Pew-Takedown
Guide only. 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. Read the full disclaimer.

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Ruger Mini Thirty

field strip ~5 min · reassembly ~8 min · detail strip ~30 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.
Sturm, Ruger & Co. limits owner disassembly The maker's own procedure goes as far as: Trigger housing, barreled action out of stock, recoil spring and guide rod, slide, bolt, and bolt stop; gas block stays on.. Ruger says removing the gas block is not advisable and any disassembly beyond its field strip should only be done by a trained armorer experienced in firearms repair. (Instruction Manual for Ruger Mini Thirty Rifles — Sturm, Ruger & Co., Inc., p. 26 ruger-docs.s3.amazonaws.com [1])

Specifications

Manufacturer
Sturm, Ruger & Co.
Origin
United States
Category
Rifle
Action
Gas, short-stroke piston
Calibers
7.62x39mm
Capacity
5 or 20 rounds depending on magazine
Production
1987–present (in-production)
Also known as
Mini-30

Model-specific safety

Under spring tension

Easily lost parts

Slide (operating rod) · Recoil spring guide · Bolt lock plunger

Tools

No tools required for the field strip.

Shop difficulty

Shop tier 3 Tier 3 — hardest among rifles and carbines, for the full job: strip to the parts that get coated and put it back together working. The same M14-pattern action as the Mini-14, with 71 pieces. It has the strongly compressed recoil spring, the held bolt-lock plunger, the trigger group's pinned hammer spring and slave pin, and a gas block Ruger says needs factory fixtures.

Parts: 63 numbered parts (Complete Mini Thirty, all stock variants in one list (63 line items)), from Instruction Manual for Ruger Mini Thirty Rifles — Sturm, Ruger & Co., Inc., p. 36–40 ruger-docs.s3.amazonaws.com [1].

Bench time: about 60 min to strip, 90 min to rebuild (estimate). Same scope as the Mini-14.

Small parts: 7 pins, 6 springs, 4 detents or plungers (counted from the manufacturer's parts list (one per key number unless a quantity is given))

What comes off for coating

Special tools

Known pain points

Fit or check on rebuild

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

Procedures

Clear and Make Safe

Clear & Make Safe
  1. Point the muzzle in a safe direction and keep your finger off the trigger.
  2. Press the magazine release and rock the magazine forward and out.
    Removed at this step: Magazine
  3. Pull the operating rod handle fully rearward and lock the bolt open.
  4. Inspect the chamber and magazine well and physically confirm the chamber is empty.
  5. Engage the safety inside the front of the trigger guard and remove all live ammunition from the work area.

Field Strip

Field Strip
  1. Complete the Clear and Make Safe procedure with the safety ON. Work on a bench covered with an old blanket or shallow-nap rug so the rifle does not slide or get scratched.
  2. Pull the slide handle all the way to the rear and release it. The hammer must be cocked and the safety must be ON for both disassembly and reassembly.
    WarningConfirm the chamber is empty again before you release the slide.
    TipHammer cocked, safety on. The Mini-14 will not come apart or go together otherwise.
  3. Insert a 1/4 in steel rod, punch, or screwdriver shank into the hole in the rear of the trigger guard and use it as a lever to spring the trigger guard open from its latched position.
    WarningDo not use a cartridge as the lever. Ruger warns against it because it can loosen the bullet in the case.
    TipA quarter-inch rod. Anything much smaller will not give you the leverage and will mar the hole.
  4. Invert the rifle and carefully pull the trigger housing assembly upward and out.
    TipTake care not to damage the stock on the way out — or on the way back in.
    Removed at this step: Trigger housing assembly
  5. Remove the barrel and receiver assembly from the stock by swinging the rear end away from the action slightly, then pulling the stock out of engagement with the gas block.
    Removed at this step: Stock
  6. Remove the guide rod and recoil spring.
    WarningThe recoil spring is heavily compressed. Wear eye protection and keep control of it — the guide rod and spring can escape forcibly and cause injury.
    Removed at this step: Guide rod Recoil spring
  7. Pull the slide handle to the rear, align the locking projections on the slide with the disassembly notch on the receiver, and remove the slide.
    Removed at this step: Slide
  8. Pull the bolt forward until it can be pivoted out of the receiver, align the firing pin projection with the slot in the lower receiver bridge, and lift the bolt out.
    Removed at this step: Bolt
  9. Stop here. Removal of the bolt stop assembly is not normally required for routine cleaning, and Ruger states that removing the gas block is neither necessary nor advisable.

Reassembly

Reassembly
  1. Confirm the hammer is cocked and the safety is ON before you begin. This is a precondition, not a courtesy.
  2. Align the bolt's firing pin projection with the slot in the lower receiver bridge, set the bolt into the receiver, and pivot it into its raceway.
  3. Align the slide's locking projections with the disassembly notch, fit the slide, and run it forward to engage the bolt.
  4. Fit the guide rod and recoil spring.
    WarningSame heavily compressed spring, same eye protection, same care. It goes in under more control than it came out.
  5. Set the barrel and receiver assembly back into the stock, engaging the gas block first and then swinging the rear down.
  6. Seat the trigger housing assembly into the receiver, taking care not to damage the stock, then swing the trigger guard closed and latch it fully.
  7. Cycle the action several times and perform the function check.

Torque specifications

No sourced torque values from the manufacturer are recorded for this firearm. Where a fastener has a specified torque — action screws, scope bases, muzzle devices, barrel nuts — get it from the manufacturer or a gunsmith rather than estimating it.

What the manufacturer does say: The manufacturer's documents give no torque value. They say: "The gas block assembly is factory fitted using special fixtures and torque tools." (Instruction Manual for Ruger Mini Thirty Rifles, PDF p. 25) "Then tighten the eight top screw each a bit at a time to grip the scope body." (Instruction Manual for Ruger Mini Thirty Rifles, PDF p. 31)

Reported by other sources — not the manufacturer

Not a manufacturer specificationThese values come from the people and publications named beside each one, not from Sturm, Ruger & Co.. They are recorded with who said them and their exact words so you can judge them — not as a recommendation. Confirm any of them with the manufacturer or a licensed gunsmith before you put a wrench on your firearm; a wrong value can crack a stock, strip a thread or loosen a muzzle device.
FastenerTorqueWho says so, and their wordsWhere it comes from
Gas block screws (four top screws) — black screws
Ruger Mini Thirty fitted with the Accuracy Systems Gen 4 adjustable gas block
32 in-lb
3.6 N·m · 2.7 ft-lb

Reported by Accuracy Systems, Inc.
Secondary — a parts or tool maker, or a gunsmithing publisher

Seat the factory gas bushing into the new block; snug each of the four top screws evenly with the supplied Allen wrench; tighten in an alternating criss-cross pattern keeping the gap between top and bottom halves even on both sides; then torque in the same pattern, a little at a time on each screw.

“Torque Specifications for Gas Block Screws are black screws 32 inch LBS and stainless screws 28 inch LBS. Except for the set screw!!”

New Generation 4 Positive Click Adjustable Gas Block Instructions (page title: Mini 14 30 Pin Bedding Instructions) — Accuracy Systems, Inc. accuracysystemsinc.com [2]
Gas block screws (four top screws) — stainless screws
Ruger Mini Thirty fitted with the Accuracy Systems Gen 4 adjustable gas block
28 in-lb
3.2 N·m · 2.3 ft-lb

Reported by Accuracy Systems, Inc.
Secondary — a parts or tool maker, or a gunsmithing publisher

Seat the factory gas bushing into the new block; snug each of the four top screws evenly with the supplied Allen wrench; tighten in an alternating criss-cross pattern keeping the gap between top and bottom halves even on both sides; then torque in the same pattern, a little at a time on each screw.

“stainless screws 28 inch LBS”

New Generation 4 Positive Click Adjustable Gas Block Instructions (page title: Mini 14 30 Pin Bedding Instructions) — Accuracy Systems, Inc. accuracysystemsinc.com [2]
Gas block screws (four top screws) — ceiling
Ruger Mini Thirty fitted with the Accuracy Systems Gen 4 adjustable gas block
max. 40 in-lb
4.5 N·m · 3.3 ft-lb

Reported by Accuracy Systems, Inc.
Secondary — a parts or tool maker, or a gunsmithing publisher

Seat the factory gas bushing into the new block; snug each of the four top screws evenly with the supplied Allen wrench; tighten in an alternating criss-cross pattern keeping the gap between top and bottom halves even on both sides; then torque in the same pattern, a little at a time on each screw.

“WARNING: DO NOT OVER TIGHTEN THE FOUR TOP GAS BLOCK SCREWS (40 Inch LBS maximum)!!!”

New Generation 4 Positive Click Adjustable Gas Block Instructions (page title: Mini 14 30 Pin Bedding Instructions) — Accuracy Systems, Inc. accuracysystemsinc.com [2]

Materials and factory finish

As stated by Sturm, Ruger & Co.. Prep, masking and cure depend on these; a polymer or aluminium part, a nitrided or anodised finish, and a blued steel part are each a different job. Variants with other finishes may exist — check the maker's page for the exact SKU on the bench.

ComponentMaterialFactory finishWhere it comes from
Receiver
Model 5804 (hardwood stock)
Stainless SteelMatte StainlessRuger Mini-14 Mini Thirty Rifle Autoloading Rifle — Specifications (model 5804) — Sturm, Ruger & Co. ruger.com [3]
“Material Stainless Steel … Finish Matte Stainless”
Stock
Model 5804
Hardwood—Ruger Mini-14 Mini Thirty Rifle Autoloading Rifle — Specifications (model 5804) — Sturm, Ruger & Co. ruger.com [3]
“Stock Hardwood”
Receiver
Mini Thirty
solid steel—Ruger Mini-14 Mini Thirty Rifle Autoloading Rifle — Specifications (model 5804) — Sturm, Ruger & Co. ruger.com [3]
“Integral scope mounts, machined directly on the solid steel receiver, provide a stable mounting surface for included scope rings, eliminating a potential source of looseness and inaccuracy in the field.”

Parts list

Transcribed from the manufacturer's parts list (Instruction Manual for Ruger Mini Thirty Rifles — Sturm, Ruger & Co., Inc., p. 36–40 ruger-docs.s3.amazonaws.com [1]) — Mini Thirty; part numbers differ between blued, stainless and synthetic-stock models. Exploded views on pp. 41 & 42. Key numbers refer to the exploded view in that document.

63 parts
KeyPartPart no.QtyGroup
1Barrel, Specify Model & Serial Number
Parts so marked must be factory fitted. Part numbers by model: 0M8002 — Mini Thirty - blued models; K0M8002 — Mini Thirty - stainless models.
0M8002 / K0M80021
2Receiver
Part numbers by model: MS00113 — Mini Thirty - blued models; KMS00113 — Mini Thirty - stainless models.
MS00113 / KMS001131
3Front SightMS044061
4Front Sight Cross PinMA072011
5Gas Block, Top & Bottom, 2 pieces
Parts so marked must be factory fitted. Part numbers by model: MS03503 — Mini Thirty - blued models; KMS03503 — Mini Thirty - stainless models.
MS03503 / KMS035031
6Sling Swivel, Front
Part numbers by model: MS07500 — Mini Thirty - blued models; KMS07500 — Mini Thirty - stainless models.
MS07500 / KMS075001
7Gas Block Screw
Part numbers by model: MS06500 — Mini Thirty - blued models; KMS06500 — Mini Thirty - stainless models.
MS06500 / KMS065004
8Gas PipeKMS036001
9Gas Port BushingKMS025031
10Slide Assembly
Part numbers by model: MS23708 — Mini Thirty - blued models; KMS23708 — Mini Thirty - stainless models.
MS23708 / KMS237081
11Extractor
Part numbers by model: MS01403 — Mini Thirty - blued models; KMS01403 — Mini Thirty - stainless models.
MS01403 / KMS014031
12Firing Pin
Parts so marked must be factory fitted.
KMS011031
13Bolt
Part numbers by model: MS01009 — Mini Thirty - blued models; KMS01009 — Mini Thirty - stainless models.
MS01009 / KMS010091Bolt Assembly
14Extractor PlungerKMS016001Bolt Assembly
15Extractor SpringMS015001Bolt Assembly
16Buffer Cross Pin
Part numbers by model: MS06610 — Mini Thirty - blued models; KMS06610 — Mini Thirty - stainless models.
MS06610 / KMS066101
17Buffer Bushing
Part numbers by model: MS04010 — Mini Thirty - blued models; KMS04010 — Mini Thirty - stainless models.
MS04010 / KMS040101
18Buffer Guide Rod
Part numbers by model: MS03901 — Mini Thirty - blued models; KMS03901 — Mini Thirty - stainless models.
MS03901 / KMS039011
19Slide SpringKMS051011
20Rear Sight BaseMS055041Rear Sight Assembly
21Rear Sight Dovetail SlideMS059111Rear Sight Assembly
22Rear Sight Windage ScrewMS059012Rear Sight Assembly
23Rear Sight ApertureMS052061Rear Sight Assembly
24Bolt Lock Plunger
Part numbers by model: MS04500 — Mini Thirty - blued models; KMS04500 — Mini Thirty - stainless models.
MS04500 / KMS045001
25Bolt Lock Plunger SpringKMS046001
26Ejector Bolt Lock
Part numbers by model: MS03211 — Mini Thirty - blued models; KMS03211 — Mini Thirty - stainless models.
MS03211 / KMS032111
27Cover Plate
Part numbers by model: MS06700 — Mini Thirty - blued models; KMS06700 — Mini Thirty - stainless models.
MS06700 / KMS067001
28Rear Sight Attachment ScrewMS057111
29Trigger Bushing
Part numbers by model: MS04300 — Mini Thirty - blued models; KMS04300 — Mini Thirty - stainless models.
MS04300 / KMS043001
30Secondary Sear
Parts so marked must be factory fitted. Part numbers by model: MS02300 — Mini Thirty - blued models; KMS02300 — Mini Thirty - stainless models.
MS02300 / KMS023001
31Trigger
Parts so marked must be factory fitted. Part numbers by model: MS02000 — Mini Thirty - blued models; KMS02000 — Mini Thirty - stainless models.
MS02000 / KMS020001
32Secondary Sear SpringKMS024001
33Trigger SpringKMS048001
34Safety Assembly
Part numbers by model: MS13800A — Mini Thirty - blued models; KMS13800A — Mini Thirty - stainless models.
MS13800A / KMS13800A1
35Safety Spring Retainer Pin
Part numbers by model: MS06200 — Mini Thirty - blued models; KMS06200 — Mini Thirty - stainless models.
MS06200 / KMS062001
36Trigger Housing
Part numbers by model: P01300 — Mini Thirty - blued models; KP01300 — Mini Thirty - stainless models; KMS01301 — Mini Thirty Synthetic Stock model.
P01300 / KP01300 / KMS013011
37Safety Detent SpringKMS049001
38Trigger Pivot Pin
Part numbers by model: MS02100 — Mini Thirty - blued models; KMS02100 — Mini Thirty - stainless models.
MS02100 / KMS021001
39Hammer Pivot Pin
Part numbers by model: MS01900 — Mini Thirty - blued models; KMS01900 — Mini Thirty - stainless models.
MS01900 / KMS019001
40Hammer
Parts so marked must be factory fitted.
KMS017001
41Trigger Guard
Part numbers by model: MS00200 — Mini Thirty - blued models; KMS00200 — Mini Thirty - stainless models.
MS00200 / KMS002001
42Hammer Strut
Part numbers by model: MS01800 — Mini Thirty - blued models; KMS01800 — Mini Thirty - stainless models.
MS01800 / KMS018001Hammer Strut Assembly
43Hammer SpringKMS047001Hammer Strut Assembly
44Rear Magazine Latch
Part numbers by model: MS03103 — Mini Thirty - blued models; KMS03102 — Mini Thirty - stainless models.
MS03103 / KMS031021
45Magazine Latch Spring
Part numbers by model: MS05000 — Mini Thirty - blued models; KMS05000 — Mini Thirty - stainless models.
MS05000 / KMS050001
46Magazine Latch Pivot Pin
Part numbers by model: MS01200 — Mini Thirty - blued models; KMS01200 — Mini Thirty - stainless models.
MS01200 / KMS012001
47Stock, WoodMS004021Stock Assembly
48Butt PadD063041Stock Assembly
49Butt Pad ScrewD-842Stock Assembly
50Stock Reinforcement Lock WasherMS080002
51Stock Reinforcement Screw
Part numbers by model: MS06900 — Mini Thirty Wood Stock - blued; KMS06900 — Mini Thirty Wood Stock - stainless.
MS06900 / KMS069002
52Stock Reinforcement
Part numbers by model: MS20702 — Mini Thirty Wood Stock - blued; KMS20702 — Mini Thirty Wood Stock - stainless.
MS20702 / KMS207021
53Forearm Liner & Stock Cap Assembly
Part numbers by model: MS02200 — Mini Thirty Wood Stock - blued; KMS02200 — Mini Thirty Wood Stock - stainless.
MS02200 / KMS022001
54Handguard AssemblyMFH1
55Sling Swivel, Rear
Part numbers by model: MS07601 — Mini Thirty - blued models; KMS07600 — Mini Thirty - stainless models.
MS07601 / KMS076001
56Magazine, CompleteMAG/7631
57Scope Rings, Medium, Complete Assembly
Part numbers by model: S100RM — Mini Thirty - blued models; KD72M-MATTE — Mini Thirty - stainless models.
S100RM / KD72M-MATTE1
58Stock Assembly, Synthetic
For Mini Thirty Synthetic Stock model.
MS304271Component Parts for Synthetic Stock Model
59Butt Pad
For Mini Thirty Synthetic Stock model.
D063151Component Parts for Synthetic Stock Model
60Butt Pad Screw
For Mini Thirty Synthetic Stock model.
B-912Component Parts for Synthetic Stock Model
61Pistol Grip Cap
For Mini Thirty Synthetic Stock model.
D-80SB1Component Parts for Synthetic Stock Model
62Pistol Grip Cap Screw
For Mini Thirty Synthetic Stock model.
C-96SM1Component Parts for Synthetic Stock Model
63Pistol Grip Cap Medallion
For Mini Thirty Synthetic Stock model.
D-821Component Parts for Synthetic Stock Model

Function check

After every reassemblyPerform these checks on a verified-unloaded firearm. If any check fails, the firearm is not safe to fire — stop and see a licensed gunsmith.

Maintenance

Lubrication points

Cleaning notes

The gas system is self-cleaning and does not require routine disassembly. Focus on the bolt, chamber, bore, and slide track. Surplus 7.62x39mm may be corrosively primed — clean accordingly.

Suggested inspection interval: roughly every 1000 rounds. This is a general guideline, not a manufacturer specification.

Wear parts to inspect

Recoil spring · Extractor and ejector · Bolt lugs · Magazine feed lips

Common issues

SymptomLikely causeWhat to do
Slide will not come offDisassembly notch not aligned with the receiver guide ribMove the slide a small amount at a time until the notch aligns. Never pry.
Extraction problems with steel-cased ammunitionLacquered or polymer-coated cases in a fouled chamberClean the chamber thoroughly and try brass-cased ammunition to isolate the cause.

Similar manual of arms

Sourcing

Confidence
high — Cross-checked against a primary source such as the manufacturer's manual or an issuing military technical manual.
Verification
Checked against the manufacturer manual
Last updated
2026-10-29

References

Every source this page draws on, with its web address so you can read it yourself. Numbers in brackets elsewhere on the page point here.

Notes: Verified and expanded on 2026-09-14 against the factory manual. Same corrections as the Mini-14 entry: the cocked-hammer and safety-on precondition, the 1/4 in rod through the trigger guard, Ruger's warning against using a cartridge as the lever, and the heavily compressed recoil spring. Mechanically the Mini Thirty is a Mini-14 rebarrelled and rebolted for 7.62x39mm; the takedown is identical. Production spans several series with gas system differences — confirm against the manual for your serial range.

Found something wrong? Corrections are the most valuable contribution to this project. Open an issue with the model, the step, and a source.