Build your rifle from a strong foundation! Boasting aesthetics, performance, and practical features, the OTR-15 receiver set is the start to your dream rifle. Hours of meticulous design, engineering, and testing went into crafting the OTR-15 Lower Receiver so it would live up to the expected ODIN Works quality and performance. What you should expect to feel when you get your OTR-15 Receiver Set is outstanding ergonomics, precise tolerances, and a refinement that is still durable. The OTR-15 lower is machined in house from billet 7075 aluminum with features and style in mind. Machined to match the ODIN Works billet upper, the OTR-15 Receiver Set provides a best in class chassis. The Billet Upper Receiver has a sleek design, No Forward Assist and low profile brass deflector. The OTR-15 Receiver Set guarantees you'll stand out in a crowd and above all else, gives you the top shooting performance that you require.