Pro Series SA Polymer MDT (Gen1) 308 +4 Extension


Pro Series SA Polymer MDT 308 +3 Extension

Add four rounds of capacity to your SA Polymer MDT 308 magazine with the MK Machining Pro Series SA Polymer MDT 308 +3 extension.  Redesigned shape for increased strength and durability. Now printed from tough PA12 Nylon Material. Easily installs in under a minute, simply remove baseplate and slide on extension. Proudly printed on top notch machines from PA12 Nylon. Extremely lightweight, lifetime warranty, and made in the USA! Reuses stock spring and follower.  We were able to squeak in +4 with a bit of a thumb workout.

If you do not know what generation of magazine you have, please contact: [email protected]


Check out the rest of our store here

Weight 2 oz
Dimensions 4.5 × 1 × 1 in


There are no reviews yet.

Be the first to review “Pro Series SA Polymer MDT (Gen1) 308 +4 Extension”

Your email address will not be published. Required fields are marked *

Content missing

Shopping Cart
Scroll to Top