Knights Armament SR-15 Mod 1 E3. Knights armament sr15 mod 1 e3 with less than 100 rounds fired. The handguard has a heatsheild between it and the barrel that was only done on the early production mod 1 making it more collectible than others. Knights armament stuff is a great investment with a strong market. I have a standing offer over 10k for one of my other kac rifles and their value keep going up outpaceing inflation. kac standard lower has a geissele trigger hrf Magwell and bcm furniture. The retro insight light and eotech su231 setup can go with it for another 600. Ill take m855 at 55 cents a round trade value or constitutional silver.