The RT-15 features an advanced metal-reinforced polymer upper receiver paired with RTAC's poly lower for a reliable and extremely lightweight rifle.The polymer lower on this RT-15 is rugged and light making it the perfect rifle foundation. A lighter rifle makes handling and aiming easier for any and all shooters regardless of experience level.With a full magazine loaded optics lights and muzzle device custom AR-15s can become excessively front-heavy. Get ahead of that problem with the lightweight receiver set in this RT-15!Metal-reinforced polymer upper receiver lightweight and tough1:8 twist barrelLightweight 10" M-LOK handguardFull Bolt Carrier Group and charging handlePolymer lower w/ oversized trigger-guard6-position collapsible stockMagpul PMAGWhen you aim and fire your RT-15 the major difference you will notice will be the ease of holding the weapon out and level due to the weight savings. This advantage is critical when taking precision shots from a standing position.The lightweight RT-15 provides a reduction in sight picture sway and an increase in the duration of time that you can maintain sight picture on target as your shoulders and arms will not fatigue as quickly compared to using other heavier 16" barrel AR-15s.This allows more range time and more precise shots on target before losing that edge. The RT-15 is an easy-to-use and reliable rifle that is fit for the beginner or the advanced AR-15 collector looking for something new. Out of the box this rifle can be loaded up and equipped with your favorite irons or optics and taken to the range. Ships with an included 30-round Magpul PMAG magazine Cable-lock for storage and a manual. Make sure to add some additional AR-15 magazines to your order you can never have too many!Searching for .223/5.56 ammunition? Score big savings and fast shipping when you shop our online selection of cheap 223/5.56 ammo from the top brands you know and trust.This polymer lower does not need to have its castle nuts tightened torqued or staked as it is factory torqued with blue Loctite and will not come loose.