The Enhanced Pistol Tube features a slot in the threads to allow use of a standard end-plate and castle nut.

Features:

• Fits standard AR15 and M5 (.308) lower receivers
• 7075 Aluminum
• Tube only (no endplate/buffer/spring)
• Uses a stardard end-plate and standard castle nut
• Made in the USA
• Weight (oz) 3.8 oz
• Buffer Length: 3.25″