Midwest Industries AR Receiver Extension Lock Ring/Castle Nut M4BSTK-CN

                - This part is NOT to be used on a AR15 or similar rifle that requires the bolt to travel into a...

- Allows KeyMod Handguards to use M-Lok accessories- Available in 1 Slot and 2 Slot versions- Constructed from 6061 aluminum, hard coat anodized- US Patent #9,766035 B2- 100% made in...

Sits only .4375" when folded Extremely low profile dual aperture design Locking detent with large surface area for maximum strength Same ball detent battle proven design of similar sight from...

  Complete install in minutes, removal of delta ring is required Installs on a GI barrel nut, not included with hand guard Featuring a monolithic type continuous top rail Features...

Complete install in minutes, removal of delta ring is required Installs on a GI barrel nut, not included with hand guard Featuring a monolithic type continuous top rail Features four...

      • Precision CNC Machined from 6061-T6 Aircraft Grade Aluminum and Finished in a Matte Black Anodize• 0.87" Saddle Height Positions RMR® at the Correct Height for an...

    SIG SAUER picatinny rail mounted flip up front and rear iron sight set for AR platform rifles and variants. Easy to install, use and stow. Windage and elevation...

•  Proudly Designed and Made in USA •  Stock Molded from Impact Resistant High Strength Matte Black Polymer •  Built for Heavy Duty Use with the Tightest Tolerance Controls to...