Length Of Pull Limiter LOP AR Set Of Four 3D Printed in ABS material for strength and durability. Designed using a mil-spec buffer tube. See photos for details. Please ask any questions prior to purchasing. **Expect USPS shipping, receipt, scanning and tracking information delays due to the virus. 10-15 days or more is not uncommon, if you cannot wait, please do not purchase** Ebay's delivered by dates are not accurate and have not been since the start of the virus. 2 position limiters Listed in my other items.