64 MPR mag release extension - PITA Good Way

Hellbender

Gunny Sergeant
Full Member
Minuteman
Apr 23, 2008
1,560
314
Lebanon, Missouri
Part 2 in the series.

The "Cheap No-Drill" way works well; I used it for a while, scratched my gun up another time or 2 and said OK, I guess I can drill a hole in it now, I'm gonna keep it.

Get your parts.
1. An 8-32 x 3/8" long socket head cap screw (longer can be cut to length)
2. An 8-32 nut.
3. Red locktite
4. If you REALLY want to do it right, get an 8-32 tap (must be HSS, carbon is too soft) and #29 drill, but this is not necessary, this will be noted as OPTIONAL STEP.

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Remove your action from the stock.

Clamp the bbl in a padded vise with the mag release up.

Cover up everything but the release, I just cut a small hole in a big rag and laid it over everything.

The mag release is HARD, a center punch will not mark it, and normal drill bits will not drill it. Dremel time......I had some cheap Harbor Freight diamond coated grinding bits I used but any type of small, pointy stone will work 1/8" or smaller diameter.

Look at the pics and grind a small hole in the button towards the rear, keep it centered. Grind hole big enough for tight clearance on 8-32 bolt.

OPTIONAL STEP....Grind hole slightly undersize for #29 drill, clamp in drill press and drill to size, then tap with 8-32 HSS tap.
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Grind the sides of the 8-32 nut down until it will slide tightly into the release button.

Assemble everything together and check for clearance everywhere, grind as needed, I had tons of room everywhere. Make sure all your mags work.
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Disassemble, Clean everything well with brake cleaner, Locktite everything and tighten it all down.

Assemble rifle and pat yourself on the back!
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Brad