DoubleStar is a high quality manufacturer of AR-15 parts and accessories. They are proud to offer you their M4 Socom Castle Nut. The Castle Nut will lock extension tubes to receivers, and will ensure that your M4 Socom stock will not come loose.DoubleStar M4 Socom Stock
Specifications and Features:
Black Phosphate Finish
Made in the USA
Note: This product is new and being closed out; sold "As Is" and is not returnable to Cheaper Than Dirt. Please contact the manufacturer for warranty and assistance.