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BOLT LAPPING TOOLS Reviews & Ratings

The Brownells Bolt Lapping Tool is a spring-loaded tool that gives constant, straight-back pressure to keep bolt lugs square against the receiver while lapping with 600 to 800 grit, silicon carbide abrasive. Provides better results than mere thumb pressure. The interchangeable threaded sleeves fit popular actions listed below:

M14/M1A sleeve includes large diameter plunger and special lapping handle required for these models.

Mauser Large sleeve fits large ring Mauser actions.

Mauser Small sleeve fits small ring Mauser actions.

Savage Small sleeve fits Savage actions in all calibers except Rem Ultra Mag (RUM), Rem SA Ultra Mag (RSUM), and Win Short Mag (WSM).

Savage Large sleeve fits Savage actions only in RUM, RSUM, and WSM calibers.

Remington 700 sleeve fits Remington 700 style actions.

The 2 & 3-Piece Bolt Lapping Kits contain all tools necessary for their particular firearm.

The Complete Bolt Lapping Tool Kit contains all tools necessary to lap all models listed.

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A good tool set

easy to use and adds the final touch in blueprinting a action

by JAMES ALLAN KNIGHT on November 14, 2023

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Was this review helpful? 4

Very nice fit of parts.

I bought this one-gun kit after trying to use the plunger body from the M14/M1/M1A kit. It did not fit a sleeve I had bought for the Large Ring Mauser. After receiving this kit with it's plunger body I then began trying all the parts one at a time. Both plunger bodies are 0.5620" and the sleeves are 0.5625 except the M14, it was 0.563. There were little burrs on the plunger body of the M14 kit that made me think it would not fit the different sleeves. All fit well after a little lapping. I plan on using the bolt lug lapping tool for several rifles I am building. After using the tool I believe I can use it to square the bolt face on a Mauser Large Ring VZ-24. After reaming the sleeve from existing 9/16" to a 5/8" I will press fit a drill bushing that is 5/8 x 3/8 and use the Mason Reamer Burr which has a 3/8" shaft. The Burr has been ground to 0.3740 to 0.3745. It has a buttery slip fit in the Drill Bushing. Mauser threads are at a 55 deg pitch and not easy to find. Brownells sells the sleeve with the right threads for the '98 and the face truing Burrs. All you need is the drill bushing, the undersized drill, and the reamer to make the altered sleeve to be able to Lapp the lugs with the original unaltered sleeve, and true the face of your bolt with your altered sleeve. After, of course, you check that the receivers threads are true to the action. This can be checked with a mandrel which Brownells has too. This can be done for any rifle that Brownells has a sleeve for. Happy Gunsmithing, JL.