Smith & Wesson Model 10

moderate
Shop tier 2
medium confidence
Revolver
revolver
double action
service revolver
historic
requires tools

field strip ~3 min · reassembly ~4 min · detail strip ~45 min

Before you begin Verify this firearm is unloaded. Remove the magazine or empty the cylinder or tube, lock the action open, and check the chamber both by sight and by touch. Keep the muzzle in a safe direction and remove all live ammunition from your work area.

Smith & Wesson publishes no owner disassembly Smith & Wesson's revolver manual publishes no takedown. The maintenance it prescribes is cleaning with the cylinder open; it directs anything further to Smith & Wesson or a qualified gunsmith. Any disassembly procedure on this page is not the manufacturer's, and doing it may void a warranty or service agreement. (Smith & Wesson Revolvers (Modern Style) Safety & Instruction Manual — Smith & Wesson mcarbo.com [1])

Specifications

Manufacturer: Smith & Wesson
Origin: United States
Category: Revolver
Action: Double-action revolver
Calibers: .38 Special
Capacity: 6 rounds
Production: 1899–present (in-production)
Also known as: S&W .38 Military & Police, Victory Model (wartime variant), K-frame

Model-specific safety

A revolver is not cleared by opening the cylinder. Rounds can remain in chambers you cannot see from your angle. Look through every chamber, count them, and confirm all six are empty.
Revolver internals are genuinely gunsmith territory. Removing the sideplate to reach the lockwork is easy to do and very easy to do damage with. Unless you know what you are doing, stop at cylinder and yoke removal.
Never pry the sideplate off. It is fitted to the frame. The correct method is to loosen the screws and tap the grip frame with a non-marring mallet until the plate lifts free on its own. Prying leaves permanent marks on a fitted surface.
Smith & Wesson sideplate screws are not interchangeable. Keep them in order and put each one back where it came from.
Never close the cylinder by flicking the wrist. It springs the crane and puts the revolver out of time, which is an expensive repair.

Under spring tension

Rebound slide spring (sideplate removal — it launches)
Mainspring
Cylinder stop spring

Easily lost parts

Yoke retaining screw · Sideplate screws · Rebound slide and its spring · Cylinder stop

Tools

Tool	Required	Used for	Substitute
Hollow-ground gunsmith screwdriver	Yes	The yoke retaining screw. A tapered hardware-store screwdriver will chew the screw head and it will look chewed forever.	None worth using. Buy the right screwdriver.

Shop difficulty

Shop tier 2 Tier 2 — moderate among revolvers, for the full job: strip to the parts that get coated and put it back together working. K-frame sideplate lockwork of about 59 pieces (Army TM count): one tensioned rebound slide spring that flies, a loose hammer block that must be indexed while the sideplate goes on, and a hand spring that must stay engaged. Well documented and tool-light, so moderate rather than hardest.

Parts: 53 numbered parts (complete revolver per the Smith & Wesson section of the Army RPSTL (Figures C1-C8, Groups 00-0206): every piece-part item number, with the assembly headers (C1-2, C1-3, C3-4, C3-10, C3-11, C3-12, C3-1), from TM 9-1005-206-14&P-1, Revolver, Caliber .38 Special: Smith and Wesson Military and Police M10 (and Ruger) - Appendix C, Section II Repair Parts List (archive.org OCR text of the scanned PDF) — Headquarters, Department of the Army (scan hosted by archive.org), PDF pp. 98-108 (C1-1 to C8-1) archive.org [8].

Bench time: about 35 min to strip, 55 min to rebuild (estimate). Estimated for an experienced tech with the right tools: grips, sideplate, lockwork, crane/cylinder, thumbpiece/bolt, locking bolt and sights. Rebuild is longer for the rebound slide spring, hand spring engagement, hammer block and sideplate seating plus a timing/carry-up and end-shake check. The TM work-time figures (hours) are given as a cross-check, not as the job time.

Small parts: 9 pins, 9 springs, 1 detents or plungers (counted by name in the same list (C1-C8): pins = PIN, BARREL; PIN, LOCKING BOLT; PIN, CENTER/PIN, SHOULDER, HEADLESS (C4-6); PIN, EXTRACTOR; PIN, STRAIGHT, HEADLESS (C5-1, C7-3, C8-11); PIN, REBOUND S)

What comes off for coating

Grips and sideplate: stock screw and stocks, sideplate screws (kept in their holes; the front one retains the crane), sideplate (tapped free, never pried), hammer block — fitted hollow-ground screwdrivers, nylon/brass or rawhide mallet
Lockwork: mainspring and strain screw, rebound slide, rebound slide spring and pin, hammer (with sear, stirrup, hammer nose), trigger with hand and hand torsion spring, trigger lever, cylinder stop and cylinder stop spring, trigger stop rod (if fitted), internal-lock flag, spring and cam (IL guns) — rebound slide spring tool or small Phillips screwdriver
Cylinder and crane: cylinder and yoke/crane out of the frame, extractor rod (left-hand thread) and center pin with springs if the cylinder is coated — padded vise or extractor-rod collar tool
Frame: thumbpiece nut and thumbpiece, bolt, bolt plunger and spring, locking bolt, spring and pin (under the barrel), rear sight (adjustable models: leaf, elevation/windage parts, plunger and spring), front sight (pinned or plunger-retained on some models) — punch set, pin punch for sight and locking-bolt pins

Special tools

Rebound slide spring tool (Brownells S&W tool) or a Phillips screwdriver just larger than the spring ID — Compressing and re-seating the rebound slide spring over its stud
Fitted hollow-ground (gunsmith) screwdrivers — Sideplate, strain, thumbpiece and stock screws without burring
Nylon/brass or rawhide mallet — Tapping the frame to lift a tight sideplate
Large clear plastic bag — Containing the rebound spring and small springs on removal

Known pain points

The rebound slide spring is under heavy tension; it launches when the slide is pried off and must be compressed back over its stud on reassembly. (both)
Source: Installing Smith & Wesson Spring Kit — Shooting Times shootingtimes.com [6] — “The best way to remove the rebound slide is to just pry it up a bit, but be aware that the spring is under considerable tension and could do real harm if it hit you in the wrong place.”
The hammer block lies loose under the sideplate and must be seated up on the rebound slide pin while the sideplate is fitted. (reassembly)
Source: Installing Smith & Wesson Spring Kit — Shooting Times shootingtimes.com [6] — “The hammer-block safety will be lying loose under it, so take care to note how it goes in. There is a small pin on the rebound slide where it rides.”
The hand must keep its torsion-spring tension when the trigger goes back in, or the cylinder will not index. (reassembly)
Owners report: Change of a 686 rebound spring — Smith & Wesson Forum smith-wessonforum.com [7] — “make certain you still have spring tension on the hand (some people accidentally pull the hand back too far when removing or installing the trigger, causing the internal stud on the hand to slip past the spring inside the trigger).”
The sideplate must be tapped off the frame, never pried, and the sideplate screws go back in the holes they came from. (disassembly)
Source: Installing Smith & Wesson Spring Kit — Shooting Times shootingtimes.com [6] — “It might seem logical to pry it off; however, that is absolutely the wrong way to do it and can damage the gun. Instead, tap gently on the frame just below the sideplate with a brass or nylon hammer, and it will pop right up and can be lifted off.”
Smith & Wesson tells owners not to go beyond the field strip; lockwork work is for a qualified gunsmith. (both)
Source: Safety & Instruction Manual, Revolvers - Modern Style - J, K, L and N Frame (p/n 416560000, REV S&W_REVOLVER_112119), linked from smith-wesson.com revolver product pages — Smith & Wesson smith-wesson.canto.com [2] — “NEVER DISASSEMBLE YOUR FIREARM beyond the field stripping procedure outlined in this manual. Improper disassembly or reassembly of your firearm may be dangerous and can lead to serious injury or death.”

Fit or check on rebuild

Timing / carry-up: each chamber must lock before the hammer falls, single and double action — The hand torsion spring must engage the hand; a hand pulled back too far loses spring tension and the cylinder will not index.
Source: Change of a 686 rebound spring — Smith & Wesson Forum smith-wessonforum.com [7] — “make certain you still have spring tension on the hand (some people accidentally pull the hand back too far when removing or installing the trigger, causing the internal stud on the hand to slip past the spring inside the trigger).”
Cylinder gap (barrel-cylinder) and end shake; crane alignment — The Army issues gauges for exactly these checks when the cylinder/yoke group is replaced.
Firing-pin (hammer-nose) protrusion and hammer-block function — Same TM lists a firing-pin protrusion gauge; the hammer block must ride up on the rebound slide pin before the sideplate goes on.
Source: Installing Smith & Wesson Spring Kit — Shooting Times shootingtimes.com [6] — “The hammer-block safety will be lying loose under it, so take care to note how it goes in. There is a small pin on the rebound slide where it rides.”
Sideplate seats flush with no forcing; strain screw fully tightened — A sideplate that is not flush binds the grips and parts behind it; a backed-out strain screw gives light strikes (well-known S&W check).
Trigger reset with the rebound spring fitted — The rebound slide spring is also the trigger return spring.
Source: Installing Smith & Wesson Spring Kit — Shooting Times shootingtimes.com [6] — “The downside is that the rebound also serves as the trigger return spring”

This is Pew-Takedown's rating, not the manufacturer's. How tiers are rated. Forum reports are owners' experience, not specifications.

Manufacturer videos

Official videos from Smith & Wesson's own channels, linked rather than copied. Where a video and the steps on this page differ, follow the manufacturer's manual and video.

How To Clean a Revolver | Smith & Wesson® Smith & Wesson cleaning, maintenance · 2026-02-23
Covers: Revolvers in general (S&W's own generic guide; no model named in title/description)
Unloading & Reloading Revolvers Smith & Wesson clearing, operation · 2021-07-13
Covers: Revolvers in general (GUNSMARTS series, Jerry Miculek; no model named)

Procedures

Clear and Make Safe

Clear & Make Safe

Manufacturer’s video: Unloading & Reloading Revolvers Smith & Wesson

Point the muzzle in a safe direction and keep your finger off the trigger.
Push the thumbpiece forward and swing the cylinder out to the left.
Press the ejector rod firmly to eject all cartridges or cases from the chambers.
TipPoint the muzzle up and strike the rod briskly with the palm so the cases clear fully.
Removed at this step: Cartridges or cases
Look through every chamber, one at a time, and confirm each is empty.
WarningAll six. A revolver with one loaded chamber looks identical to an empty one from most angles.
Confirm the chamber-to-barrel gap area and the bore are clear of obstruction.
Remove all live ammunition from the work area.

Routine cleaning (what Smith & Wesson documents)

Field Strip tools required

S&W's revolver manual publishes no takedown. This is the maintenance it does prescribe.

Complete the Clear and Make Safe procedure and leave the cylinder swung out.
Clean the bore and each chamber with a solvent-wetted patch and bronze brush, then dry patches until they come out clean.
Clean the front face of the cylinder, the forcing cone, and the recoil shield, where fouling and lead build up fastest.
Restrict your choice of solvent to products made for firearms, and avoid prolonged solvent immersion or ultrasonic cleaning — S&W records finish damage from both.
WarningNever use ammoniated or other strong alkaline solvents on a Smith & Wesson.
TipS&W's rule of thumb: if you would be happy putting it on your car's paint, it is probably safe on the gun.
Come back in 24 to 48 hours. Residue works its way out of the barrel and chambers after the first clean; remove it with a bristle brush and a light re-application of solvent, then re-oil.
Apply a light film of good gun oil to all external metal surfaces and wipe clean. In cold climates use an oil that will not thicken.
Stop here. S&W publishes no disassembly procedure for this revolver and directs additional maintenance to a qualified gunsmith.

Remove the side plate and strip the lockwork

Detail Strip tools required gunsmith recommended

Para 6-11, 'Maintenance of Receiver Assembly' (S and W column): grips and cylinder/yoke off, side plate tapped free, then hammer block, mainspring, hammer, rebound slide, trigger assembly and cylinder stop. This goes past where the entry's Sideplate Removal procedure stops. TM 9-1005-206-14&P-1 assigns this to direct support maintenance (MAC column F; receiver-assembly repair also has a general support (H) allowance). Operator maintenance is limited to inspecting, lubricating, servicing and troubleshooting, and organizational maintenance to grips and minor hardware.

Follows TM 9-1005-206-14&P-1 Operator's, Organizational, Direct Support, and General Support Maintenance Manual Including Repair Parts and Special Tools List for Revolver, Caliber .38 Special: Smith and Wesson, Military and Police, M10 (Round Butt 4-inch and 2-inch Barrel; Square Butt 4-inch Barrel) and Rev — Headquarters, Department of the Army, para 6-11, pp. 6-18 to 6-23 archive.org [4]