The Battle Arms Development VERT PDW Stock System Complete Buffer is a simple drop-in replacement for the BAD-CSS and BAD-PDW stocks. No Proprietary Bolt Carrier Group is required. This Ultra Compact Buffer reduces recoil by using a Dual Spring Buffer Design

Specifications:
Dual Spring Buffer Design
9mm Buffer
Compatible with Most blow-back Bolt Carrier Groups
Weight: 5.7oz,
Made in the USA
Use of NICKEL BORON Coated Bolt Carrier may cause damage to the buffer system due to the I.D. (Inside Diameter) of the BCG being undersized
Inside, the rear cavity of the bolt carrier must be .625in diameter x .625in deep minimum to clear the buffer. Damage may occur if proper clearance isn't met.

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.