The Desert Tech Quattro-15 (brand part no. QTRLR15B53) is a multi-caliber AR-15 lower receiver built around Desert Tech’s proprietary Quadmag-53, a 53-round magazine, and ships with one included. It’s a drop-in fit with all standard AR-15 upper receivers, so there’s no special machining or fitment needed to pair it with an existing upper. The 53-round magazine capacity means a shooter can carry a 210-round loadout with just four magazines instead of the seven a standard 30-round magazine setup would require. It’s a strong option for builders who want dramatically higher magazine capacity without switching platforms.

Key Specifications

• Built around the Quadmag-53, Desert Tech’s proprietary 53-round magazine.
• Ships with one Quad53 magazine included.
• Also accepts standard AR-pattern magazines in addition to the Quadmag-53.
• Rated multi-caliber, compatible with common AR-15 chamberings.
• Offers drop-in compatibility with all standard AR-15 upper receivers.
• Finished in black for a versatile appearance.

Frequently Asked Questions

Does this lower only work with the 53-round magazine? No, it also accepts standard AR-pattern magazines in addition to the included Quadmag-53.

Is a magazine included? Yes, one Quad53 53-round magazine ships with the receiver.

Buy the Desert Tech Quattro-15 Multi-Caliber Lower Receiver

Carry more rounds per magazine on a drop-in-compatible lower, part of our AR15 lowers selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.