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Special Shipping Requirements

Many rocketry products require special shipping.
Engines require HAZ-MAT shipping See our SHIPPING area before placing an order to avoid delays and further charges.
Any products with HAZ in the description require shipping regulated by the federal government. Other products like fin stock and body tubes may also require special boxes. Please see our SHIPPING listings to learn more before placing an order.

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Commonwealth Rocketry, LLC.

47887 Michigan Ave. Suite 207
Canton, Michigan 48188
734-722-Rocket (7625)
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Home » Additional Products » Model Rocketry Lugs, Buttons, Rails and Rods


List Price: $4.99
Price: $3.99


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PMR (Perfect Motor Retention)

Never Loose Your
Aerotech RMS24 Motor Again!

The PMR system HOLDS your reload motor in place.
Perfect Motor Retention System
The PMR system shown fits a Aerotech
or Rouse Tech 24mm Reload Motors.

It will even hold your regular rocket motors.

How Does It Work?

Drill 2 holes into your aft motor mount ring. Attach 4/40 inserts found in our hardward area to your aft motor mount ring. Screw in the INSERT NUTS into the aft motor mount ring using some epoxy glue.

Load the motor attache the PMR and screw the assembly down. 4/40 screws can be found in our Hardware Area.
Load up your RMS or any motor and then slip the PMR retainer
over top and fasten with 4-40 screws (not supplied)

Your are purchasing: One Laser Cut PMR Retainer

Due to humidity and diferences in wood you may need to slightly sand the PMR dervice for a perfect fit. Laser cut products have blackened edges due to the LASER cuttting process. Sanding or coating with epoxy is advised.
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