SIG MMG 338 Program Series

An Ambidextrous 80% AR-15 Lower Receiver

Garden Grove, CA., (December 8th, 2021) – 80 PERCENT ARMS, the leading producer of 80% lowers, 80% lower jigs, and 80% pistol frames, debuts the latest in their line of AR-15 receivers you can build at home: an all-new ambidextrous 80% AR-15 lower receiver.

This premium ambi lower brings new bold and functional styling to 80% lowers. A freshly contoured design with a host of features gives fresh aesthetics with new functions to the 80% builder space. We’ve included the ability to drop the bolt from the right side of the receiver, aiding in speed reloads and getting the shooter back on the gun faster.

80% Arms has incorporated several other features to improve shootability of the lower receiver as well. A trigger pre-travel take-up tension screw has been included to improve the pull on triggers that may have excessive pre-travel by providing upwards tension on the rear of the trigger unit.

Additionally, a receiver tension screw is included with the receiver, allowing for tension to be placed on the rear takedown pin lug of an upper receiver, removing slop or movement between receivers where the aftermarket match may not be as precise as desired.

Because even the little things matter, 80% Arms has threaded the rear takedown pin spring hole, to make installation of the lower parts kit (especially the backplate), a breeze.

Finally, the rearward safety selector stop has been abbreviated to allow easier manipulation of the safety selector when hands are wet or slippery by allowing more thumb engagement on the safety selector lever.

The 80% ambi lower is the latest in a rapidly expanding catalog of premium 80% receivers offered by 80% Arms. It’s available online at www.80percentarms.com, and ships directly to your door.

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