Pro Series SA Polymer MDT (Gen1) 308 +3 Extension

Add four rounds of capacity to your Gen1 SA Polymer MDT 308 magazine with the MK Machining Pro Series SA Polymer MDT (Gen1) 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.

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