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RPK

• easy
• Shop tier 2
• medium confidence
• Rifle
• long stroke piston
• toolless field strip
• squad automatic
• heavy barrel

field strip ~2 min · reassembly ~2 min · detail strip ~40 min

Specifications

Model-specific safety

• The safety lever also covers the charging handle slot. With the lever up on SAFE the bolt cannot travel far enough to inspect the chamber properly — rotate it down before clearing.
• The magazine rocks in and out and is not released by a button. Rock it forward and out.
• The recoil spring assembly is under compression and springs rearward when the dust cover is removed.
• Gas system parts are extremely hot after firing.
• Surplus ammunition may be corrosively primed. Clean with a water-based solvent the same day you shoot.

Under spring tension

• Recoil spring assembly
• Magazine spring

Easily lost parts

Recoil spring guide rod tab · Gas tube lever · Firing pin retaining pin

Tools

No tools required for the field strip.

Shop difficulty

Shop tier 2 Tier 2 — moderate among rifles and carbines, for the full job: strip to the parts that get coated and put it back together working. AKM-pattern action, so the shop job is the AK fire-control group. The hammer and trigger pins depend on a retaining spring that must be routed exactly, and the hammer spring is strong and bites. There is no timing, and the riveted receiver and pinned barrel stay together, which keeps it at Tier 2.

No sourced part count yet.

Bench time: about 50 min to strip, 80 min to rebuild (estimate). AK fire-control group, bolt, furniture, plus the RPK bipod and rear sight. Rebuild time is driven by the retaining-spring routing.

What comes off for coating

• Receiver: dust cover, recoil spring assembly, bolt carrier and bolt, retaining spring (shepherd's hook) or plate, hammer, trigger, disconnector and springs, safety selector, magazine catch, rear sight leaf — AK trigger pin punch / slave pin
• Bolt: firing pin retaining pin, firing pin, extractor pin, extractor, spring
• Furniture: upper/lower handguard and retainer, pistol grip screw, buttstock screws, gas tube (lever)
• Bipod / barrel: bipod and clamp, front sight hood, muzzle device

Special tools

• AK fire-control slave pins or punches — Hammer and trigger pins
• AK front sight adjustment tool — If the front sight post is removed

Known pain points

• The hammer/trigger-pin retaining spring has to be routed through the right anchor points. It can sit several ways and only one is right, so the group has to be refitted and checked over and over. (reassembly)
  Owners report: AK Reassembly - It Took A Lot Of Wriggling — Ballseye's Boomers (owner blog) ballseyesboomers.blogspot.com [3] — “Not only are there several ways this particular spring might possibly fit, only one of which was correct, but you have to continually reassemble the hammer and trigger group into the receiver to see if you got it right, then take them out again if wrong.”
• The hammer spring's legs are wrapped round the hammer to clear the pins and are under heavy tension. They spring loose while the hammer is fitted. (reassembly)
  Owners report: AK Reassembly - It Took A Lot Of Wriggling — Ballseye's Boomers (owner blog) ballseyesboomers.blogspot.com [3] — “one of its ends came off of the hammer, flew around due to a good amount of tension in them caused by having wrapped them around the hammer, and then embedded itself into one of my fingers”

Fit or check on rebuild

• Retaining spring seated in both pin grooves — An unlatched spring lets the trigger pin walk out.
• Dust-cover tab through the cover — Otherwise the cover comes off under recoil.
• Function check (safety, trigger reset, feeding, extraction) — Standard after any detail strip. No single source.
• Re-zero sights or scope — Sights and optics come off for coating, and point of impact must be re-confirmed. This is a standard check, so no source.

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

Procedures

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.

Function check

• Verify the rifle is unloaded with no magazine inserted before each step.
• With the safety lever on SAFE, confirm bolt travel is restricted and the trigger does nothing.
• Rotate the safety to FIRE, charge the rifle, and press the trigger. The hammer should fall.
• Hold the trigger back, charge the rifle, and release slowly — you should hear the disconnector click.
• Confirm the dust cover is locked down and the recoil spring tab protrudes through it.
• Confirm the magazine rocks in and locks positively.

Maintenance

Lubrication points

• Bolt lugs and body
• Carrier rails
• Cam track in the carrier
• Gas piston (a light film only)
• Hammer and trigger pivots

Cleaning notes

Corrosive surplus primers leave salts that rust a bore within days. Flush the bore, gas tube, piston, and bolt face with hot soapy water or a water-based solvent the same day, dry completely, then oil. Keep the firing pin channel dry — a firing pin held forward by congealed grease causes slam fires.

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

Wear parts to inspect

Recoil spring · Firing pin (check it moves freely) · Extractor and spring · Gas piston · Rivets and trunnion on high-round-count rifles

Common issues

Similar manual of arms

• AKM / AK-47 Pattern Rifle

Sourcing