seat the barrel by slingshotting the bolt — Ruger directs it after every barrel installation.
- Function check (safety, trigger reset, feeding, extraction) — Standard after any detail strip. No single source.
6. Function check
- First be sure there is no ammunition in the chamber or magazine, and perform every check with no magazine inserted.
- Bolt: pull the bolt fully to the rear and release it. It should travel freely without binding. Repeat twice more.
- Safety: pull the bolt fully to the rear and release it to cock the hammer. A distinct click should be heard when the safety is moved to either position.
- With the safety "on", attempt to pull the trigger. The trigger should not move and the hammer should not fall.
- Move the safety "off", point in a safe direction and pull the trigger. An audible click indicates the hammer has fallen. Repeat the sequence twice more.
- Bolt lock: retract the charging handle fully, press up on the bolt stop, then release the handle. It should move forward a fraction of an inch and be held open.
- Retract the charging handle fully again and release. The bolt stop should drop and the bolt should run forward.
- Confirm the barrel assembly is locked: it must not rotate or pull free by hand.
If any check fails, the firearm is not safe to fire. Stop and see a licensed gunsmith.
If it won't go back together
| Symptom | Cause | Fix |
|---|---|---|
| The barrel assembly will not go into the receiver, or will not rotate to lock. | The bolt is not locked back with the bolt stop engaged, or the adjustment knob is screwed in too far. | Lock the bolt back and engage the bolt stop, then try again. If it still will not seat, back the adjustment knob off counterclockwise, install the barrel, and retighten the knob. |
| The barrel assembly goes in and locks, but feels loose or rattles. | The adjustment knob is backed off too far. It sets the lock-up tension and stays wherever it was left. | Remove the barrel assembly, tighten the adjustment knob clockwise a little, and reinstall. Ruger's target is noticeable resistance as the barrel turns in, without it being difficult. |
| The barrel assembly will not come out even with the locking lever pushed forward. | The bolt is not locked back, or the assembly is being rotated the wrong way. | Lock the bolt back, hold the locking lever forward, and rotate the barrel counterclockwise — the opposite of the direction that installed it. |
| After reassembly the first shots group poorly. | The barrel assembly has not been seated. | With the rifle empty and no magazine, slingshot the bolt from fully rearward two or three times, as Ruger directs after every barrel installation. |
Sources
- Ruger PC Carbine Instruction Manual — Sturm, Ruger & Co., Inc. primary
https://ruger-docs.s3.amazonaws.com/_manuals/PC-Carbine.pdf - Ruger PC Carbine Autoloading Rifle — Specifications (model 19100) — Sturm, Ruger & Co. primary
https://ruger.com/products/pcCarbine/specSheets/19100.html - Magpul MAG1076 PC Backpacker Stock (Ruger PC Carbine) — Installation Instructions — Magpul Industries secondary
https://magpul.com/media/wysiwyg/Instructions/MAG1076_PC_Backpacker_Stock_INSRT.pdf - Midwest Industries Ruger PC Carbine Take-Down Chassis (MI-RPCC / MI-RPCCSF) — Installation Instructions — Midwest Industries, Inc. secondary
https://midwestindustriesinc.com/content/installation-instructions/Ruger-PC-Carbine-Chassis-Instructions.pdf - Midwest Industries Ruger PC Carbine Extended M-Lok Hand Guard (MI-CRPC9-X) — Installation Instructions — Midwest Industries, Inc. secondary
https://midwestindustriesinc.com/content/installation-instructions/Ruger-Extended-M-Lok-Handguard-MI-CRPC9-X-Instructions.pdf - Midwest Industries MI-PC9M Ruger PC-9 M-Lok Mount (models 19100, 19101, 19102) — Installation Instructions — Midwest Industries, Inc. secondary
https://midwestindustriesinc.com/content/installation-instructions/Ruger-M-Lok-Mount-MI-PC9M-Instructions.pdf - Midwest Industries Ruger PC9 Bolt Handle — Installation Instructions — Midwest Industries, Inc. secondary
https://midwestindustriesinc.com/content/installation-instructions/Ruger-PC9-Bolt-Handle-Instructions.pdf - Midwest Industries Ruger PC9 Charger Handguard (MI-RC-4.875) — Installation Instructions — Midwest Industries, Inc. secondary
https://midwestindustriesinc.com/content/installation-instructions/Ruger-PC9-Charger-MI-RC-4.875-Instructions.pdf - Ruger Patents — Sturm, Ruger & Co., Inc. primary
https://ruger.com/micros/Patents/index.html
| 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.