The B.R.E — The Samson Bufferless Receiver Extension with picatinny folding stock adapter is a 6-position adjustable carbine buffer tube designed to seamlessly integrate with mil-spec AR-15 carbine stocks. Attach to the Brownells BRN-180®, Sig Sauer MCX, Sig Sauer MPX and other buffer less set ups. FEATURES: Compatible with mil-spec AR-15 adjustable carbine stocks 6 position adjustable Folding Mechanism can be removed and reattached for right side fold Ramp to drastically improve ease of installing AR-15 stock Skeletonized to reduce weight, and.... because it looks cool Designed, Manufactured and Finished in Keene, New Hampshire, USA SPECIFICATIONS: Material: 6061-T6 Aluminum Finish: MIL-A-8625 type III class 2 anodizing SIZE: Length: 6.36" Width: .09" Height: 1.44" Weight 6.7oz **Stock not included**